feat: Cloudflare Worker Conversion

[zhaog100]

Convert to Cloudflare Worker

Closes #92

Changes

New: src/worker.ts — Cloudflare Worker entry point

• GET / — Health check endpoint returning service status and version
• POST / — Webhook handler for permit generation and wallet registration
• Full CORS support on all responses
• Environment variable validation using TypeBox schemas
• Structured error handling with proper HTTP status codes

Configuration

• Updated wrangler.toml with proper Worker config, nodejs_compat flag, and secrets documentation
• Added wrangler dev, wrangler deploy, and cf-build scripts to package.json
• Updated tsup.config.ts to include the worker entry point

Node.js → Web API Migration

• Replaced Buffer.from(...).toString("base64") with btoa() in encode-decode.ts
• Replaced process.env.X25519_PRIVATE_KEY with context.env.X25519_PRIVATE_KEY in ERC20 permit handler (with fallback for backward compat)
• Removed dotenv/config import from src/types/env.ts
• Added X25519_PRIVATE_KEY to the environment schema

Backward Compatibility

• The existing GitHub Actions entry point (src/main.ts) is preserved
• The library exports (src/index.ts) remain unchanged
• ERC20/ERC721 handlers work with both Context and Payload overloads as before

Testing

# Local development
npm run dev

# Health check
curl http://localhost:8787/

# Generate permits
curl -X POST http://localhost:8787/ \
  -H "Content-Type: application/json" \
  -d '{"eventName":"issues.closed","eventPayload":{...},"settings":{...},"authToken":"..."}'

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Configuration used: Organization UI

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Run ID: 85b2823b-9681-4cf3-b9fa-2126aad226b2

📥 Commits

Reviewing files that changed from the base of the PR and between 6bcfa62 and 3aa987d.

📒 Files selected for processing (7)

• package.json
• src/handlers/encode-decode.ts
• src/handlers/generate-erc20-permit.ts
• src/types/env.ts
• src/worker.ts
• tsup.config.ts
• wrangler.toml

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[github-actions]

Unused dependencies (1)

Filename	dependencies
package.json	dotenv

Unlisted binaries (1)

Filename	binaries
package.json	wrangler