Thank you for creating this bounty! We had previously submitted an entry for the near-json-rpc-ts bounty (though we didn’t win). We’re excited to give this one a shot as well!

The service hits 631 transfers/second on sandbox and 174 transfers/second on testnet using 5 access keys (note: scales with more keys). Built with TypeScript/Bun using @eclipseeer/near-api-ts, it features batching (up to 100 transfers per transaction), automatic storage deposit handling, and robust retry mechanisms. Everything is MIT-licensed with full documentation, tests, and benchmarks included.

Quick Links:

• ✅ Github: https://github.com/saka-labs/near-ft-transfers

• 🌐 Live API + Swagger UI: https://near-ft-transfers.sakalabs.dev/ui

• 📦 Testnet contract: saka-labs.testnet

• 📊 Benchmarks: 100% success rate, sub-10ms queueing, verified balance accuracy: https://github.com/saka-labs/near-ft-transfers?tab=readme-ov-file#benchmarking

• 🏗️ Architecture: SQLite queue, concurrent processing with multiple keys, graceful failure recovery: https://github.com/saka-labs/near-ft-transfers?tab=readme-ov-file#architecture