SignX402PaymentParams

Defined in: src/x402/client.ts:165

Parameters for X402PaymentSigner.sign.

Properties

idempotencyKey?

readonly optional idempotencyKey?: string

Defined in: src/x402/client.ts:185

Optional reasoning-step idempotency key (M5-1, Half B). When supplied, the EIP-3009 nonce is derived deterministically from it (instead of random) so a re-signed same-intent payment produces the same on-chain nonce — the token contract’s authorizationState then rejects the duplicate settlement. For a byte-identical re-sign, also pin validBefore. Build the key with createIdempotencyKeyBuilder from kawasekit/idempotency.

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paymentRequirements

readonly paymentRequirements: X402PaymentRequirements

Defined in: src/x402/client.ts:167

The chosen entry from the server’s accepts array.

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resource?

readonly optional resource?: X402ResourceInfo

Defined in: src/x402/client.ts:169

Optional X402ResourceInfo to echo back in the payload.

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validAfter?

readonly optional validAfter?: bigint

Defined in: src/x402/client.ts:171

Unix-seconds override of validAfter. Defaults to 0n.

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validBefore?

readonly optional validBefore?: bigint

Defined in: src/x402/client.ts:176

Unix-seconds override of validBefore. Defaults to now + lifetime where lifetime = min(signer default, requirements.maxTimeoutSeconds).