import type { SettlementRecord } from './types.js';
export declare function settlementSigningPayload(record: Omit<SettlementRecord, 'signature'>): string;
/** Write-boundary twin of settlementSigningPayload().
 *
 *  Shares one implementation body with settlementSigningPayload() so the two can never drift apart
 *  on the field list. Emits the same bytes for every value it accepts; the only
 *  difference is that an integer-valued number outside the interoperable IEEE 754
 *  range is refused instead of serialized. Use at signing and new-write boundaries
 *  ONLY: settlementSigningPayload() stays unrestricted so an artifact signed before this rule keeps
 *  verifying. */
export declare function settlementSigningPayloadForWrite(record: Omit<SettlementRecord, 'signature'>): string;
/** Canonical settlement_record_hash — hex sha256 of the signing payload.
 *  Stable across Python/TS so verifiers can short-circuit signature
 *  checks to a single 32-byte commitment. */
export declare function settlementRecordHash(record: Omit<SettlementRecord, 'signature'>): string;
/** Sign a settlement record. Returns the hex signature. Callers assemble
 *  the full `SettlementRecord` by writing the signature into the record. */
export declare function signSettlementRecord(record: Omit<SettlementRecord, 'signature'>, gatewayPrivateKeyHex: string): string;
/** Verify just the Ed25519 signature on a settlement record. Returns a
 *  boolean; for full S1–S5 verification use `verifySettlementRecord`. */
export declare function verifySettlementSignature(record: SettlementRecord, gatewayPublicKeyHex: string): boolean;
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