r402-algorand

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

Highlights

• Exact scheme — an atomic group with an ASA transfer to payTo and an optional 0-amount fee-payer payment. The facilitator signs the fee-payer transaction, simulates, broadcasts, and waits for confirmation.
• CAIP-2 networks — algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73k (mainnet) and algorand:SGO1GKSzyE7IEPItTxCByw9x8FmnrCDe (testnet). On-chain gh is always the full genesis hash, not the truncated CAIP-2 reference.
• algod REST — suggested params, simulate, broadcast, and pending confirmation against AlgoNode (overridable). Transactions use canonical msgpack (sorted keys, default values omitted).
• Fee cap — fee-payer fee must be ≤ 5000 µAlgo × groupSize.

Cargo Features

Quick Start (server price tag)

use r402_algorand::{AlgorandExact, USDC};

let tag = AlgorandExact::price_tag(pay_to, USDC::algorand_testnet().amount(1_000_000u64));

Documentation

• Crate docs: https://docs.rs/r402-algorand
• Project README: ../../README.md

License

Dual-licensed under MIT and Apache-2.0.