r402-near 0.17.1

NEAR chain support for the x402 payment protocol.
Documentation

r402-near

NEAR chain support for the x402 payment protocol, part of the r402 workspace.

Highlights

  • Exact scheme — one NEP-141 ft_transfer authorized as a NEP-366 SignedDelegate. The facilitator relayer submits the outer transaction and reports success only when the inner ft_transfer receipt succeeds.
  • CAIP-2 networks — near:mainnet and near:testnet.
  • No client extra — the relayer is facilitator-local. price_tag sets enricher: None. supported().signers["near:*"] lists relayer account IDs.
  • In-process facilitator — verify and settle against FastNEAR JSON-RPC (overridable). Duplicate settle is blocked by SettlementCache (120s TTL) keyed by the base64 delegate.

Cargo Features

Feature Surface
client Buyer-side NEP-366 delegate signing.
server Server-side PriceTag generation.
facilitator On-chain verify and settle (JSON-RPC).
telemetry tracing instrumentation.
full All of the above.

Quick Start (server price tag)

use r402_near::{NearExact, USDC};

let tag = NearExact::price_tag(pay_to, USDC::near_testnet().amount(1_000_000u128));

Documentation

License

Dual-licensed under MIT and Apache-2.0.