import { Transaction } from "@scure/btc-signer";
import { RelativeTimelock } from "../script/tapscript";
export interface TreeNode {
    txid: string;
    tx: string;
    parentTxid: string;
    leaf: boolean;
}
export declare class TxTreeError extends Error {
    constructor(message: string);
}
export declare const ErrLeafNotFound: TxTreeError;
export declare const ErrParentNotFound: TxTreeError;
export declare class TxTree {
    private tree;
    constructor(tree: TreeNode[][]);
    get levels(): TreeNode[][];
    root(): TreeNode;
    leaves(): TreeNode[];
    children(nodeTxid: string): TreeNode[];
    numberOfNodes(): number;
    branch(vtxoTxid: string): TreeNode[];
    private findParent;
    validate(): void;
}
export declare function getVtxoTreeExpiry(input: {
    unknown?: {
        key: Uint8Array;
        value: Uint8Array;
    }[];
}): RelativeTimelock | null;
export declare function getCosignerKeys(tx: Transaction): Uint8Array[];