Add returnSignature Configuration Field

[chainsona]

Add returnSignature Configuration Field

Problem

The build was failing due to a type error in buildWhirlpoolsSwap.ts where the code was trying to access a returnSignature configuration field that wasn't defined in the config schema. The specific error was:

Type error: Property 'returnSignature' does not exist on type '{ rpcUrl: string; maxSignatures: number; lamportsPerSignature: number; corsOrigin: boolean; endpoints: {...} }'

Solution

Added the returnSignature field to the configuration schema in config.json. The field is configured with allowAll type, which is one of the valid options defined in returnSignature.ts.

Changes

{
    "rpcUrl": "https://api.devnet.solana.com",
    "maxSignatures": 2,
    "lamportsPerSignature": 5000,
    "corsOrigin": true,
+   "returnSignature": {
+       "type": "allowAll"
+   },
    "endpoints": {
        // ... rest of config
    }
}

Testing

• Build now completes successfully with yarn build
• All ESLint checks pass with only non-critical warnings
• The buildWhirlpoolsSwap endpoint can now properly handle signature returns based on configuration

Additional Notes

The returnSignature configuration supports two types:

1. allowAll - Allows all signature returns without additional checks
2. reCaptcha - Requires reCAPTCHA verification (not used in this PR)

For this fix, we used the allowAll type as it's the simplest configuration that resolves the build error while maintaining functionality.