fix(evm-wallet-experiment): detect prettified errors in plugin, remove dead code

- Fix error detection in openclaw plugin daemon.ts: prettifySmallcaps
  converts #error CapData objects to strings like "[TypeError: msg]",
  so the old object-shape check never matched. Use string-prefix check.
- Remove unused json_value() from setup-away.sh.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: sirtimid

packages/evm-wallet-experiment/openclaw-plugin/daemon.ts

@@ -146,12 +146,10 @@ async function callWallet(options: WalletCallOptions): Promise<unknown> {
     throw new Error(`Wallet ${method} returned non-JSON output`);
   }
 
-  // Handle error objects from vat exceptions (decoded by prettifySmallcaps)
-  if (decoded !== null && typeof decoded === 'object' && '#error' in decoded) {
-    const errorMsg = (decoded as Record<string, unknown>)['#error'];
-    throw new Error(
-      `Wallet ${method} failed: ${typeof errorMsg === 'string' ? errorMsg : JSON.stringify(errorMsg)}`,
-    );
+  // prettifySmallcaps converts #error objects to strings like "[TypeError: msg]".
+  // Detect these prettified error strings and throw them as proper errors.
+  if (typeof decoded === 'string' && decoded.startsWith('[')) {
+    throw new Error(`Wallet ${method} failed: ${decoded}`);
   }
 
   return decoded;

packages/evm-wallet-experiment/scripts/setup-away.sh

@@ -162,14 +162,6 @@ info()  { echo -e "${CYAN}→${RESET} $*" >&2; }
 ok()    { echo -e "  ${GREEN}✓${RESET} $*" >&2; }
 fail()  { echo -e "  ${RED}✗${RESET} $*" >&2; exit 1; }
 
-# Decode JSON output — for strings, output the raw value; for other types, output JSON.
-json_value() {
-  node -e "
-    const v = JSON.parse(require('fs').readFileSync('/dev/stdin','utf8').trim());
-    process.stdout.write(typeof v === 'string' ? v : JSON.stringify(v));
-  "
-}
-
 # Run a daemon exec command and log its output to stderr.
 # Usage: daemon_exec [--quiet] <method> <params> [--timeout <seconds>]
 # Pass --quiet to suppress the stderr log line (for sensitive params).