/**
 * Process-lifetime x402_pay settlement receipts.
 *
 * createX402Client is constructed per x402_pay call, so the SDK
 * transaction log is discarded when the handler returns. This log keeps
 * the last settled x402 payments so get_transaction_history can show the
 * golden path (tx hash, payee, amount, token, URL) and whether MCP retries
 * replayed that settlement instead of broadcasting again.
 *
 * Same lifetime as spend-intent. Not a durable cross-process ledger.
 * Keyless spend intents may settle again after SEND_TOKEN_INTENT_TTL_MS
 * with the same intent key; each distinct tx hash is its own generation.
 */
export declare const X402_SETTLEMENT_LOG_MAX = 256;
export interface X402SettlementReceipt {
    intentKey: string;
    /** Final URL of the paid response. Under redirects this may differ from the endpoint that issued the 402. */
    url: string;
    /** Caller-supplied URL, when it differs from `url`. */
    requestedUrl?: string;
    /** Paid retry failed, so the redirect target that issued the 402 is unknown. */
    finalUrlUnknown?: boolean;
    /** Monotonic order captured when the payment callback ran. */
    seq?: number;
    method: string;
    amount: string;
    token: string;
    recipient: string;
    txHash: string;
    settledAt: number;
    replayCount: number;
    lastReplayAt?: number;
}
/** Call from onPaymentComplete to capture callback order (timestamps are whole seconds). */
export declare function nextX402SettlementSeq(): number;
export declare function recordX402Settlement(entry: {
    intentKey: string;
    url: string;
    requestedUrl?: string;
    /** Paid retry failed, so the redirect target that issued the 402 is unknown. */
    finalUrlUnknown?: boolean;
    /** Monotonic order captured when the payment callback ran. */
    seq?: number;
    method: string;
    amount: string;
    token: string;
    recipient: string;
    txHash: string;
    /** Payment callback time (ms). Defaults to now. */
    settledAt?: number;
}): X402SettlementReceipt;
export declare function recordX402SettlementReplay(intentKey: string): X402SettlementReceipt | undefined;
/** Receipts ordered oldest → newest by payment callback time (stable). */
export declare function listX402Settlements(): X402SettlementReceipt[];
export declare function _resetX402SettlementLog(): void;
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