From 2451245855e168d28bcac92c04b7189b337deccc Mon Sep 17 00:00:00 2001
From: Nic Dorman <nbdorman@gmail.com>
Date: Wed, 13 May 2026 14:48:25 +0000
Subject: [PATCH] fix(antd-lua): add missing discover module to rockspec; fix
 example cost-table concatenation
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The rockspec listed only 5 of the 6 .lua modules — antd.discover was
missing — so after luarocks make, require("antd") failed:

  module antd.discover not found:
    no file .../antd/discover.lua

Add the missing entry.

Also fix three examples that tried to concatenate a Lua table (the cost
estimate) directly to a string — same shape as #66 (PHP) and #67 (Elixir).
02-data.lua is reworked to match the Python/PHP/Elixir shape (estimate-
then-store, round-trip assertion, OK marker); 04-files.lua and 05-graph.lua
get single-line fixes.

Closes #68
---
 antd-lua/antd-scm-1.rockspec   |  1 +
 antd-lua/examples/02-data.lua  | 42 +++++++++++++++++++---------------
 antd-lua/examples/04-files.lua |  2 +-
 antd-lua/examples/05-graph.lua |  2 +-
 4 files changed, 27 insertions(+), 20 deletions(-)

diff --git a/antd-lua/antd-scm-1.rockspec b/antd-lua/antd-scm-1.rockspec
index a80ca95..3ab72c5 100644
--- a/antd-lua/antd-scm-1.rockspec
+++ b/antd-lua/antd-scm-1.rockspec
@@ -27,5 +27,6 @@ build = {
         ["antd.models"]   = "src/antd/models.lua",
         ["antd.errors"]   = "src/antd/errors.lua",
         ["antd.base64"]   = "src/antd/base64.lua",
+        ["antd.discover"] = "src/antd/discover.lua",
     },
 }
diff --git a/antd-lua/examples/02-data.lua b/antd-lua/examples/02-data.lua
index d97fd66..9e5212e 100644
--- a/antd-lua/examples/02-data.lua
+++ b/antd-lua/examples/02-data.lua
@@ -1,34 +1,40 @@
---- Example: Store and retrieve public data.
+--- Example 02: Store and retrieve public data, with cost estimation.
+--
+-- Prerequisite: antd daemon running on local testnet.
 
 local antd = require("antd")
 
 local client = antd.new_client()
 
--- Store public data
-local data = "Hello, Autonomi!"
-local result, err = client:data_put_public(data)
-if err then
-    print("Put error: " .. err.message)
+local payload = "Hello, Autonomi!"
+
+-- Estimate cost before storing
+local est, err1 = client:data_cost(payload)
+if err1 then
+    print("Cost error: " .. err1.message)
     os.exit(1)
 end
+print(string.format(
+    "Estimate: %d bytes in %d chunks, storage %s atto, gas %s wei, mode %s",
+    est.file_size, est.chunk_count, est.cost, est.estimated_gas_cost_wei, est.payment_mode
+))
 
-print("Stored at: " .. result.address)
-print("Cost: " .. result.cost .. " atto")
-
--- Retrieve it back
-local retrieved, err2 = client:data_get_public(result.address)
+-- Store public data
+local result, err2 = client:data_put_public(payload)
 if err2 then
-    print("Get error: " .. err2.message)
+    print("Put error: " .. err2.message)
     os.exit(1)
 end
+print("Stored at address: " .. result.address)
+print("Actual cost: " .. result.cost .. " atto tokens")
 
-print("Retrieved: " .. retrieved)
-
--- Estimate cost before storing
-local cost, err3 = client:data_cost("Some data to estimate")
+-- Retrieve it back
+local retrieved, err3 = client:data_get_public(result.address)
 if err3 then
-    print("Cost error: " .. err3.message)
+    print("Get error: " .. err3.message)
     os.exit(1)
 end
+print("Retrieved: " .. retrieved)
 
-print("Estimated cost: " .. cost .. " atto")
+assert(retrieved == payload, "Round-trip mismatch!")
+print("Public data round-trip OK!")
diff --git a/antd-lua/examples/04-files.lua b/antd-lua/examples/04-files.lua
index 7e7e01f..8f3908d 100644
--- a/antd-lua/examples/04-files.lua
+++ b/antd-lua/examples/04-files.lua
@@ -40,4 +40,4 @@ if err5 then
     os.exit(1)
 end
 
-print("Estimated upload cost: " .. cost .. " atto")
+print(string.format("Estimated upload cost: %s atto (%d chunks)", cost.cost, cost.chunk_count))
diff --git a/antd-lua/examples/05-graph.lua b/antd-lua/examples/05-graph.lua
index 8f1dbd5..210e371 100644
--- a/antd-lua/examples/05-graph.lua
+++ b/antd-lua/examples/05-graph.lua
@@ -47,4 +47,4 @@ if err4 then
     os.exit(1)
 end
 
-print("Estimated cost: " .. cost .. " atto")
+print(string.format("Estimated cost: %s atto (%d chunks)", cost.cost, cost.chunk_count))