import type { BitcoinMerkleProofResponse, UTXO } from "../types/bitcoin.js";
export interface NormalizedUTXO {
    txid: string;
    vout: number;
    amount: bigint;
    path?: string;
    rawTx?: Uint8Array;
}
export type FeeCalculator = (inputCount: number, outputCount: number) => bigint;
export interface UtxoSelectionOptions {
    feeCalculator: FeeCalculator;
    dustThreshold: bigint;
    minChange?: bigint | undefined;
    maxInputs?: number | undefined;
    sort?: "largest-first" | "smallest-first" | undefined;
}
export interface UtxoSelectionResult {
    inputs: NormalizedUTXO[];
    totalInput: bigint;
    fee: bigint;
    change: bigint;
    outputs: number;
}
export interface LinearFeeParameters {
    base: number;
    input: number;
    output: number;
    rate: number;
}
export interface UtxoDepositProof {
    merkle_proof: string[];
    tx_block_blockhash: string;
    tx_bytes: number[];
    tx_index: number;
    amount: bigint;
}
export interface UtxoWithdrawalPlan {
    inputs: string[];
    outputs: {
        value: number;
        script_pubkey: string;
    }[];
    fee: bigint;
}
export type UtxoPlanOverrides = Partial<Omit<UtxoSelectionOptions, "feeCalculator" | "dustThreshold" | "minChange">> & {
    dustThreshold?: bigint;
    minChange?: bigint;
};
export interface UtxoChainService {
    buildWithdrawalPlan(utxos: UTXO[], amount: bigint, targetAddress: string, changeAddress: string, feeRate?: number, overrides?: UtxoPlanOverrides): UtxoWithdrawalPlan;
    getDepositProof(txHash: string, vout: number): Promise<UtxoDepositProof>;
    getMerkleProof(txHash: string): Promise<BitcoinMerkleProofResponse>;
    broadcastTransaction(txHex: string): Promise<string>;
}
export declare function linearFeeCalculator(params: LinearFeeParameters): FeeCalculator;
export declare function buildBitcoinMerkleProof(txids: string[], targetTxid: string): {
    index: number;
    merkle: string[];
};
export declare const SIMPLE_UTXO_DEFAULTS: UtxoSelectionOptions;
export declare function selectUtxos(utxos: NormalizedUTXO[], amount: bigint, options: UtxoSelectionOptions): UtxoSelectionResult;
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