import { Hex } from 'viem';
/**
 * Thrown when the broadcast transport rejects the refund tx because the CSV
 * timelock has not yet matured (BIP68 non-final). Callers can surface a
 * friendly "wait until block N" message; the original transport error is
 * available via {@link cause}.
 */
export declare class BIP68NotMatureError extends Error {
    readonly vaultId: Hex;
    readonly cause: Error;
    constructor(vaultId: Hex, cause: Error);
}
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