diff --git a/examples/solana_anchor/expenses_splitting/.vscode/settings.json b/examples/solana_anchor/expenses_splitting/.vscode/settings.json
new file mode 100644
index 0000000..b448937
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/.vscode/settings.json
@@ -0,0 +1,5 @@
+{
+  "rust-analyzer.linkedProjects": [
+    "./program/programs/ExpenseSplitter/Cargo.toml"
+  ]
+}
diff --git a/examples/solana_anchor/expenses_splitting/README.md b/examples/solana_anchor/expenses_splitting/README.md
new file mode 100644
index 0000000..feebb17
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/README.md
@@ -0,0 +1,43 @@
+# Expenses splitting
+
+This program does expenses splitting on Solana. The program manages group accounts.
+Anyone can create a group by providing addresses and initial balances. The group account holds balances for each of its members.
+The sum of balances of a group always sum zero.
+Members can log payments by providing addresses, payments and participation factors.
+Group members can add and remove members.
+
+# Program template
+
+Template that includes the CIDL, and the generated code with its business logic.
+
+Creates a user, and tracks the income and outcome amount per user
+
+## Generate code
+
+```shell
+codigo solana generate cidl.yaml -a
+```
+
+## Build contract
+
+From within the program directory
+
+```shell
+anchor build
+```
+
+## Install program client dependencies
+
+From within the program_client directory
+
+```shell
+npm install
+```
+
+## Test contract
+
+From within the program directory
+
+```shell
+anchor test
+```
diff --git a/examples/solana_anchor/expenses_splitting/cidl.yaml b/examples/solana_anchor/expenses_splitting/cidl.yaml
new file mode 100644
index 0000000..9e15978
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/cidl.yaml
@@ -0,0 +1,112 @@
+cidl: "0.9"
+info:
+  name: ExpenseSplitter
+  title: Expense Splitter Contract
+  version: "1.0.0"
+  summary: A contract for managing group expenses, allowing members to split costs fairly.
+  contact:
+    name: "Developer Name"
+    web: "https://developerwebsite.com"
+    email: "contact@developerwebsite.com"
+    git: "https://github.com/developer/ExpenseSplitter"
+  license:
+    name: "MIT License"
+    identifier: "MIT"
+    url: "https://opensource.org/licenses/MIT"
+
+solana:
+  seeds:
+    groupAccount:
+      items:
+        - name: "group_name"
+          type: "string"
+
+types:
+  GroupAccount:
+    summary: Represents a group account with members and their balances.
+    fields:
+      - name: "group_name"
+        type: "string"
+        description: "The name of the group."
+        attributes: [cap=100]
+      - name: "members"
+        type: "array<sol:pubkey>"
+        description: "Array of member public keys."
+        attributes: [cap=100]
+      - name: "balances"
+        type: "array<i64>"
+        description: "Array of member balances in lamports."
+        attributes: [cap=100]
+    
+methods:
+  - name: "createGroup"
+    summary: "Creates a new group with initial members and balances."
+    inputs:
+      - name: "group_account"
+        type: sol:account<GroupAccount, seeds.groupAccount(signer=fee_payer)>
+        attributes: [ sol:init ]
+      - name: "group_name"
+        type: "string"
+        description: "The name of the group."
+      - name: "members"
+        type: "array<sol:pubkey>"
+        description: "Array of member public keys."
+        attributes: [cap=100]
+      - name: "initial_balances"
+        type: "array<i64>"
+        description: "Array of initial balances for each member."
+        attributes: [cap=100]
+    solana:
+      default-payer: true
+
+  - name: "addMember"
+    summary: "Adds a new member to the group."
+    inputs:
+      - name: "group_account"
+        type: sol:account<GroupAccount, seeds.groupAccount(signer=fee_payer)>
+        attributes: [sol:writable]
+      - name: "new_member"
+        type: "sol:pubkey"
+        description: "Public key of the new member."
+
+  - name: "removeMember"
+    summary: "Removes a member from the group."
+    inputs:
+      - name: "group_account"
+        type: sol:account<GroupAccount, seeds.groupAccount(signer=fee_payer)>
+        attributes: [sol:writable]
+      - name: "member"
+        type: "sol:pubkey"
+        description: "Public key of the member to remove."
+
+  - name: "logPayment"
+    summary: "Logs a payment made by or for group members, updating balances accordingly."
+    inputs:
+      - name: "group_account"
+        type: sol:account<GroupAccount, seeds.groupAccount(signer=fee_payer)>
+        attributes: [sol:writable]
+      - name: "title"
+        type: "string"
+        description: "Title or description of the payment."
+      - name: "participants"
+        type: "array<sol:pubkey>"
+        description: "Array of participating member public keys."
+        attributes: [cap=100]
+      - name: "amounts"
+        type: "array<u64>"
+        description: "Array of amounts each participant gave to the group."
+        attributes: [cap=100]
+      - name: "participation_factors"
+        type: "array<u64>"
+        description: "Array of participation factors for each participant."
+        attributes: [cap=100]
+
+errors:
+  - id: "GroupBalanceError"
+    msg: "The sum of balances in the group must always sum to zero."
+  - id: "InvalidMemberError"
+    msg: "The specified member does not exist in the group."
+  - id: "InvalidGroupError"
+    msg: "The specified group does not exist."
+  - id: "BalanceMismatchError"
+    msg: "The sum of initial balances does not sum to zero."
\ No newline at end of file
diff --git a/examples/solana_anchor/expenses_splitting/program/.gitignore b/examples/solana_anchor/expenses_splitting/program/.gitignore
new file mode 100644
index 0000000..59a9188
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/.gitignore
@@ -0,0 +1,10 @@
+# This file is auto-generated from the CIDL source.
+# Editing this file directly is not recommended as it may be overwritten.
+
+.anchor
+.DS_Store
+target
+**/*.rs.bk
+node_modules
+test-ledger
+.yarn
diff --git a/examples/solana_anchor/expenses_splitting/program/.prettierignore b/examples/solana_anchor/expenses_splitting/program/.prettierignore
new file mode 100644
index 0000000..9419392
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/.prettierignore
@@ -0,0 +1,10 @@
+# This file is auto-generated from the CIDL source.
+# Editing this file directly is not recommended as it may be overwritten.
+
+.anchor
+.DS_Store
+target
+node_modules
+dist
+build
+test-ledger
diff --git a/examples/solana_anchor/expenses_splitting/program/Anchor.toml b/examples/solana_anchor/expenses_splitting/program/Anchor.toml
new file mode 100644
index 0000000..8f0dcf3
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/Anchor.toml
@@ -0,0 +1,21 @@
+# This file is auto-generated from the CIDL source.
+# Editing this file directly is not recommended as it may be overwritten.
+
+[toolchain]
+
+[features]
+seeds = false
+skip-lint = false
+
+[programs.localnet]
+workspace = "CBdZHhteKeEySFipeE9w2zRsigs3CsGyFEQ9UKwEpfJ5"
+
+[registry]
+url = "https://api.apr.dev"
+
+[provider]
+cluster = "Localnet"
+wallet = "~/.config/solana/id.json"
+
+[scripts]
+test = "yarn run ts-mocha -p ./tsconfig.json -t 1000000 tests/**/*.ts"
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new file mode 100644
index 0000000..5c5d481
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/Cargo.lock
@@ -0,0 +1,1730 @@
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+# It is not intended for manual editing.
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+
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a2fa6e2155d7247be68c096456083145c183cbbbc2764150dda45a87197940c"
+dependencies = [
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b38e32f0abccf9987a4e3079dfb67dcd799fb61361e53e2882c3cbaf0d905d8"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc35310971f3b2dbbf3f0690a219f40e2d9afcf64f9ab7cc1be722937c26b4bc"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a75915e7def60c94dcef72200b9a8e58e5091744960da64ec734a6c6e9b3743e"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f55c233f70c4b27f66c523580f78f1004e8b5a8b659e05a4eb49d4166cca406"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "53d40abd2583d23e4718fddf1ebec84dbff8381c07cae67ff7768bbf19c6718e"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
+
+[[package]]
+name = "zerocopy"
+version = "0.7.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "74d4d3961e53fa4c9a25a8637fc2bfaf2595b3d3ae34875568a5cf64787716be"
+dependencies = [
+ "zerocopy-derive",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.7.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ce1b18ccd8e73a9321186f97e46f9f04b778851177567b1975109d26a08d2a6"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.52",
+]
+
+[[package]]
+name = "zeroize"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4756f7db3f7b5574938c3eb1c117038b8e07f95ee6718c0efad4ac21508f1efd"
+dependencies = [
+ "zeroize_derive",
+]
+
+[[package]]
+name = "zeroize_derive"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce36e65b0d2999d2aafac989fb249189a141aee1f53c612c1f37d72631959f69"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.52",
+]
diff --git a/examples/solana_anchor/expenses_splitting/program/Cargo.toml b/examples/solana_anchor/expenses_splitting/program/Cargo.toml
new file mode 100644
index 0000000..c4769fb
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/Cargo.toml
@@ -0,0 +1,16 @@
+# This file is auto-generated from the CIDL source.
+# Editing this file directly is not recommended as it may be overwritten.
+
+[workspace]
+members = [
+    "programs/*"
+]
+
+[profile.release]
+overflow-checks = true
+lto = "fat"
+codegen-units = 1
+[profile.release.build-override]
+opt-level = 3
+incremental = false
+codegen-units = 1
diff --git a/examples/solana_anchor/expenses_splitting/program/app/program_client/index.ts b/examples/solana_anchor/expenses_splitting/program/app/program_client/index.ts
new file mode 100644
index 0000000..0220ab9
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/app/program_client/index.ts
@@ -0,0 +1,5 @@
+// This file is auto-generated from the CIDL source.
+// Editing this file directly is not recommended as it may be overwritten.
+
+export * from "./pda"
+export * from "./rpc"
\ No newline at end of file
diff --git a/examples/solana_anchor/expenses_splitting/program/app/program_client/pda.ts b/examples/solana_anchor/expenses_splitting/program/app/program_client/pda.ts
new file mode 100644
index 0000000..267976b
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/app/program_client/pda.ts
@@ -0,0 +1,22 @@
+// This file is auto-generated from the CIDL source.
+// Editing this file directly is not recommended as it may be overwritten.
+
+import {PublicKey} from "@solana/web3.js";
+import {BN} from "@coral-xyz/anchor";
+
+export type GroupAccountSeeds = {
+    groupName: string, 
+};
+
+export const deriveGroupAccountPDA = (
+    seeds: GroupAccountSeeds,
+    programId: PublicKey
+): [PublicKey, number] => {
+    return PublicKey.findProgramAddressSync(
+        [
+            Buffer.from(seeds.groupName, "utf8"),
+        ],
+        programId,
+    )
+};
+
diff --git a/examples/solana_anchor/expenses_splitting/program/app/program_client/rpc.ts b/examples/solana_anchor/expenses_splitting/program/app/program_client/rpc.ts
new file mode 100644
index 0000000..9f159b3
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/app/program_client/rpc.ts
@@ -0,0 +1,424 @@
+// This file is auto-generated from the CIDL source.
+// Editing this file directly is not recommended as it may be overwritten.
+
+import {
+  AnchorProvider,
+  BN,
+  IdlAccounts,
+  Program,
+  web3,
+} from "@coral-xyz/anchor";
+import { MethodsBuilder } from "@coral-xyz/anchor/dist/cjs/program/namespace/methods";
+import { ExpenseSplitter } from "../../target/types/expense_splitter";
+import idl from "../../target/idl/expense_splitter.json";
+import * as pda from "./pda";
+
+
+
+let _program: Program<ExpenseSplitter>;
+
+
+export const initializeClient = (
+    programId: web3.PublicKey,
+    anchorProvider = AnchorProvider.env(),
+) => {
+    _program = new Program<ExpenseSplitter>(
+        idl as never,
+        programId,
+        anchorProvider,
+    );
+
+
+};
+
+export type CreateGroupArgs = {
+  feePayer: web3.PublicKey;
+  groupName: string;
+  members: web3.PublicKey[];
+  initialBalances: bigint[];
+  groupAccountSeedGroupName: string;
+};
+
+/**
+ * ### Returns a {@link MethodsBuilder}
+ * Creates a new group with initial members and balances.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ * 2. `[]` system_program: {@link PublicKey} Auto-generated, for account initialization
+ *
+ * Data:
+ * - group_name: {@link string} The name of the group.
+ * - members: {@link PublicKey[]} Array of member public keys.
+ * - initial_balances: {@link BigInt[]} Array of initial balances for each member.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+export const createGroupBuilder = (
+	args: CreateGroupArgs,
+	remainingAccounts: Array<web3.AccountMeta> = [],
+): MethodsBuilder<ExpenseSplitter, never> => {
+    const [groupAccountPubkey] = pda.deriveGroupAccountPDA({
+        groupName: args.groupAccountSeedGroupName,
+    }, _program.programId);
+
+  return _program
+    .methods
+    .createGroup(
+      args.groupName,
+      args.members,
+      args.initialBalances.map(e => new BN(e.toString())),
+      args.groupAccountSeedGroupName,
+    )
+    .accounts({
+      feePayer: args.feePayer,
+      groupAccount: groupAccountPubkey,
+      systemProgram: new web3.PublicKey("11111111111111111111111111111111"),
+    })
+    .remainingAccounts(remainingAccounts);
+};
+
+/**
+ * ### Returns a {@link web3.TransactionInstruction}
+ * Creates a new group with initial members and balances.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ * 2. `[]` system_program: {@link PublicKey} Auto-generated, for account initialization
+ *
+ * Data:
+ * - group_name: {@link string} The name of the group.
+ * - members: {@link PublicKey[]} Array of member public keys.
+ * - initial_balances: {@link BigInt[]} Array of initial balances for each member.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+export const createGroup = (
+	args: CreateGroupArgs,
+	remainingAccounts: Array<web3.AccountMeta> = [],
+): Promise<web3.TransactionInstruction> =>
+    createGroupBuilder(args, remainingAccounts).instruction();
+
+/**
+ * ### Returns a {@link web3.TransactionSignature}
+ * Creates a new group with initial members and balances.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ * 2. `[]` system_program: {@link PublicKey} Auto-generated, for account initialization
+ *
+ * Data:
+ * - group_name: {@link string} The name of the group.
+ * - members: {@link PublicKey[]} Array of member public keys.
+ * - initial_balances: {@link BigInt[]} Array of initial balances for each member.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+export const createGroupSendAndConfirm = async (
+  args: Omit<CreateGroupArgs, "feePayer"> & {
+    signers: {
+      feePayer: web3.Signer,
+    },
+  },
+  remainingAccounts: Array<web3.AccountMeta> = [],
+): Promise<web3.TransactionSignature> => {
+  const preInstructions: Array<web3.TransactionInstruction> = [];
+
+
+  return createGroupBuilder({
+      ...args,
+      feePayer: args.signers.feePayer.publicKey,
+    }, remainingAccounts)
+    .preInstructions(preInstructions)
+    .signers([args.signers.feePayer])
+    .rpc();
+}
+
+export type AddMemberArgs = {
+  feePayer: web3.PublicKey;
+  newMember: web3.PublicKey;
+  groupAccountSeedGroupName: string;
+};
+
+/**
+ * ### Returns a {@link MethodsBuilder}
+ * Adds a new member to the group.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ *
+ * Data:
+ * - new_member: {@link PublicKey} Public key of the new member.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+export const addMemberBuilder = (
+	args: AddMemberArgs,
+	remainingAccounts: Array<web3.AccountMeta> = [],
+): MethodsBuilder<ExpenseSplitter, never> => {
+    const [groupAccountPubkey] = pda.deriveGroupAccountPDA({
+        groupName: args.groupAccountSeedGroupName,
+    }, _program.programId);
+
+  return _program
+    .methods
+    .addMember(
+      args.newMember,
+      args.groupAccountSeedGroupName,
+    )
+    .accounts({
+      feePayer: args.feePayer,
+      groupAccount: groupAccountPubkey,
+    })
+    .remainingAccounts(remainingAccounts);
+};
+
+/**
+ * ### Returns a {@link web3.TransactionInstruction}
+ * Adds a new member to the group.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ *
+ * Data:
+ * - new_member: {@link PublicKey} Public key of the new member.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+export const addMember = (
+	args: AddMemberArgs,
+	remainingAccounts: Array<web3.AccountMeta> = [],
+): Promise<web3.TransactionInstruction> =>
+    addMemberBuilder(args, remainingAccounts).instruction();
+
+/**
+ * ### Returns a {@link web3.TransactionSignature}
+ * Adds a new member to the group.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ *
+ * Data:
+ * - new_member: {@link PublicKey} Public key of the new member.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+export const addMemberSendAndConfirm = async (
+  args: Omit<AddMemberArgs, "feePayer"> & {
+    signers: {
+      feePayer: web3.Signer,
+    },
+  },
+  remainingAccounts: Array<web3.AccountMeta> = [],
+): Promise<web3.TransactionSignature> => {
+  const preInstructions: Array<web3.TransactionInstruction> = [];
+
+
+  return addMemberBuilder({
+      ...args,
+      feePayer: args.signers.feePayer.publicKey,
+    }, remainingAccounts)
+    .preInstructions(preInstructions)
+    .signers([args.signers.feePayer])
+    .rpc();
+}
+
+export type RemoveMemberArgs = {
+  feePayer: web3.PublicKey;
+  member: web3.PublicKey;
+  groupAccountSeedGroupName: string;
+};
+
+/**
+ * ### Returns a {@link MethodsBuilder}
+ * Removes a member from the group.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ *
+ * Data:
+ * - member: {@link PublicKey} Public key of the member to remove.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+export const removeMemberBuilder = (
+	args: RemoveMemberArgs,
+	remainingAccounts: Array<web3.AccountMeta> = [],
+): MethodsBuilder<ExpenseSplitter, never> => {
+    const [groupAccountPubkey] = pda.deriveGroupAccountPDA({
+        groupName: args.groupAccountSeedGroupName,
+    }, _program.programId);
+
+  return _program
+    .methods
+    .removeMember(
+      args.member,
+      args.groupAccountSeedGroupName,
+    )
+    .accounts({
+      feePayer: args.feePayer,
+      groupAccount: groupAccountPubkey,
+    })
+    .remainingAccounts(remainingAccounts);
+};
+
+/**
+ * ### Returns a {@link web3.TransactionInstruction}
+ * Removes a member from the group.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ *
+ * Data:
+ * - member: {@link PublicKey} Public key of the member to remove.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+export const removeMember = (
+	args: RemoveMemberArgs,
+	remainingAccounts: Array<web3.AccountMeta> = [],
+): Promise<web3.TransactionInstruction> =>
+    removeMemberBuilder(args, remainingAccounts).instruction();
+
+/**
+ * ### Returns a {@link web3.TransactionSignature}
+ * Removes a member from the group.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ *
+ * Data:
+ * - member: {@link PublicKey} Public key of the member to remove.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+export const removeMemberSendAndConfirm = async (
+  args: Omit<RemoveMemberArgs, "feePayer"> & {
+    signers: {
+      feePayer: web3.Signer,
+    },
+  },
+  remainingAccounts: Array<web3.AccountMeta> = [],
+): Promise<web3.TransactionSignature> => {
+  const preInstructions: Array<web3.TransactionInstruction> = [];
+
+
+  return removeMemberBuilder({
+      ...args,
+      feePayer: args.signers.feePayer.publicKey,
+    }, remainingAccounts)
+    .preInstructions(preInstructions)
+    .signers([args.signers.feePayer])
+    .rpc();
+}
+
+export type LogPaymentArgs = {
+  feePayer: web3.PublicKey;
+  title: string;
+  participants: web3.PublicKey[];
+  amounts: bigint[];
+  participationFactors: bigint[];
+  groupAccountSeedGroupName: string;
+};
+
+/**
+ * ### Returns a {@link MethodsBuilder}
+ * Logs a payment made by or for group members, updating balances accordingly.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ *
+ * Data:
+ * - title: {@link string} Title or description of the payment.
+ * - participants: {@link PublicKey[]} Array of participating member public keys.
+ * - amounts: {@link BigInt[]} Array of amounts each participant gave to the group.
+ * - participation_factors: {@link BigInt[]} Array of participation factors for each participant.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+export const logPaymentBuilder = (
+	args: LogPaymentArgs,
+	remainingAccounts: Array<web3.AccountMeta> = [],
+): MethodsBuilder<ExpenseSplitter, never> => {
+    const [groupAccountPubkey] = pda.deriveGroupAccountPDA({
+        groupName: args.groupAccountSeedGroupName,
+    }, _program.programId);
+
+  return _program
+    .methods
+    .logPayment(
+      args.title,
+      args.participants,
+      args.amounts.map(e => new BN(e.toString())),
+      args.participationFactors.map(e => new BN(e.toString())),
+      args.groupAccountSeedGroupName,
+    )
+    .accounts({
+      feePayer: args.feePayer,
+      groupAccount: groupAccountPubkey,
+    })
+    .remainingAccounts(remainingAccounts);
+};
+
+/**
+ * ### Returns a {@link web3.TransactionInstruction}
+ * Logs a payment made by or for group members, updating balances accordingly.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ *
+ * Data:
+ * - title: {@link string} Title or description of the payment.
+ * - participants: {@link PublicKey[]} Array of participating member public keys.
+ * - amounts: {@link BigInt[]} Array of amounts each participant gave to the group.
+ * - participation_factors: {@link BigInt[]} Array of participation factors for each participant.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+export const logPayment = (
+	args: LogPaymentArgs,
+	remainingAccounts: Array<web3.AccountMeta> = [],
+): Promise<web3.TransactionInstruction> =>
+    logPaymentBuilder(args, remainingAccounts).instruction();
+
+/**
+ * ### Returns a {@link web3.TransactionSignature}
+ * Logs a payment made by or for group members, updating balances accordingly.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ *
+ * Data:
+ * - title: {@link string} Title or description of the payment.
+ * - participants: {@link PublicKey[]} Array of participating member public keys.
+ * - amounts: {@link BigInt[]} Array of amounts each participant gave to the group.
+ * - participation_factors: {@link BigInt[]} Array of participation factors for each participant.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+export const logPaymentSendAndConfirm = async (
+  args: Omit<LogPaymentArgs, "feePayer"> & {
+    signers: {
+      feePayer: web3.Signer,
+    },
+  },
+  remainingAccounts: Array<web3.AccountMeta> = [],
+): Promise<web3.TransactionSignature> => {
+  const preInstructions: Array<web3.TransactionInstruction> = [];
+
+
+  return logPaymentBuilder({
+      ...args,
+      feePayer: args.signers.feePayer.publicKey,
+    }, remainingAccounts)
+    .preInstructions(preInstructions)
+    .signers([args.signers.feePayer])
+    .rpc();
+}
+
+// Getters
+
+export const getGroupAccount = (
+    publicKey: web3.PublicKey,
+    commitment?: web3.Commitment
+): Promise<IdlAccounts<ExpenseSplitter>["groupAccount"]> => _program.account.groupAccount.fetch(publicKey, commitment);
diff --git a/examples/solana_anchor/expenses_splitting/program/migrations/deploy.ts b/examples/solana_anchor/expenses_splitting/program/migrations/deploy.ts
new file mode 100644
index 0000000..82fb175
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/migrations/deploy.ts
@@ -0,0 +1,12 @@
+// Migrations are an early feature. Currently, they're nothing more than this
+// single deploy script that's invoked from the CLI, injecting a provider
+// configured from the workspace's Anchor.toml.
+
+const anchor = require("@coral-xyz/anchor");
+
+module.exports = async function (provider) {
+  // Configure client to use the provider.
+  anchor.setProvider(provider);
+
+  // Add your deploy script here.
+};
diff --git a/examples/solana_anchor/expenses_splitting/program/package.json b/examples/solana_anchor/expenses_splitting/program/package.json
new file mode 100644
index 0000000..00b41c1
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/package.json
@@ -0,0 +1,20 @@
+{
+    "scripts": {
+        "lint:fix": "prettier */*.js \"*/**/*{.js,.ts}\" -w",
+        "lint": "prettier */*.js \"*/**/*{.js,.ts}\" --check"
+    },
+    "dependencies": {
+        "@coral-xyz/anchor": "^0.29.0"
+    },
+    "devDependencies": {
+        "chai": "^4.3.4",
+        "mocha": "^9.0.3",
+		"chai-as-promised": "^7.1.1",
+        "ts-mocha": "^10.0.0",
+        "@types/bn.js": "^5.1.0",
+        "@types/chai": "^4.3.0",
+        "@types/mocha": "^9.0.0",
+        "typescript": "^4.3.5",
+        "prettier": "^2.6.2"
+    }
+}
diff --git a/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/Cargo.toml b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/Cargo.toml
new file mode 100644
index 0000000..0589e02
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/Cargo.toml
@@ -0,0 +1,24 @@
+[package]
+name = "ExpenseSplitter"
+version = "1.0.0"
+description = """
+A contract for managing group expenses, allowing members to split costs fairly."""
+
+edition = "2021"
+
+[lib]
+crate-type = ["cdylib", "lib"]
+name = "ExpenseSplitter"
+
+[features]
+no-entrypoint = []
+no-idl = []
+no-log-ix-name = []
+cpi = ["no-entrypoint"]
+default = []
+
+[dependencies]
+anchor-lang = "0.29.0"
+solana-program = "=1.17.0"
+ahash = "=0.8.6"
+bumpalo = "=3.14.0"
diff --git a/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/Xargo.toml b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/Xargo.toml
new file mode 100644
index 0000000..b6ef8f6
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/Xargo.toml
@@ -0,0 +1,5 @@
+# This file is auto-generated from the CIDL source.
+# Editing this file directly is not recommended as it may be overwritten.
+
+[target.bpfel-unknown-unknown.dependencies.std]
+features = []
diff --git a/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/constants.rs b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/constants.rs
new file mode 100644
index 0000000..fae4535
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/constants.rs
@@ -0,0 +1,4 @@
+use anchor_lang::prelude::*;
+
+#[constant]
+pub const SEED: &str = "anchor";
diff --git a/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/error.rs b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/error.rs
new file mode 100644
index 0000000..3d6fbdd
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/error.rs
@@ -0,0 +1,18 @@
+// This file is auto-generated from the CIDL source.
+// Editing this file directly is not recommended as it may be overwritten.
+//
+// Docs: https://docs.codigo.ai/c%C3%B3digo-interface-description-language/specification#errors
+
+use anchor_lang::prelude::*;
+
+#[error_code]
+pub enum ExpenseSplitterError {
+	#[msg("The sum of balances in the group must always sum to zero.")]
+	GroupBalanceError,
+	#[msg("The specified member does not exist in the group.")]
+	InvalidMemberError,
+	#[msg("The specified group does not exist.")]
+	InvalidGroupError,
+	#[msg("The sum of initial balances does not sum to zero.")]
+	BalanceMismatchError,
+}
diff --git a/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/instructions/add_member.rs b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/instructions/add_member.rs
new file mode 100644
index 0000000..9b91375
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/instructions/add_member.rs
@@ -0,0 +1,30 @@
+use crate::*;
+use anchor_lang::prelude::*;
+
+/// Adds a new member to the group.
+///
+/// Accounts:
+/// 0. `[writable, signer]` fee_payer: [AccountInfo] Auto-generated, default fee payer
+/// 1. `[writable]` group_account: [GroupAccount]
+///
+/// Data:
+/// - new_member: [Pubkey] Public key of the new member.
+/// - group_account_seed_group_name: [String] Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+pub fn handler(ctx: Context<AddMember>, new_member: Pubkey) -> Result<()> {
+    let group_account = &mut ctx.accounts.group_account;
+
+    assert!(
+        group_account.members.contains(&group_account.key()),
+        "only group members can add new members to the group account"
+    );
+
+    assert!(
+        !group_account.members.contains(&new_member),
+        "provided new member is already a member of this group"
+    );
+
+    group_account.members.push(new_member);
+    group_account.balances.push(0);
+
+    Ok(())
+}
diff --git a/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/instructions/create_group.rs b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/instructions/create_group.rs
new file mode 100644
index 0000000..fc5c725
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/instructions/create_group.rs
@@ -0,0 +1,44 @@
+use crate::*;
+use anchor_lang::prelude::*;
+
+/// Creates a new group with initial members and balances.
+///
+/// Accounts:
+/// 0. `[writable, signer]` fee_payer: [AccountInfo] Auto-generated, default fee payer
+/// 1. `[writable]` group_account: [GroupAccount]
+/// 2. `[]` system_program: [AccountInfo] Auto-generated, for account initialization
+///
+/// Data:
+/// - group_name: [String] The name of the group.
+/// - members: [Vec<Pubkey>] Array of member public keys.
+/// - initial_balances: [Vec<i64>] Array of initial balances for each member.
+/// - group_account_seed_group_name: [String] Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+pub fn handler(
+    ctx: Context<CreateGroup>,
+    group_name: String,
+    members: Vec<Pubkey>,
+    initial_balances: Vec<i64>,
+) -> Result<()> {
+    assert!(
+        members.len() > 0,
+        "members list should provide at least one address"
+    );
+
+    assert!(
+        initial_balances.len() == members.len(),
+        "members and initial balances lists should be of equal size"
+    );
+
+    assert!(
+        initial_balances.iter().sum::<i64>() == 0,
+        "initial balances should sum zero"
+    );
+
+    let group_account = &mut ctx.accounts.group_account;
+
+    group_account.group_name = group_name;
+    group_account.members = members;
+    group_account.balances = initial_balances;
+
+    Ok(())
+}
diff --git a/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/instructions/log_payment.rs b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/instructions/log_payment.rs
new file mode 100644
index 0000000..927d46f
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/instructions/log_payment.rs
@@ -0,0 +1,89 @@
+use crate::*;
+use anchor_lang::prelude::*;
+
+/// Logs a payment made by or for group members, updating balances accordingly.
+///
+/// Accounts:
+/// 0. `[writable, signer]` fee_payer: [AccountInfo] Auto-generated, default fee payer
+/// 1. `[writable]` group_account: [GroupAccount]
+///
+/// Data:
+/// - title: [String] Title or description of the payment.
+/// - participants: [Vec<Pubkey>] Array of participating member public keys.
+/// - amounts: [Vec<u64>] Array of amounts each participant gave to the group.
+/// - participation_factors: [Vec<u64>] Array of participation factors for each participant.
+/// - group_account_seed_group_name: [String] Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+pub fn handler(
+    ctx: Context<LogPayment>,
+    title: String,
+    participants: Vec<Pubkey>,
+    amounts: Vec<u64>,
+    participation_factors: Vec<u64>,
+) -> Result<()> {
+    let group_account = &mut ctx.accounts.group_account;
+
+    assert!(
+        group_account.members.contains(&group_account.key()),
+        "only group members can log payments in the group account"
+    );
+
+    assert!(
+        participants.len() > 0,
+        "participants list should provide at least one address"
+    );
+    assert!(
+        participants.len() == amounts.len(),
+        "participants and amounts lists should be of equal size"
+    );
+    assert!(
+        participants.len() == participation_factors.len(),
+        "participants and participation factors lists should be of equal size"
+    );
+
+    let total_amount: u64 = amounts.iter().sum();
+    let total_participation: u64 = participation_factors.iter().sum();
+
+    assert!(
+        total_participation > 0,
+        "participation factors sum should be greater than zero"
+    );
+
+    for (participant_idx, participant_address) in participants.iter().enumerate() {
+        // payment log participant addresses could be in any order, we need to match them with group account members order
+        let member_idx = group_account
+            .members
+            .iter()
+            .position(|&member_address| member_address == *participant_address)
+            .expect(
+                format!(
+                    "participant {} is not a member of this group",
+                    participant_address
+                )
+                .as_str(),
+            );
+
+        // high-level formula: member balance += payment - total expenditure * participation
+        let expenditure =
+            total_amount * participation_factors[participant_idx] / total_participation;
+
+        group_account.balances[member_idx] += (amounts[participant_idx] - expenditure) as i64;
+
+        msg!(
+            "Group '{}' payment '{}' of {:?}. Member {} spended {:?} and paid {:?}",
+            group_account.group_name,
+            title,
+            total_amount,
+            participant_address,
+            expenditure,
+            amounts[participant_idx]
+        );
+    }
+
+    // just in case
+    assert!(
+        group_account.balances.iter().sum::<i64>() == 0,
+        "group balances should sum zero, something went wrong"
+    );
+
+    Ok(())
+}
diff --git a/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/instructions/mod.rs b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/instructions/mod.rs
new file mode 100644
index 0000000..d972675
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/instructions/mod.rs
@@ -0,0 +1,12 @@
+// This file is auto-generated from the CIDL source.
+// Editing this file directly is not recommended as it may be overwritten.
+
+pub mod create_group;
+pub mod add_member;
+pub mod remove_member;
+pub mod log_payment;
+
+pub use create_group::*;
+pub use add_member::*;
+pub use remove_member::*;
+pub use log_payment::*;
diff --git a/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/instructions/remove_member.rs b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/instructions/remove_member.rs
new file mode 100644
index 0000000..7e350a2
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/instructions/remove_member.rs
@@ -0,0 +1,36 @@
+use crate::*;
+use anchor_lang::prelude::*;
+
+/// Removes a member from the group.
+///
+/// Accounts:
+/// 0. `[writable, signer]` fee_payer: [AccountInfo] Auto-generated, default fee payer
+/// 1. `[writable]` group_account: [GroupAccount]
+///
+/// Data:
+/// - member: [Pubkey] Public key of the member to remove.
+/// - group_account_seed_group_name: [String] Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+pub fn handler(ctx: Context<RemoveMember>, member: Pubkey) -> Result<()> {
+    let group_account = &mut ctx.accounts.group_account;
+
+    assert!(
+        group_account.members.contains(&group_account.key()),
+        "only group members can remove members from the group account"
+    );
+
+    let member_idx = group_account
+        .members
+        .iter()
+        .position(|&address| address == member)
+        .expect("could not find member to remove within this group");
+
+    assert!(
+        group_account.balances[member_idx] == 0,
+        "member balance should be zero before removal"
+    );
+
+    group_account.members.remove(member_idx);
+    group_account.balances.remove(member_idx);
+
+    Ok(())
+}
diff --git a/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/lib.rs b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/lib.rs
new file mode 100644
index 0000000..b0b467d
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/lib.rs
@@ -0,0 +1,177 @@
+// This file is auto-generated from the CIDL source.
+// Editing this file directly is not recommended as it may be overwritten.
+
+pub mod constants;
+pub mod error;
+pub mod instructions;
+pub mod state;
+
+use anchor_lang::prelude::*;
+use std::str::FromStr;
+
+pub use constants::*;
+pub use instructions::*;
+pub use state::*;
+
+declare_id!("CBdZHhteKeEySFipeE9w2zRsigs3CsGyFEQ9UKwEpfJ5");
+
+#[program]
+pub mod ExpenseSplitter {
+    use super::*;
+
+/// Creates a new group with initial members and balances.
+///
+/// Accounts:
+/// 0. `[writable, signer]` fee_payer: [AccountInfo] Auto-generated, default fee payer
+/// 1. `[writable]` group_account: [GroupAccount] 
+/// 2. `[]` system_program: [AccountInfo] Auto-generated, for account initialization
+///
+/// Data:
+/// - group_name: [String] The name of the group.
+/// - members: [Vec<Pubkey>] Array of member public keys.
+/// - initial_balances: [Vec<i64>] Array of initial balances for each member.
+/// - group_account_seed_group_name: [String] Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+	pub fn create_group(ctx: Context<CreateGroup>, group_name: String, members: Vec<Pubkey>, initial_balances: Vec<i64>, _group_account_seed_group_name: String) -> Result<()> {
+		create_group::handler(ctx, group_name, members, initial_balances)
+	}
+
+/// Adds a new member to the group.
+///
+/// Accounts:
+/// 0. `[writable, signer]` fee_payer: [AccountInfo] Auto-generated, default fee payer
+/// 1. `[writable]` group_account: [GroupAccount] 
+///
+/// Data:
+/// - new_member: [Pubkey] Public key of the new member.
+/// - group_account_seed_group_name: [String] Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+	pub fn add_member(ctx: Context<AddMember>, new_member: Pubkey, _group_account_seed_group_name: String) -> Result<()> {
+		add_member::handler(ctx, new_member)
+	}
+
+/// Removes a member from the group.
+///
+/// Accounts:
+/// 0. `[writable, signer]` fee_payer: [AccountInfo] Auto-generated, default fee payer
+/// 1. `[writable]` group_account: [GroupAccount] 
+///
+/// Data:
+/// - member: [Pubkey] Public key of the member to remove.
+/// - group_account_seed_group_name: [String] Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+	pub fn remove_member(ctx: Context<RemoveMember>, member: Pubkey, _group_account_seed_group_name: String) -> Result<()> {
+		remove_member::handler(ctx, member)
+	}
+
+/// Logs a payment made by or for group members, updating balances accordingly.
+///
+/// Accounts:
+/// 0. `[writable, signer]` fee_payer: [AccountInfo] Auto-generated, default fee payer
+/// 1. `[writable]` group_account: [GroupAccount] 
+///
+/// Data:
+/// - title: [String] Title or description of the payment.
+/// - participants: [Vec<Pubkey>] Array of participating member public keys.
+/// - amounts: [Vec<u64>] Array of amounts each participant gave to the group.
+/// - participation_factors: [Vec<u64>] Array of participation factors for each participant.
+/// - group_account_seed_group_name: [String] Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+	pub fn log_payment(ctx: Context<LogPayment>, title: String, participants: Vec<Pubkey>, amounts: Vec<u64>, participation_factors: Vec<u64>, _group_account_seed_group_name: String) -> Result<()> {
+		log_payment::handler(ctx, title, participants, amounts, participation_factors)
+	}
+
+
+	#[derive(Accounts)]
+	#[instruction(
+		group_name: String,
+		members: Vec<Pubkey>,
+		initial_balances: Vec<i64>,
+		group_account_seed_group_name: String,
+	)]
+	pub struct CreateGroup<'info> {
+		#[account(
+			mut,
+			owner=Pubkey::from_str("11111111111111111111111111111111").unwrap(),
+		)]
+		pub fee_payer: Signer<'info>,
+
+		#[account(
+			init,
+			space=4120,
+			payer=fee_payer,
+			seeds = [
+				group_account_seed_group_name.as_bytes().as_ref(),
+			],
+			bump,
+		)]
+		pub group_account: Account<'info, GroupAccount>,
+
+		pub system_program: Program<'info, System>,
+	}
+
+	#[derive(Accounts)]
+	#[instruction(
+		new_member: Pubkey,
+		group_account_seed_group_name: String,
+	)]
+	pub struct AddMember<'info> {
+		#[account(
+			mut,
+			owner=Pubkey::from_str("11111111111111111111111111111111").unwrap(),
+		)]
+		pub fee_payer: Signer<'info>,
+
+		#[account(
+			mut,
+			seeds = [
+				group_account_seed_group_name.as_bytes().as_ref(),
+			],
+			bump,
+		)]
+		pub group_account: Account<'info, GroupAccount>,
+	}
+
+	#[derive(Accounts)]
+	#[instruction(
+		member: Pubkey,
+		group_account_seed_group_name: String,
+	)]
+	pub struct RemoveMember<'info> {
+		#[account(
+			mut,
+			owner=Pubkey::from_str("11111111111111111111111111111111").unwrap(),
+		)]
+		pub fee_payer: Signer<'info>,
+
+		#[account(
+			mut,
+			seeds = [
+				group_account_seed_group_name.as_bytes().as_ref(),
+			],
+			bump,
+		)]
+		pub group_account: Account<'info, GroupAccount>,
+	}
+
+	#[derive(Accounts)]
+	#[instruction(
+		title: String,
+		participants: Vec<Pubkey>,
+		amounts: Vec<u64>,
+		participation_factors: Vec<u64>,
+		group_account_seed_group_name: String,
+	)]
+	pub struct LogPayment<'info> {
+		#[account(
+			mut,
+			owner=Pubkey::from_str("11111111111111111111111111111111").unwrap(),
+		)]
+		pub fee_payer: Signer<'info>,
+
+		#[account(
+			mut,
+			seeds = [
+				group_account_seed_group_name.as_bytes().as_ref(),
+			],
+			bump,
+		)]
+		pub group_account: Account<'info, GroupAccount>,
+	}
+}
diff --git a/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/state/group_account.rs b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/state/group_account.rs
new file mode 100644
index 0000000..feb24ab
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/state/group_account.rs
@@ -0,0 +1,11 @@
+// This file is auto-generated from the CIDL source.
+// Editing this file directly is not recommended as it may be overwritten.
+
+use anchor_lang::prelude::*;
+
+#[account]
+pub struct GroupAccount {
+	pub group_name: String,
+	pub members: Vec<Pubkey>,
+	pub balances: Vec<i64>,
+}
diff --git a/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/state/mod.rs b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/state/mod.rs
new file mode 100644
index 0000000..45eb81c
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/programs/ExpenseSplitter/src/state/mod.rs
@@ -0,0 +1,8 @@
+// This file is auto-generated from the CIDL source.
+// Editing this file directly is not recommended as it may be overwritten.
+
+use anchor_lang::prelude::*;
+
+pub mod group_account;
+
+pub use group_account::*;
diff --git a/examples/solana_anchor/expenses_splitting/program/tests/expense_splitter.ts b/examples/solana_anchor/expenses_splitting/program/tests/expense_splitter.ts
new file mode 100644
index 0000000..b7e6250
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/tests/expense_splitter.ts
@@ -0,0 +1,22 @@
+
+import { AnchorProvider, BN, setProvider, web3 } from "@coral-xyz/anchor";
+import * as expenseSplitterClient from "../app/program_client";
+import chai from "chai";
+import { assert, expect } from "chai";
+import chaiAsPromised from "chai-as-promised";
+import NodeWallet from "@coral-xyz/anchor/dist/cjs/nodewallet";
+chai.use(chaiAsPromised);
+
+const programId = new web3.PublicKey("CBdZHhteKeEySFipeE9w2zRsigs3CsGyFEQ9UKwEpfJ5");
+
+describe("expense_splitter tests", () => {
+  // Configure the client to use the local cluster
+  const provider = anchor.AnchorProvider.env();
+  anchor.setProvider(provider);
+
+  const systemWallet = (provider.wallet as NodeWallet).payer;
+
+  it("First test", async () => {
+    // Add your test here
+  });
+});
diff --git a/examples/solana_anchor/expenses_splitting/program/tsconfig.json b/examples/solana_anchor/expenses_splitting/program/tsconfig.json
new file mode 100644
index 0000000..b7b6454
--- /dev/null
+++ b/examples/solana_anchor/expenses_splitting/program/tsconfig.json
@@ -0,0 +1,11 @@
+{
+	"compilerOptions": {
+	  "types": ["mocha", "chai"],
+	  "typeRoots": ["./node_modules/@types"],
+	  "lib": ["es2015"],
+	  "module": "commonjs",
+	  "target": "es6",
+	  "esModuleInterop": true,
+	  "resolveJsonModule": true
+	}
+}
diff --git a/examples/solana_native/expenses_splitting/README.md b/examples/solana_native/expenses_splitting/README.md
new file mode 100644
index 0000000..87e8f5a
--- /dev/null
+++ b/examples/solana_native/expenses_splitting/README.md
@@ -0,0 +1,67 @@
+# Expenses splitting
+
+This program does expenses splitting on Solana. The program manages group accounts.
+Anyone can create a group by providing addresses and initial balances. The group account holds balances for each of its members.
+The sum of balances of a group always sum zero.
+Members can log payments by providing addresses, payments and participation factors.
+Group members can add and remove members.
+
+# Program template
+
+Template that includes the CIDL, and the generated code with its business logic.
+
+Creates a user, and tracks the income and outcome amount per user
+
+## Generate code
+
+```shell
+codigo solana generate cidl.yaml
+```
+
+## Build contract
+
+From within the program directory
+
+```shell
+cargo build-sbf
+```
+
+## Run solana validator
+
+From another terminal (keep it open after running the command)
+
+```shell
+solana-test-validator
+```
+
+## Deploy to validator
+
+From within the program directory
+
+```shell
+solana program deploy target/deploy/validate_expenses_splitting.so --program-id ../expenses_splitting_kp.josn
+```
+
+## Install program client dependencies
+
+From within the program_client directory
+
+```shell
+npm install
+```
+
+## Install ts-node for running `app.ts`
+
+From within the program_client directory
+
+```shell
+npm install --save-dev ts-node
+```
+
+## Run client
+
+From within the program_client directory
+
+```shell
+npx ts-node app.ts
+```
diff --git a/examples/solana_native/expenses_splitting/cidl.yaml b/examples/solana_native/expenses_splitting/cidl.yaml
new file mode 100644
index 0000000..9e15978
--- /dev/null
+++ b/examples/solana_native/expenses_splitting/cidl.yaml
@@ -0,0 +1,112 @@
+cidl: "0.9"
+info:
+  name: ExpenseSplitter
+  title: Expense Splitter Contract
+  version: "1.0.0"
+  summary: A contract for managing group expenses, allowing members to split costs fairly.
+  contact:
+    name: "Developer Name"
+    web: "https://developerwebsite.com"
+    email: "contact@developerwebsite.com"
+    git: "https://github.com/developer/ExpenseSplitter"
+  license:
+    name: "MIT License"
+    identifier: "MIT"
+    url: "https://opensource.org/licenses/MIT"
+
+solana:
+  seeds:
+    groupAccount:
+      items:
+        - name: "group_name"
+          type: "string"
+
+types:
+  GroupAccount:
+    summary: Represents a group account with members and their balances.
+    fields:
+      - name: "group_name"
+        type: "string"
+        description: "The name of the group."
+        attributes: [cap=100]
+      - name: "members"
+        type: "array<sol:pubkey>"
+        description: "Array of member public keys."
+        attributes: [cap=100]
+      - name: "balances"
+        type: "array<i64>"
+        description: "Array of member balances in lamports."
+        attributes: [cap=100]
+    
+methods:
+  - name: "createGroup"
+    summary: "Creates a new group with initial members and balances."
+    inputs:
+      - name: "group_account"
+        type: sol:account<GroupAccount, seeds.groupAccount(signer=fee_payer)>
+        attributes: [ sol:init ]
+      - name: "group_name"
+        type: "string"
+        description: "The name of the group."
+      - name: "members"
+        type: "array<sol:pubkey>"
+        description: "Array of member public keys."
+        attributes: [cap=100]
+      - name: "initial_balances"
+        type: "array<i64>"
+        description: "Array of initial balances for each member."
+        attributes: [cap=100]
+    solana:
+      default-payer: true
+
+  - name: "addMember"
+    summary: "Adds a new member to the group."
+    inputs:
+      - name: "group_account"
+        type: sol:account<GroupAccount, seeds.groupAccount(signer=fee_payer)>
+        attributes: [sol:writable]
+      - name: "new_member"
+        type: "sol:pubkey"
+        description: "Public key of the new member."
+
+  - name: "removeMember"
+    summary: "Removes a member from the group."
+    inputs:
+      - name: "group_account"
+        type: sol:account<GroupAccount, seeds.groupAccount(signer=fee_payer)>
+        attributes: [sol:writable]
+      - name: "member"
+        type: "sol:pubkey"
+        description: "Public key of the member to remove."
+
+  - name: "logPayment"
+    summary: "Logs a payment made by or for group members, updating balances accordingly."
+    inputs:
+      - name: "group_account"
+        type: sol:account<GroupAccount, seeds.groupAccount(signer=fee_payer)>
+        attributes: [sol:writable]
+      - name: "title"
+        type: "string"
+        description: "Title or description of the payment."
+      - name: "participants"
+        type: "array<sol:pubkey>"
+        description: "Array of participating member public keys."
+        attributes: [cap=100]
+      - name: "amounts"
+        type: "array<u64>"
+        description: "Array of amounts each participant gave to the group."
+        attributes: [cap=100]
+      - name: "participation_factors"
+        type: "array<u64>"
+        description: "Array of participation factors for each participant."
+        attributes: [cap=100]
+
+errors:
+  - id: "GroupBalanceError"
+    msg: "The sum of balances in the group must always sum to zero."
+  - id: "InvalidMemberError"
+    msg: "The specified member does not exist in the group."
+  - id: "InvalidGroupError"
+    msg: "The specified group does not exist."
+  - id: "BalanceMismatchError"
+    msg: "The sum of initial balances does not sum to zero."
\ No newline at end of file
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new file mode 100644
index 0000000..e787227
--- /dev/null
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diff --git a/examples/solana_native/expenses_splitting/program/Cargo.toml b/examples/solana_native/expenses_splitting/program/Cargo.toml
new file mode 100644
index 0000000..b6f648e
--- /dev/null
+++ b/examples/solana_native/expenses_splitting/program/Cargo.toml
@@ -0,0 +1,30 @@
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+ahash = "=0.8.6"
+toml_edit = "=0.21.0"
+
+
+
+[lib]
+crate-type = ["cdylib", "lib"]
+path = "./lib.rs"
\ No newline at end of file
diff --git a/examples/solana_native/expenses_splitting/program/generated/entrypoint.rs b/examples/solana_native/expenses_splitting/program/generated/entrypoint.rs
new file mode 100644
index 0000000..9f3ea76
--- /dev/null
+++ b/examples/solana_native/expenses_splitting/program/generated/entrypoint.rs
@@ -0,0 +1,24 @@
+// This file is auto-generated from the CIDL source.
+// Editing this file directly is not recommended as it may be overwritten.
+
+use crate::generated::errors::ExpenseSplitterError;
+use crate::generated::processor::Processor;
+use solana_program::program_error::PrintProgramError;
+use solana_program::{
+    account_info::AccountInfo, entrypoint, entrypoint::ProgramResult, pubkey::Pubkey,
+};
+
+entrypoint!(process_instruction);
+
+pub fn process_instruction(
+    program_id: &Pubkey,
+    accounts: &[AccountInfo],
+    data: &[u8],
+) -> ProgramResult {
+    if let Err(error) = Processor::process(program_id, accounts, data) {
+        // catch the error so we can print it
+        error.print::<ExpenseSplitterError>();
+        return Err(error);
+    }
+    Ok(())
+}
\ No newline at end of file
diff --git a/examples/solana_native/expenses_splitting/program/generated/errors.rs b/examples/solana_native/expenses_splitting/program/generated/errors.rs
new file mode 100644
index 0000000..91b6021
--- /dev/null
+++ b/examples/solana_native/expenses_splitting/program/generated/errors.rs
@@ -0,0 +1,82 @@
+// This file is auto-generated from the CIDL source.
+// Editing this file directly is not recommended as it may be overwritten.
+
+use num_derive::FromPrimitive;
+use solana_program::decode_error::DecodeError;
+use solana_program::msg;
+use solana_program::program_error::{PrintProgramError, ProgramError};
+use thiserror::Error;
+
+#[derive(Error, FromPrimitive, Debug, Clone)]
+pub enum ExpenseSplitterError {
+    #[error("Invalid Instruction")]
+    InvalidInstruction,
+
+    #[error("Invalid Signer Permission")]
+    InvalidSignerPermission,
+
+    #[error("Not The Expected Account Address")]
+    NotExpectedAddress,
+
+    #[error("Wrong Account Owner")]
+    WrongAccountOwner,
+
+    #[error("Invalid Account Len")]
+    InvalidAccountLen,
+
+    #[error("Executable Account Expected")]
+    ExecutableAccountExpected,
+
+	#[error("Account Already Closed")]
+	AccountAlreadyClosed,
+
+	#[error("GroupBalanceError")]
+	GroupBalanceError
+	#[error("InvalidMemberError")]
+	InvalidMemberError
+	#[error("InvalidGroupError")]
+	InvalidGroupError
+	#[error("BalanceMismatchError")]
+	BalanceMismatchError
+ 
+}
+
+impl From<ExpenseSplitterError> for ProgramError {
+    fn from(e: ExpenseSplitterError) -> Self {
+        ProgramError::Custom(e as u32)
+    }
+}
+
+impl<T> DecodeError<T> for ExpenseSplitterError {
+    fn type_of() -> &'static str {
+        "ExpenseSplitterError"
+    }
+}
+
+impl PrintProgramError for ExpenseSplitterError {
+    fn print<E>(&self)
+    where
+        E: 'static
+            + std::error::Error
+            + DecodeError<E>
+            + PrintProgramError
+            + num_traits::FromPrimitive,
+    {
+        match self {
+            ExpenseSplitterError::InvalidInstruction => msg!("Error: Invalid instruction"),
+            ExpenseSplitterError::InvalidSignerPermission => msg!("Error: The account is_signer value is not the expected one"),
+            ExpenseSplitterError::NotExpectedAddress => {
+                msg!("Error: Not the expected account address")
+            }
+            ExpenseSplitterError::WrongAccountOwner => msg!("Error: Wrong account owner"),
+            ExpenseSplitterError::InvalidAccountLen => msg!("Error: Invalid account length"),
+            ExpenseSplitterError::ExecutableAccountExpected => msg!("Error: Executable account expected"),
+            ExpenseSplitterError::AccountAlreadyClosed => msg!("Error: Account Already Closed"),
+			ExpenseSplitterError::GroupBalanceError => msg!("Error: The sum of balances in the group must always sum to zero."),
+			ExpenseSplitterError::InvalidMemberError => msg!("Error: The specified member does not exist in the group."),
+			ExpenseSplitterError::InvalidGroupError => msg!("Error: The specified group does not exist."),
+			ExpenseSplitterError::BalanceMismatchError => msg!("Error: The sum of initial balances does not sum to zero."),
+ 
+        }
+    }
+}
\ No newline at end of file
diff --git a/examples/solana_native/expenses_splitting/program/generated/instructions.rs b/examples/solana_native/expenses_splitting/program/generated/instructions.rs
new file mode 100644
index 0000000..2c849b1
--- /dev/null
+++ b/examples/solana_native/expenses_splitting/program/generated/instructions.rs
@@ -0,0 +1,104 @@
+// This file is auto-generated from the CIDL source.
+// Editing this file directly is not recommended as it may be overwritten.
+
+use borsh::{BorshDeserialize, BorshSerialize};
+use solana_program::program_error::ProgramError;
+use solana_program::pubkey::Pubkey;
+use crate::generated::errors::ExpenseSplitterError;
+
+#[derive(BorshSerialize, Debug)]
+pub enum ExpenseSplitterInstruction {
+/// Creates a new group with initial members and balances.
+///
+/// Accounts:
+/// 0. `[writable, signer]` fee_payer: [AccountInfo] Auto-generated, default fee payer
+/// 1. `[writable]` group_account: [GroupAccount] 
+/// 2. `[]` system_program: [AccountInfo] Auto-generated, for account initialization
+///
+/// Data:
+/// - group_name: [String] The name of the group.
+/// - members: [Vec<Pubkey>] Array of member public keys.
+/// - initial_balances: [Vec<i64>] Array of initial balances for each member.
+/// - group_account_seed_group_name: [String] Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+	CreateGroup(CreateGroupArgs),
+
+/// Adds a new member to the group.
+///
+/// Accounts:
+/// 0. `[writable, signer]` fee_payer: [AccountInfo] Auto-generated, default fee payer
+/// 1. `[writable]` group_account: [GroupAccount] 
+///
+/// Data:
+/// - new_member: [Pubkey] Public key of the new member.
+/// - group_account_seed_group_name: [String] Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+	AddMember(AddMemberArgs),
+
+/// Removes a member from the group.
+///
+/// Accounts:
+/// 0. `[writable, signer]` fee_payer: [AccountInfo] Auto-generated, default fee payer
+/// 1. `[writable]` group_account: [GroupAccount] 
+///
+/// Data:
+/// - member: [Pubkey] Public key of the member to remove.
+/// - group_account_seed_group_name: [String] Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+	RemoveMember(RemoveMemberArgs),
+
+/// Logs a payment made by or for group members, updating balances accordingly.
+///
+/// Accounts:
+/// 0. `[writable, signer]` fee_payer: [AccountInfo] Auto-generated, default fee payer
+/// 1. `[writable]` group_account: [GroupAccount] 
+///
+/// Data:
+/// - title: [String] Title or description of the payment.
+/// - participants: [Vec<Pubkey>] Array of participating member public keys.
+/// - amounts: [Vec<u64>] Array of amounts each participant gave to the group.
+/// - participation_factors: [Vec<u64>] Array of participation factors for each participant.
+/// - group_account_seed_group_name: [String] Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+	LogPayment(LogPaymentArgs),
+
+}
+
+#[derive(BorshSerialize, BorshDeserialize, Debug)]
+pub struct CreateGroupArgs {
+	pub group_name: String,
+	pub members: Vec<Pubkey>,
+	pub initial_balances: Vec<i64>,
+	pub group_account_seed_group_name: String,
+}
+
+#[derive(BorshSerialize, BorshDeserialize, Debug)]
+pub struct AddMemberArgs {
+	pub new_member: Pubkey,
+	pub group_account_seed_group_name: String,
+}
+
+#[derive(BorshSerialize, BorshDeserialize, Debug)]
+pub struct RemoveMemberArgs {
+	pub member: Pubkey,
+	pub group_account_seed_group_name: String,
+}
+
+#[derive(BorshSerialize, BorshDeserialize, Debug)]
+pub struct LogPaymentArgs {
+	pub title: String,
+	pub participants: Vec<Pubkey>,
+	pub amounts: Vec<u64>,
+	pub participation_factors: Vec<u64>,
+	pub group_account_seed_group_name: String,
+}
+
+impl ExpenseSplitterInstruction {
+    pub fn unpack(input: &[u8]) -> Result<Self, ProgramError> {
+        let (&variant, rest) = input.split_first().ok_or(ExpenseSplitterError::InvalidInstruction)?;
+
+        Ok(match variant {
+			0 => Self::CreateGroup(CreateGroupArgs::try_from_slice(rest).unwrap()),
+			1 => Self::AddMember(AddMemberArgs::try_from_slice(rest).unwrap()),
+			2 => Self::RemoveMember(RemoveMemberArgs::try_from_slice(rest).unwrap()),
+			3 => Self::LogPayment(LogPaymentArgs::try_from_slice(rest).unwrap()),
+			_ => return Err(ExpenseSplitterError::InvalidInstruction.into())
+        })
+    }
+}
\ No newline at end of file
diff --git a/examples/solana_native/expenses_splitting/program/generated/mod.rs b/examples/solana_native/expenses_splitting/program/generated/mod.rs
new file mode 100644
index 0000000..2620865
--- /dev/null
+++ b/examples/solana_native/expenses_splitting/program/generated/mod.rs
@@ -0,0 +1,9 @@
+// This file is auto-generated from the CIDL source.
+// Editing this file directly is not recommended as it may be overwritten.
+
+
+pub mod entrypoint;
+pub mod errors;
+pub mod instructions;
+pub mod processor;
+pub mod state;
\ No newline at end of file
diff --git a/examples/solana_native/expenses_splitting/program/generated/processor.rs b/examples/solana_native/expenses_splitting/program/generated/processor.rs
new file mode 100644
index 0000000..654b19a
--- /dev/null
+++ b/examples/solana_native/expenses_splitting/program/generated/processor.rs
@@ -0,0 +1,399 @@
+// This file is auto-generated from the CIDL source.
+// Editing this file directly is not recommended as it may be overwritten.
+
+use std::str::FromStr;
+use std::ops::DerefMut;
+use borsh::{BorshDeserialize, BorshSerialize};
+use solana_program::borsh0_10::try_from_slice_unchecked;
+use solana_program::account_info::{AccountInfo, next_account_info, next_account_infos};
+use solana_program::entrypoint::ProgramResult;
+use solana_program::program::{invoke, invoke_signed};
+use solana_program::pubkey::Pubkey;
+use solana_program::rent::Rent;
+use solana_program::system_instruction::create_account;
+use solana_program::{msg, system_program};
+use solana_program::sysvar::Sysvar;
+use solana_program::program_pack::Pack;
+use crate::generated::errors::ExpenseSplitterError;
+use crate::generated::instructions::ExpenseSplitterInstruction;
+
+use crate::generated::state::{
+	Account,
+	AccountPDA,
+	GroupAccount,
+};
+use crate::src::*;
+
+pub struct Processor;
+
+impl Processor {
+    pub fn process(
+        program_id: &Pubkey,
+        accounts: &[AccountInfo],
+        data: &[u8],
+    ) -> ProgramResult {
+        let instruction = ExpenseSplitterInstruction::unpack(data)?;
+
+        match instruction {
+			ExpenseSplitterInstruction::CreateGroup(args) => {
+				msg!("Instruction: CreateGroup");
+				Self::process_create_group(
+					program_id,
+					accounts, 
+					args.group_name,
+					args.members,
+					args.initial_balances,
+					args.group_account_seed_group_name,
+				)
+			}
+			ExpenseSplitterInstruction::AddMember(args) => {
+				msg!("Instruction: AddMember");
+				Self::process_add_member(
+					program_id,
+					accounts, 
+					args.new_member,
+					args.group_account_seed_group_name,
+				)
+			}
+			ExpenseSplitterInstruction::RemoveMember(args) => {
+				msg!("Instruction: RemoveMember");
+				Self::process_remove_member(
+					program_id,
+					accounts, 
+					args.member,
+					args.group_account_seed_group_name,
+				)
+			}
+			ExpenseSplitterInstruction::LogPayment(args) => {
+				msg!("Instruction: LogPayment");
+				Self::process_log_payment(
+					program_id,
+					accounts, 
+					args.title,
+					args.participants,
+					args.amounts,
+					args.participation_factors,
+					args.group_account_seed_group_name,
+				)
+			}
+        }
+    }
+
+/// Creates a new group with initial members and balances.
+///
+/// Accounts:
+/// 0. `[writable, signer]` fee_payer: [AccountInfo] Auto-generated, default fee payer
+/// 1. `[writable]` group_account: [GroupAccount] 
+/// 2. `[]` system_program: [AccountInfo] Auto-generated, for account initialization
+///
+/// Data:
+/// - group_name: [String] The name of the group.
+/// - members: [Vec<Pubkey>] Array of member public keys.
+/// - initial_balances: [Vec<i64>] Array of initial balances for each member.
+/// - group_account_seed_group_name: [String] Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+	pub fn process_create_group(
+		program_id: &Pubkey,
+		accounts: &[AccountInfo],
+		group_name: String,
+		members: Vec<Pubkey>,
+		initial_balances: Vec<i64>,
+		group_account_seed_group_name: String,
+	) -> ProgramResult {
+		let account_info_iter = &mut accounts.iter();
+		let fee_payer_info = next_account_info(account_info_iter)?;
+		let group_account_info = next_account_info(account_info_iter)?;
+		let system_program_info = next_account_info(account_info_iter)?;
+
+		// Derive PDAs
+		let (group_account_pubkey, group_account_bump) = Pubkey::find_program_address(
+			&[group_account_seed_group_name.as_bytes().as_ref()],
+			program_id,
+		);
+
+		// Security Checks
+		if fee_payer_info.is_signer != true {
+			return Err(ExpenseSplitterError::InvalidSignerPermission.into());
+		}
+
+		if *group_account_info.key != group_account_pubkey {
+			return Err(ExpenseSplitterError::NotExpectedAddress.into());
+		}
+
+		if *system_program_info.key != Pubkey::from_str("11111111111111111111111111111111").unwrap() {
+			return Err(ExpenseSplitterError::NotExpectedAddress.into());
+		}
+
+
+		// Accounts Initializations
+		let space: usize = 4112;
+		let rent = Rent::get()?;
+		let rent_minimum_balance = rent.minimum_balance(space);
+
+		invoke_signed(
+			&create_account(
+				&fee_payer_info.key,
+				&group_account_info.key,
+				rent_minimum_balance,
+				space as u64,
+				program_id,
+			),
+			&[fee_payer_info.clone(), group_account_info.clone()],
+			&[&[group_account_seed_group_name.as_bytes().as_ref(), &[group_account_bump]]],
+		)?;
+
+
+		// Security Checks
+		if *fee_payer_info.owner != Pubkey::from_str("11111111111111111111111111111111").unwrap() {
+			return Err(ExpenseSplitterError::WrongAccountOwner.into());
+		}
+
+		if *group_account_info.owner != *program_id {
+			return Err(ExpenseSplitterError::WrongAccountOwner.into());
+		}
+
+		if group_account_info.data_len() != 4112usize {
+			return Err(ExpenseSplitterError::InvalidAccountLen.into());
+		}
+
+
+		// Accounts Deserialization
+		let group_account = &mut AccountPDA::new(
+			&group_account_info,
+			try_from_slice_unchecked::<GroupAccount>(&group_account_info.data.borrow()).unwrap(),
+			group_account_bump,
+		);
+
+		// Calling STUB
+		create_group::create_group(
+			program_id,
+			group_account,
+			group_name,
+			members,
+			initial_balances,
+		)?;
+
+		// Accounts Serialization
+		group_account.data.serialize(&mut &mut group_account_info.data.borrow_mut()[..])?;
+		
+		Ok(())
+	}
+
+/// Adds a new member to the group.
+///
+/// Accounts:
+/// 0. `[writable, signer]` fee_payer: [AccountInfo] Auto-generated, default fee payer
+/// 1. `[writable]` group_account: [GroupAccount] 
+///
+/// Data:
+/// - new_member: [Pubkey] Public key of the new member.
+/// - group_account_seed_group_name: [String] Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+	pub fn process_add_member(
+		program_id: &Pubkey,
+		accounts: &[AccountInfo],
+		new_member: Pubkey,
+		group_account_seed_group_name: String,
+	) -> ProgramResult {
+		let account_info_iter = &mut accounts.iter();
+		let fee_payer_info = next_account_info(account_info_iter)?;
+		let group_account_info = next_account_info(account_info_iter)?;
+
+		// Derive PDAs
+		let (group_account_pubkey, group_account_bump) = Pubkey::find_program_address(
+			&[group_account_seed_group_name.as_bytes().as_ref()],
+			program_id,
+		);
+
+		// Security Checks
+		if fee_payer_info.is_signer != true {
+			return Err(ExpenseSplitterError::InvalidSignerPermission.into());
+		}
+
+		if *group_account_info.key != group_account_pubkey {
+			return Err(ExpenseSplitterError::NotExpectedAddress.into());
+		}
+
+
+
+		// Security Checks
+		if *fee_payer_info.owner != Pubkey::from_str("11111111111111111111111111111111").unwrap() {
+			return Err(ExpenseSplitterError::WrongAccountOwner.into());
+		}
+
+		if *group_account_info.owner != *program_id {
+			return Err(ExpenseSplitterError::WrongAccountOwner.into());
+		}
+
+		if group_account_info.data_len() != 4112usize {
+			return Err(ExpenseSplitterError::InvalidAccountLen.into());
+		}
+
+
+		// Accounts Deserialization
+		let group_account = &mut AccountPDA::new(
+			&group_account_info,
+			try_from_slice_unchecked::<GroupAccount>(&group_account_info.data.borrow()).unwrap(),
+			group_account_bump,
+		);
+
+		// Calling STUB
+		add_member::add_member(
+			program_id,
+			group_account,
+			new_member,
+		)?;
+
+		// Accounts Serialization
+		group_account.data.serialize(&mut &mut group_account_info.data.borrow_mut()[..])?;
+		
+		Ok(())
+	}
+
+/// Removes a member from the group.
+///
+/// Accounts:
+/// 0. `[writable, signer]` fee_payer: [AccountInfo] Auto-generated, default fee payer
+/// 1. `[writable]` group_account: [GroupAccount] 
+///
+/// Data:
+/// - member: [Pubkey] Public key of the member to remove.
+/// - group_account_seed_group_name: [String] Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+	pub fn process_remove_member(
+		program_id: &Pubkey,
+		accounts: &[AccountInfo],
+		member: Pubkey,
+		group_account_seed_group_name: String,
+	) -> ProgramResult {
+		let account_info_iter = &mut accounts.iter();
+		let fee_payer_info = next_account_info(account_info_iter)?;
+		let group_account_info = next_account_info(account_info_iter)?;
+
+		// Derive PDAs
+		let (group_account_pubkey, group_account_bump) = Pubkey::find_program_address(
+			&[group_account_seed_group_name.as_bytes().as_ref()],
+			program_id,
+		);
+
+		// Security Checks
+		if fee_payer_info.is_signer != true {
+			return Err(ExpenseSplitterError::InvalidSignerPermission.into());
+		}
+
+		if *group_account_info.key != group_account_pubkey {
+			return Err(ExpenseSplitterError::NotExpectedAddress.into());
+		}
+
+
+
+		// Security Checks
+		if *fee_payer_info.owner != Pubkey::from_str("11111111111111111111111111111111").unwrap() {
+			return Err(ExpenseSplitterError::WrongAccountOwner.into());
+		}
+
+		if *group_account_info.owner != *program_id {
+			return Err(ExpenseSplitterError::WrongAccountOwner.into());
+		}
+
+		if group_account_info.data_len() != 4112usize {
+			return Err(ExpenseSplitterError::InvalidAccountLen.into());
+		}
+
+
+		// Accounts Deserialization
+		let group_account = &mut AccountPDA::new(
+			&group_account_info,
+			try_from_slice_unchecked::<GroupAccount>(&group_account_info.data.borrow()).unwrap(),
+			group_account_bump,
+		);
+
+		// Calling STUB
+		remove_member::remove_member(
+			program_id,
+			group_account,
+			member,
+		)?;
+
+		// Accounts Serialization
+		group_account.data.serialize(&mut &mut group_account_info.data.borrow_mut()[..])?;
+		
+		Ok(())
+	}
+
+/// Logs a payment made by or for group members, updating balances accordingly.
+///
+/// Accounts:
+/// 0. `[writable, signer]` fee_payer: [AccountInfo] Auto-generated, default fee payer
+/// 1. `[writable]` group_account: [GroupAccount] 
+///
+/// Data:
+/// - title: [String] Title or description of the payment.
+/// - participants: [Vec<Pubkey>] Array of participating member public keys.
+/// - amounts: [Vec<u64>] Array of amounts each participant gave to the group.
+/// - participation_factors: [Vec<u64>] Array of participation factors for each participant.
+/// - group_account_seed_group_name: [String] Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+	pub fn process_log_payment(
+		program_id: &Pubkey,
+		accounts: &[AccountInfo],
+		title: String,
+		participants: Vec<Pubkey>,
+		amounts: Vec<u64>,
+		participation_factors: Vec<u64>,
+		group_account_seed_group_name: String,
+	) -> ProgramResult {
+		let account_info_iter = &mut accounts.iter();
+		let fee_payer_info = next_account_info(account_info_iter)?;
+		let group_account_info = next_account_info(account_info_iter)?;
+
+		// Derive PDAs
+		let (group_account_pubkey, group_account_bump) = Pubkey::find_program_address(
+			&[group_account_seed_group_name.as_bytes().as_ref()],
+			program_id,
+		);
+
+		// Security Checks
+		if fee_payer_info.is_signer != true {
+			return Err(ExpenseSplitterError::InvalidSignerPermission.into());
+		}
+
+		if *group_account_info.key != group_account_pubkey {
+			return Err(ExpenseSplitterError::NotExpectedAddress.into());
+		}
+
+
+
+		// Security Checks
+		if *fee_payer_info.owner != Pubkey::from_str("11111111111111111111111111111111").unwrap() {
+			return Err(ExpenseSplitterError::WrongAccountOwner.into());
+		}
+
+		if *group_account_info.owner != *program_id {
+			return Err(ExpenseSplitterError::WrongAccountOwner.into());
+		}
+
+		if group_account_info.data_len() != 4112usize {
+			return Err(ExpenseSplitterError::InvalidAccountLen.into());
+		}
+
+
+		// Accounts Deserialization
+		let group_account = &mut AccountPDA::new(
+			&group_account_info,
+			try_from_slice_unchecked::<GroupAccount>(&group_account_info.data.borrow()).unwrap(),
+			group_account_bump,
+		);
+
+		// Calling STUB
+		log_payment::log_payment(
+			program_id,
+			group_account,
+			title,
+			participants,
+			amounts,
+			participation_factors,
+		)?;
+
+		// Accounts Serialization
+		group_account.data.serialize(&mut &mut group_account_info.data.borrow_mut()[..])?;
+		
+		Ok(())
+	}
+}
\ No newline at end of file
diff --git a/examples/solana_native/expenses_splitting/program/generated/state.rs b/examples/solana_native/expenses_splitting/program/generated/state.rs
new file mode 100644
index 0000000..d6800ad
--- /dev/null
+++ b/examples/solana_native/expenses_splitting/program/generated/state.rs
@@ -0,0 +1,40 @@
+// This file is auto-generated from the CIDL source.
+// Editing this file directly is not recommended as it may be overwritten.
+
+use borsh::{BorshDeserialize, BorshSerialize};
+use solana_program::account_info::AccountInfo;
+use solana_program::pubkey::Pubkey;
+
+#[derive(Clone, Debug)]
+pub struct Account<'a, 'b, T> {
+    pub data: T,
+    pub info: &'a AccountInfo<'b>,
+}
+
+#[derive(Clone, Debug)]
+pub struct AccountPDA<'a, 'b, T> {
+    pub data: T,
+    pub info: &'a AccountInfo<'b>,
+    pub bump: u8,
+}
+
+impl<'a, 'b, T> Account<'a, 'b, T> {
+    pub fn new(info: &'a AccountInfo<'b>, data: T) -> Self {
+        Self { data, info }
+    }
+}
+
+impl<'a, 'b, T> AccountPDA<'a, 'b, T> {
+    pub fn new(info: &'a AccountInfo<'b>, data: T, bump: u8) -> Self {
+        Self { data, info, bump }
+    }
+}
+
+/// Represents a group account with members and their balances.
+#[derive(BorshSerialize, BorshDeserialize, Debug, Clone, Default)]
+pub struct GroupAccount {
+	pub group_name: String,
+	pub members: Vec<Pubkey>,
+	pub balances: Vec<i64>,
+}
+
diff --git a/examples/solana_native/expenses_splitting/program/lib.rs b/examples/solana_native/expenses_splitting/program/lib.rs
new file mode 100644
index 0000000..df02c1d
--- /dev/null
+++ b/examples/solana_native/expenses_splitting/program/lib.rs
@@ -0,0 +1,5 @@
+// This file is auto-generated from the CIDL source.
+// Editing this file directly is not recommended as it may be overwritten.
+
+pub mod generated;
+pub mod src;
\ No newline at end of file
diff --git a/examples/solana_native/expenses_splitting/program/src/add_member.rs b/examples/solana_native/expenses_splitting/program/src/add_member.rs
new file mode 100644
index 0000000..531ff36
--- /dev/null
+++ b/examples/solana_native/expenses_splitting/program/src/add_member.rs
@@ -0,0 +1,34 @@
+use solana_program::entrypoint::ProgramResult;
+use solana_program::pubkey::Pubkey;
+
+use crate::generated::state::{AccountPDA, GroupAccount};
+
+/// Adds a new member to the group.
+///
+/// Accounts:
+/// 0. `[writable, signer]` fee_payer: [AccountInfo] Auto-generated, default fee payer
+/// 1. `[writable]` group_account: [GroupAccount]
+///
+/// Data:
+/// - new_member: [Pubkey] Public key of the new member.
+/// - group_account_seed_group_name: [String] Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+pub fn add_member(
+    program_id: &Pubkey,
+    group_account: &mut AccountPDA<GroupAccount>,
+    new_member: Pubkey,
+) -> ProgramResult {
+    assert!(
+        group_account.data.members.contains(group_account.info.key),
+        "only group members can add new members to the group account"
+    );
+
+    assert!(
+        !group_account.data.members.contains(&new_member),
+        "provided new member is already a member of this group"
+    );
+
+    group_account.data.members.push(new_member);
+    group_account.data.balances.push(0);
+
+    Ok(())
+}
diff --git a/examples/solana_native/expenses_splitting/program/src/create_group.rs b/examples/solana_native/expenses_splitting/program/src/create_group.rs
new file mode 100644
index 0000000..35c6970
--- /dev/null
+++ b/examples/solana_native/expenses_splitting/program/src/create_group.rs
@@ -0,0 +1,45 @@
+use solana_program::entrypoint::ProgramResult;
+use solana_program::pubkey::Pubkey;
+
+use crate::generated::state::{AccountPDA, GroupAccount};
+
+/// Creates a new group with initial members and balances.
+///
+/// Accounts:
+/// 0. `[writable, signer]` fee_payer: [AccountInfo] Auto-generated, default fee payer
+/// 1. `[writable]` group_account: [GroupAccount]
+/// 2. `[]` system_program: [AccountInfo] Auto-generated, for account initialization
+///
+/// Data:
+/// - group_name: [String] The name of the group.
+/// - members: [Vec<Pubkey>] Array of member public keys.
+/// - initial_balances: [Vec<i64>] Array of initial balances for each member.
+/// - group_account_seed_group_name: [String] Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+pub fn create_group(
+    program_id: &Pubkey,
+    group_account: &mut AccountPDA<GroupAccount>,
+    group_name: String,
+    members: Vec<Pubkey>,
+    initial_balances: Vec<i64>,
+) -> ProgramResult {
+    assert!(
+        members.len() > 0,
+        "members list should provide at least one address"
+    );
+
+    assert!(
+        initial_balances.len() == members.len(),
+        "members and initial balances lists should be of equal size"
+    );
+
+    assert!(
+        initial_balances.iter().sum::<i64>() == 0,
+        "initial balances should sum zero"
+    );
+
+    group_account.data.group_name = group_name;
+    group_account.data.members = members;
+    group_account.data.balances = initial_balances;
+
+    Ok(())
+}
diff --git a/examples/solana_native/expenses_splitting/program/src/log_payment.rs b/examples/solana_native/expenses_splitting/program/src/log_payment.rs
new file mode 100644
index 0000000..44fd6f0
--- /dev/null
+++ b/examples/solana_native/expenses_splitting/program/src/log_payment.rs
@@ -0,0 +1,92 @@
+use solana_program::entrypoint::ProgramResult;
+use solana_program::msg;
+use solana_program::pubkey::Pubkey;
+
+use crate::generated::state::{AccountPDA, GroupAccount};
+
+/// Logs a payment made by or for group members, updating balances accordingly.
+///
+/// Accounts:
+/// 0. `[writable, signer]` fee_payer: [AccountInfo] Auto-generated, default fee payer
+/// 1. `[writable]` group_account: [GroupAccount]
+///
+/// Data:
+/// - title: [String] Title or description of the payment.
+/// - participants: [Vec<Pubkey>] Array of participating member public keys.
+/// - amounts: [Vec<u64>] Array of amounts each participant gave to the group.
+/// - participation_factors: [Vec<u64>] Array of participation factors for each participant.
+/// - group_account_seed_group_name: [String] Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+pub fn log_payment(
+    program_id: &Pubkey,
+    group_account: &mut AccountPDA<GroupAccount>,
+    title: String,
+    participants: Vec<Pubkey>,
+    amounts: Vec<u64>,
+    participation_factors: Vec<u64>,
+) -> ProgramResult {
+    assert!(
+        group_account.data.members.contains(group_account.info.key),
+        "only group members can log payments in the group account"
+    );
+
+    assert!(
+        participants.len() > 0,
+        "participants list should provide at least one address"
+    );
+    assert!(
+        participants.len() == amounts.len(),
+        "participants and amounts lists should be of equal size"
+    );
+    assert!(
+        participants.len() == participation_factors.len(),
+        "participants and participation factors lists should be of equal size"
+    );
+
+    let total_amount: u64 = amounts.iter().sum();
+    let total_participation: u64 = participation_factors.iter().sum();
+
+    assert!(
+        total_participation > 0,
+        "participation factors sum should be greater than zero"
+    );
+
+    for (participant_idx, participant_address) in participants.iter().enumerate() {
+        // payment log participant addresses could be in any order, we need to match them with group account members order
+        let member_idx = group_account
+            .data
+            .members
+            .iter()
+            .position(|&member_address| member_address == *participant_address)
+            .expect(
+                format!(
+                    "participant {} is not a member of this group",
+                    participant_address
+                )
+                .as_str(),
+            );
+
+        // high-level formula: member balance += payment - total expenditure * participation
+        let expenditure =
+            total_amount * participation_factors[participant_idx] / total_participation;
+
+        group_account.data.balances[member_idx] += (amounts[participant_idx] - expenditure) as i64;
+
+        msg!(
+            "Group '{}' payment '{}' of {:?}. Member {} spended {:?} and paid {:?}",
+            group_account.data.group_name,
+            title,
+            total_amount,
+            participant_address,
+            expenditure,
+            amounts[participant_idx]
+        );
+    }
+
+    // just in case
+    assert!(
+        group_account.data.balances.iter().sum::<i64>() == 0,
+        "group balances should sum zero, something went wrong"
+    );
+
+    Ok(())
+}
diff --git a/examples/solana_native/expenses_splitting/program/src/mod.rs b/examples/solana_native/expenses_splitting/program/src/mod.rs
new file mode 100644
index 0000000..136d25a
--- /dev/null
+++ b/examples/solana_native/expenses_splitting/program/src/mod.rs
@@ -0,0 +1,7 @@
+// This file is auto-generated from the CIDL source.
+// Editing this file directly is not recommended as it may be overwritten.
+
+pub mod create_group;
+pub mod add_member;
+pub mod remove_member;
+pub mod log_payment;
diff --git a/examples/solana_native/expenses_splitting/program/src/remove_member.rs b/examples/solana_native/expenses_splitting/program/src/remove_member.rs
new file mode 100644
index 0000000..4e33938
--- /dev/null
+++ b/examples/solana_native/expenses_splitting/program/src/remove_member.rs
@@ -0,0 +1,41 @@
+use solana_program::entrypoint::ProgramResult;
+use solana_program::pubkey::Pubkey;
+
+use crate::generated::state::{AccountPDA, GroupAccount};
+
+/// Removes a member from the group.
+///
+/// Accounts:
+/// 0. `[writable, signer]` fee_payer: [AccountInfo] Auto-generated, default fee payer
+/// 1. `[writable]` group_account: [GroupAccount]
+///
+/// Data:
+/// - member: [Pubkey] Public key of the member to remove.
+/// - group_account_seed_group_name: [String] Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+pub fn remove_member(
+    program_id: &Pubkey,
+    group_account: &mut AccountPDA<GroupAccount>,
+    member: Pubkey,
+) -> ProgramResult {
+    assert!(
+        group_account.data.members.contains(group_account.info.key),
+        "only group members can remove members from the group account"
+    );
+
+    let member_idx = group_account
+        .data
+        .members
+        .iter()
+        .position(|&address| address == member)
+        .expect("could not find member to remove within this group");
+
+    assert!(
+        group_account.data.balances[member_idx] == 0,
+        "member balance should be zero before removal"
+    );
+
+    group_account.data.members.remove(member_idx);
+    group_account.data.balances.remove(member_idx);
+
+    Ok(())
+}
diff --git a/examples/solana_native/expenses_splitting/program_client/index.ts b/examples/solana_native/expenses_splitting/program_client/index.ts
new file mode 100644
index 0000000..674398a
--- /dev/null
+++ b/examples/solana_native/expenses_splitting/program_client/index.ts
@@ -0,0 +1,6 @@
+// This file is auto-generated from the CIDL source.
+// Editing this file directly is not recommended as it may be overwritten.
+
+export * from "./lib/pda";
+export * from "./lib/rpc";
+export * from "./lib/types";
diff --git a/examples/solana_native/expenses_splitting/program_client/lib/pda.ts b/examples/solana_native/expenses_splitting/program_client/lib/pda.ts
new file mode 100644
index 0000000..81ee21f
--- /dev/null
+++ b/examples/solana_native/expenses_splitting/program_client/lib/pda.ts
@@ -0,0 +1,21 @@
+// This file is auto-generated from the CIDL source.
+// Editing this file directly is not recommended as it may be overwritten.
+
+import {PublicKey} from "@solana/web3.js";
+
+export type GroupAccountSeeds = {
+    groupName: string, 
+};
+
+export const deriveGroupAccountPDA = (
+    seeds: GroupAccountSeeds,
+    programId: PublicKey
+): [PublicKey, number] => {
+    return PublicKey.findProgramAddressSync(
+        [
+            Buffer.from(seeds.groupName, "utf8"),
+        ],
+        programId,
+    )
+};
+
diff --git a/examples/solana_native/expenses_splitting/program_client/lib/rpc.ts b/examples/solana_native/expenses_splitting/program_client/lib/rpc.ts
new file mode 100644
index 0000000..8eddf25
--- /dev/null
+++ b/examples/solana_native/expenses_splitting/program_client/lib/rpc.ts
@@ -0,0 +1,485 @@
+// This file is auto-generated from the CIDL source.
+// Editing this file directly is not recommended as it may be overwritten.
+
+import * as pda from "./pda";
+import * as T from "./types";
+import {
+    Commitment,
+    Connection,
+    GetAccountInfoConfig,
+    Keypair,
+    PublicKey,
+    sendAndConfirmTransaction,
+    SystemProgram,
+    Transaction,
+    TransactionInstruction,
+    TransactionSignature,
+} from "@solana/web3.js";
+import {deserialize, serialize} from "borsh";
+
+
+let _programId: PublicKey;
+let _connection: Connection;
+
+export const initializeClient = (
+    programId: PublicKey,
+    connection: Connection
+) => {
+    _programId = programId;
+    _connection = connection;
+};
+
+export enum ExpenseSplitterInstruction {
+/**
+ * Creates a new group with initial members and balances.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ * 2. `[]` system_program: {@link PublicKey} Auto-generated, for account initialization
+ *
+ * Data:
+ * - group_name: {@link string} The name of the group.
+ * - members: {@link PublicKey[]} Array of member public keys.
+ * - initial_balances: {@link BigInt[]} Array of initial balances for each member.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+    CreateGroup = 0,
+
+/**
+ * Adds a new member to the group.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ *
+ * Data:
+ * - new_member: {@link PublicKey} Public key of the new member.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+    AddMember = 1,
+
+/**
+ * Removes a member from the group.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ *
+ * Data:
+ * - member: {@link PublicKey} Public key of the member to remove.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+    RemoveMember = 2,
+
+/**
+ * Logs a payment made by or for group members, updating balances accordingly.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ *
+ * Data:
+ * - title: {@link string} Title or description of the payment.
+ * - participants: {@link PublicKey[]} Array of participating member public keys.
+ * - amounts: {@link BigInt[]} Array of amounts each participant gave to the group.
+ * - participation_factors: {@link BigInt[]} Array of participation factors for each participant.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+    LogPayment = 3,
+}
+
+export type CreateGroupArgs = {
+	feePayer: PublicKey;
+	groupName: string;
+	members: PublicKey[];
+	initialBalances: bigint[];
+	groupAccountSeedGroupName: string;
+};
+
+/**
+ * ### Returns a {@link TransactionInstruction}
+ * Creates a new group with initial members and balances.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ * 2. `[]` system_program: {@link PublicKey} Auto-generated, for account initialization
+ *
+ * Data:
+ * - group_name: {@link string} The name of the group.
+ * - members: {@link PublicKey[]} Array of member public keys.
+ * - initial_balances: {@link BigInt[]} Array of initial balances for each member.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+export const createGroup = (args: CreateGroupArgs, remainingAccounts: Array<PublicKey> = []): TransactionInstruction => {
+		const data = serialize(
+        {
+            struct: {
+                id: "u8",
+								group_name: "string",
+								members: { array: { type: { array: { type: "u8", len: 32 } } } },
+								initial_balances: { array: { type: "i64" } },
+								group_account_seed_group_name: "string",
+            },
+        },
+        {
+            id: ExpenseSplitterInstruction.CreateGroup,
+						group_name: args.groupName,
+						members: args.members.map(e => e.toBytes()),
+						initial_balances: args.initialBalances,
+						group_account_seed_group_name: args.groupAccountSeedGroupName,
+        }
+    );
+
+		const [groupAccountPubkey] = pda.deriveGroupAccountPDA({
+				groupName: args.groupAccountSeedGroupName,
+    }, _programId);
+
+    return new TransactionInstruction({
+        data: Buffer.from(data),
+        keys: [
+						{pubkey: args.feePayer, isSigner: true, isWritable: true},
+						{pubkey: groupAccountPubkey, isSigner: false, isWritable: true},
+						{pubkey: new PublicKey("11111111111111111111111111111111"), isSigner: false, isWritable: false},
+            ...remainingAccounts.map(e => ({pubkey: e, isSigner: false, isWritable: false})),
+        ],
+        programId: _programId,
+    });
+};
+
+/**
+ * ### Returns a {@link TransactionSignature}
+ * Creates a new group with initial members and balances.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ * 2. `[]` system_program: {@link PublicKey} Auto-generated, for account initialization
+ *
+ * Data:
+ * - group_name: {@link string} The name of the group.
+ * - members: {@link PublicKey[]} Array of member public keys.
+ * - initial_balances: {@link BigInt[]} Array of initial balances for each member.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+export const createGroupSendAndConfirm = async (
+	args: Omit<CreateGroupArgs, "feePayer"> & {
+	  signers: {
+			feePayer: Keypair,
+	  }
+  }, 
+  remainingAccounts: Array<PublicKey> = []
+): Promise<TransactionSignature> => {
+  const trx = new Transaction();
+
+
+	trx.add(createGroup({
+		...args,
+		feePayer: args.signers.feePayer.publicKey,
+	}, remainingAccounts));
+
+  return await sendAndConfirmTransaction(
+    _connection,
+    trx,
+    [
+				args.signers.feePayer,
+    ]
+  );
+};
+
+export type AddMemberArgs = {
+	feePayer: PublicKey;
+	newMember: PublicKey;
+	groupAccountSeedGroupName: string;
+};
+
+/**
+ * ### Returns a {@link TransactionInstruction}
+ * Adds a new member to the group.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ *
+ * Data:
+ * - new_member: {@link PublicKey} Public key of the new member.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+export const addMember = (args: AddMemberArgs, remainingAccounts: Array<PublicKey> = []): TransactionInstruction => {
+		const data = serialize(
+        {
+            struct: {
+                id: "u8",
+								new_member: { array: { type: "u8", len: 32 } },
+								group_account_seed_group_name: "string",
+            },
+        },
+        {
+            id: ExpenseSplitterInstruction.AddMember,
+						new_member: args.newMember.toBytes(),
+						group_account_seed_group_name: args.groupAccountSeedGroupName,
+        }
+    );
+
+		const [groupAccountPubkey] = pda.deriveGroupAccountPDA({
+				groupName: args.groupAccountSeedGroupName,
+    }, _programId);
+
+    return new TransactionInstruction({
+        data: Buffer.from(data),
+        keys: [
+						{pubkey: args.feePayer, isSigner: true, isWritable: true},
+						{pubkey: groupAccountPubkey, isSigner: false, isWritable: true},
+            ...remainingAccounts.map(e => ({pubkey: e, isSigner: false, isWritable: false})),
+        ],
+        programId: _programId,
+    });
+};
+
+/**
+ * ### Returns a {@link TransactionSignature}
+ * Adds a new member to the group.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ *
+ * Data:
+ * - new_member: {@link PublicKey} Public key of the new member.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+export const addMemberSendAndConfirm = async (
+	args: Omit<AddMemberArgs, "feePayer"> & {
+	  signers: {
+			feePayer: Keypair,
+	  }
+  }, 
+  remainingAccounts: Array<PublicKey> = []
+): Promise<TransactionSignature> => {
+  const trx = new Transaction();
+
+
+	trx.add(addMember({
+		...args,
+		feePayer: args.signers.feePayer.publicKey,
+	}, remainingAccounts));
+
+  return await sendAndConfirmTransaction(
+    _connection,
+    trx,
+    [
+				args.signers.feePayer,
+    ]
+  );
+};
+
+export type RemoveMemberArgs = {
+	feePayer: PublicKey;
+	member: PublicKey;
+	groupAccountSeedGroupName: string;
+};
+
+/**
+ * ### Returns a {@link TransactionInstruction}
+ * Removes a member from the group.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ *
+ * Data:
+ * - member: {@link PublicKey} Public key of the member to remove.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+export const removeMember = (args: RemoveMemberArgs, remainingAccounts: Array<PublicKey> = []): TransactionInstruction => {
+		const data = serialize(
+        {
+            struct: {
+                id: "u8",
+								member: { array: { type: "u8", len: 32 } },
+								group_account_seed_group_name: "string",
+            },
+        },
+        {
+            id: ExpenseSplitterInstruction.RemoveMember,
+						member: args.member.toBytes(),
+						group_account_seed_group_name: args.groupAccountSeedGroupName,
+        }
+    );
+
+		const [groupAccountPubkey] = pda.deriveGroupAccountPDA({
+				groupName: args.groupAccountSeedGroupName,
+    }, _programId);
+
+    return new TransactionInstruction({
+        data: Buffer.from(data),
+        keys: [
+						{pubkey: args.feePayer, isSigner: true, isWritable: true},
+						{pubkey: groupAccountPubkey, isSigner: false, isWritable: true},
+            ...remainingAccounts.map(e => ({pubkey: e, isSigner: false, isWritable: false})),
+        ],
+        programId: _programId,
+    });
+};
+
+/**
+ * ### Returns a {@link TransactionSignature}
+ * Removes a member from the group.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ *
+ * Data:
+ * - member: {@link PublicKey} Public key of the member to remove.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+export const removeMemberSendAndConfirm = async (
+	args: Omit<RemoveMemberArgs, "feePayer"> & {
+	  signers: {
+			feePayer: Keypair,
+	  }
+  }, 
+  remainingAccounts: Array<PublicKey> = []
+): Promise<TransactionSignature> => {
+  const trx = new Transaction();
+
+
+	trx.add(removeMember({
+		...args,
+		feePayer: args.signers.feePayer.publicKey,
+	}, remainingAccounts));
+
+  return await sendAndConfirmTransaction(
+    _connection,
+    trx,
+    [
+				args.signers.feePayer,
+    ]
+  );
+};
+
+export type LogPaymentArgs = {
+	feePayer: PublicKey;
+	title: string;
+	participants: PublicKey[];
+	amounts: bigint[];
+	participationFactors: bigint[];
+	groupAccountSeedGroupName: string;
+};
+
+/**
+ * ### Returns a {@link TransactionInstruction}
+ * Logs a payment made by or for group members, updating balances accordingly.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ *
+ * Data:
+ * - title: {@link string} Title or description of the payment.
+ * - participants: {@link PublicKey[]} Array of participating member public keys.
+ * - amounts: {@link BigInt[]} Array of amounts each participant gave to the group.
+ * - participation_factors: {@link BigInt[]} Array of participation factors for each participant.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+export const logPayment = (args: LogPaymentArgs, remainingAccounts: Array<PublicKey> = []): TransactionInstruction => {
+		const data = serialize(
+        {
+            struct: {
+                id: "u8",
+								title: "string",
+								participants: { array: { type: { array: { type: "u8", len: 32 } } } },
+								amounts: { array: { type: "u64" } },
+								participation_factors: { array: { type: "u64" } },
+								group_account_seed_group_name: "string",
+            },
+        },
+        {
+            id: ExpenseSplitterInstruction.LogPayment,
+						title: args.title,
+						participants: args.participants.map(e => e.toBytes()),
+						amounts: args.amounts,
+						participation_factors: args.participationFactors,
+						group_account_seed_group_name: args.groupAccountSeedGroupName,
+        }
+    );
+
+		const [groupAccountPubkey] = pda.deriveGroupAccountPDA({
+				groupName: args.groupAccountSeedGroupName,
+    }, _programId);
+
+    return new TransactionInstruction({
+        data: Buffer.from(data),
+        keys: [
+						{pubkey: args.feePayer, isSigner: true, isWritable: true},
+						{pubkey: groupAccountPubkey, isSigner: false, isWritable: true},
+            ...remainingAccounts.map(e => ({pubkey: e, isSigner: false, isWritable: false})),
+        ],
+        programId: _programId,
+    });
+};
+
+/**
+ * ### Returns a {@link TransactionSignature}
+ * Logs a payment made by or for group members, updating balances accordingly.
+ *
+ * Accounts:
+ * 0. `[writable, signer]` fee_payer: {@link PublicKey} Auto-generated, default fee payer
+ * 1. `[writable]` group_account: {@link GroupAccount} 
+ *
+ * Data:
+ * - title: {@link string} Title or description of the payment.
+ * - participants: {@link PublicKey[]} Array of participating member public keys.
+ * - amounts: {@link BigInt[]} Array of amounts each participant gave to the group.
+ * - participation_factors: {@link BigInt[]} Array of participation factors for each participant.
+ * - group_account_seed_group_name: {@link string} Auto-generated, from the input "group_account" for the its seed definition "GroupAccount", sets the seed named "group_name"
+ */
+export const logPaymentSendAndConfirm = async (
+	args: Omit<LogPaymentArgs, "feePayer"> & {
+	  signers: {
+			feePayer: Keypair,
+	  }
+  }, 
+  remainingAccounts: Array<PublicKey> = []
+): Promise<TransactionSignature> => {
+  const trx = new Transaction();
+
+
+	trx.add(logPayment({
+		...args,
+		feePayer: args.signers.feePayer.publicKey,
+	}, remainingAccounts));
+
+  return await sendAndConfirmTransaction(
+    _connection,
+    trx,
+    [
+				args.signers.feePayer,
+    ]
+  );
+};
+
+// Getters
+
+export const getGroupAccount = async (
+    publicKey: PublicKey,
+    commitmentOrConfig: Commitment | GetAccountInfoConfig | undefined = "processed"
+): Promise<T.GroupAccount | undefined> => {
+    const buffer = await _connection.getAccountInfo(publicKey, commitmentOrConfig);
+
+    if (!buffer) {
+        return undefined
+    }
+
+    if (buffer.data.length <= 0) {
+        return undefined
+    }
+
+    return T.decodeGroupAccount(deserialize(T.GroupAccountSchema, buffer.data) as Record<string, unknown>);
+}
+
+
+// Websocket Events
+
diff --git a/examples/solana_native/expenses_splitting/program_client/lib/types.ts b/examples/solana_native/expenses_splitting/program_client/lib/types.ts
new file mode 100644
index 0000000..5810a2b
--- /dev/null
+++ b/examples/solana_native/expenses_splitting/program_client/lib/types.ts
@@ -0,0 +1,31 @@
+// This file is auto-generated from the CIDL source.
+// Editing this file directly is not recommended as it may be overwritten.
+
+import type {Schema} from 'borsh';
+import type {Decoded} from "./utils";
+import {PublicKey} from "@solana/web3.js";
+import { deserialize } from "borsh";
+
+/// Represents a group account with members and their balances.
+export interface GroupAccount {
+  groupName: string;
+  members: PublicKey[];
+  balances: bigint[];
+}
+
+export const decodeGroupAccount = (decoded: Decoded): GroupAccount => ({
+    groupName: decoded["group_name"] as string,
+    members: (decoded["members"] as Uint8Array[]).map(e => new PublicKey(e)),
+    balances: decoded["balances"] as bigint[],
+});
+
+export const GroupAccountSchema: Schema =  {
+    struct: {
+        group_name: "string",
+        members: { array: { type: { array: { type: "u8", len: 32 } } } },
+        balances: { array: { type: "i64" } },
+    }
+};
+
+
+
diff --git a/examples/solana_native/expenses_splitting/program_client/lib/utils.ts b/examples/solana_native/expenses_splitting/program_client/lib/utils.ts
new file mode 100644
index 0000000..3ae5cdd
--- /dev/null
+++ b/examples/solana_native/expenses_splitting/program_client/lib/utils.ts
@@ -0,0 +1 @@
+export type Decoded = Record<string, unknown>;
\ No newline at end of file
diff --git a/examples/solana_native/expenses_splitting/program_client/package.json b/examples/solana_native/expenses_splitting/program_client/package.json
new file mode 100644
index 0000000..7bd94bd
--- /dev/null
+++ b/examples/solana_native/expenses_splitting/program_client/package.json
@@ -0,0 +1,23 @@
+{
+  "name": "expense_splitter",
+  "version": "1.0.0",
+  "private": true,
+  "license": "MIT License",
+  "author": {
+    "name": "Developer Name",
+    "email": "contact@developerwebsite.com",
+    "url": "https://developerwebsite.com"
+  },
+  "repository": {
+    "url": "https://github.com/developer/ExpenseSplitter"
+  },
+  "description": "A contract for managing group expenses, allowing members to split costs fairly.",
+  "dependencies": {
+    "@solana/web3.js": "^1.78.3",
+    "borsh": "^1.0.0",
+    "typescript": "^5.1.6"
+  },
+  "engines": {
+    "node": ">=14.0.0"
+  }
+}
\ No newline at end of file
diff --git a/examples/solana_native/expenses_splitting/program_client/tsconfig.json b/examples/solana_native/expenses_splitting/program_client/tsconfig.json
new file mode 100644
index 0000000..f31ec9f
--- /dev/null
+++ b/examples/solana_native/expenses_splitting/program_client/tsconfig.json
@@ -0,0 +1,35 @@
+{
+  "$schema": "https://json.schemastore.org/tsconfig",
+  "compilerOptions": {
+    "lib": [
+      "ES2020"
+    ],
+    "module": "commonjs",
+    "target": "ES2020",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "moduleResolution": "node",
+    "allowUnusedLabels": false,
+    "allowUnreachableCode": false,
+    "noFallthroughCasesInSwitch": true,
+    "noImplicitOverride": true,
+    "noImplicitReturns": true,
+    "noPropertyAccessFromIndexSignature": true,
+    "noUncheckedIndexedAccess": true,
+    "noUnusedLocals": false,
+    "noUnusedParameters": true,
+    "strictNullChecks": true,
+    "strictPropertyInitialization": true,
+    "outDir": "dist",
+    "baseUrl": "./",
+    "declaration": true
+  },
+  "include": [
+    "./lib/**/*"
+  ],
+  "exclude": [
+    "node_modules"
+  ]
+}
\ No newline at end of file