Crate r402_algorand 

Algorand chain support for the x402 payment protocol.

This crate implements the x402 "exact" scheme for Algorand: the buyer builds an atomic transaction group containing an ASA transfer and an optional facilitator-sponsored 0-amount payment that covers the group fee via fee pooling.

Features

• CAIP-2 Addressing: algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73k and algorand:SGO1GKSzyE7IEPItTxCByw9x8FmnrCDe
• ASA Payments: exact transfer of a token (USDC by default)
• Fee pooling: optional 0-amount fee-payer transaction
• In-process facilitator: algod REST verify and settle

Feature Flags

• server — server-side price tag generation
• client — client-side group construction and signing
• facilitator — facilitator-side payment verification and settlement
• telemetry — tracing instrumentation

Re-exports

pub use chain::AlgodClient;client or facilitator

pub use chain::AlgorandChainProvider;facilitator

pub use chain::AlgorandSigner;client or facilitator

pub use exact::AlgorandExact;

pub use exact::client::AlgorandExactClient;client

Modules

chain

Algorand chain support for x402 payments.

exact

Algorand "exact" payment scheme implementation.

Structs

USDC

Ergonomic accessors for USDC token deployments on well-known Algorand chains.

Constants

DEFAULT_TOKEN_DECIMALS

Default USDC decimal precision.

DEFAULT_VALIDITY_ROUNDS

Default first/last-valid window in rounds (last_round + this).

DEFAULT_WAIT_ROUNDS

Default number of rounds to wait for confirmation after broadcast.

MAX_REASONABLE_FEE_PER_TXN

Per-transaction fee cap used to bound facilitator fee-payer spend (µAlgo).

MAX_TRANSACTION_GROUP_SIZE

Maximum number of top-level transactions in an Algorand atomic group.

USDC_MAINNET_ASA_ID

Mainnet USDC ASA id.

USDC_TESTNET_ASA_ID

Testnet USDC ASA id.

Statics

ALGORAND_NETWORKS

Well-known Algorand networks with their names and CAIP-2 identifiers.

Functions

max_reasonable_group_fee

Maximum acceptable fee-payer fee for a group of group_size transactions.

usdc_algorand_deployment

Returns the USDC deployment for a specific Algorand chain, if known.

usdc_algorand_deployments

Returns all known USDC deployments on Algorand chains.