feat: external wallet support for secure CLI trading

[arein]

Summary

Enables Polymarket CLI users to trade without exposing their private keys. External wallets (e.g. MetaMask via WalletConnect) can now handle signing and transaction sending through WalletConnect's CLI SDK, so users get the full CLI experience — connect wallet, approve contracts, place orders — without compromising on security.

polymarket.mp4

How it works

flowchart TD
    A[polymarket approve set] --> B{Wallet type?}
    B -->|Local private key| C[alloy Provider]
    C --> D[Sign + send via eth_sendRawTransaction]
    D --> E[alloy .watch await confirms tx]
    B -->|External wallet via CWP| F[Encode calldata via SolCall]
    F --> G[CWP send-transaction]
    G --> H[External wallet signs + sends]
    H --> I[Poll RPC for receipt with timeout]
    E --> J[✓ Approval confirmed]
    I --> J

Loading

Changes

• src/cwp.rs — Add send-transaction types and methods to CwpSigner
• src/auth.rs — Add send_and_confirm_cwp_tx helper with 2-minute timeout and on-chain revert detection; update resolve_signer to return PolySigner enum
• src/commands/approve.rs — Branch approve set on local vs external wallet signer
• src/commands/wallet.rs — Add wallet connect/disconnect commands for external wallets
• src/config.rs — Persist external wallet configuration (provider binary, address, signature type)
• Cargo.toml — Add eip712 alloy feature and async-trait dependency

Test plan

• cargo build compiles
• cargo test — all 143 tests pass
• polymarket approve set with WalletConnect wallet — all 6 approvals (3 USDC + 3 CTF) confirmed on-chain
• polymarket approve check still works for both wallet types
• polymarket clob create-order works end-to-end with external wallet — order was signed, posted, and matched
• Manual test with local private key wallet (verify no regression)

🤖 Generated with Claude Code

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Note

Medium Risk
Introduces a new signing/tx-sending path that shells out to external wallet-* binaries and changes how approvals are broadcast and confirmed, which can affect trading flows. Config format changes (new signer type + optional key) may impact existing users if not migrated carefully.

Overview
Enables external wallet signing via a new CwpSigner/PolySigner abstraction, allowing the CLI to authenticate and sign EIP-712 typed data through a CWP provider instead of requiring a local private key.

Adds polymarket wallet connect/disconnect to discover and persist a CWP provider + address, updates config storage to support signer_type with optional private_key, and reworks approve set to either send transactions normally (local key) or ABI-encode calldata and submit via CWP with RPC receipt polling + revert detection (send_and_confirm_cwp_tx).

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