@bitgo/babylonlabs-io-btc-staking-ts/dist/index.d.cts

Library exposing methods for the creation and consumption of Bitcoin transactions pertaining to Babylon's Bitcoin Staking protocol.

// Generated by dts-bundle-generator v9.5.1

import { btcstaking, btcstakingtx } from '@babylonlabs-io/babylon-proto-ts';
import { ProofOfPossessionBTC } from '@babylonlabs-io/babylon-proto-ts/dist/generated/babylon/btcstaking/v1/pop';
import { PsbtInputExtended } from 'bip174/src/lib/interfaces';
import { Psbt, Transaction, networks } from 'bitcoinjs-lib';
import { Input } from 'bitcoinjs-lib/src/transaction';
import { Emitter } from 'nanoevents';

/**
 * Base interface for staking parameters that define the rules and constraints
 * for staking operations.
 */
export interface StakingParams {
	covenantNoCoordPks: string[];
	covenantQuorum: number;
	unbondingTime: number;
	unbondingFeeSat: number;
	maxStakingAmountSat: number;
	minStakingAmountSat: number;
	maxStakingTimeBlocks: number;
	minStakingTimeBlocks: number;
	slashing?: {
		slashingPkScriptHex: string;
		slashingRate: number;
		minSlashingTxFeeSat: number;
	};
}
/**
 * Type for StakingParams where slashing is required
 */
export type StakingParamsWithSlashing = StakingParams & {
	slashing: NonNullable<StakingParams["slashing"]>;
};
/**
 * Type guard to check if slashing exists in StakingParams
 */
export declare function hasSlashing(params: StakingParams): params is StakingParams & {
	slashing: NonNullable<StakingParams["slashing"]>;
};
/**
 * Extension of StakingParams that includes activation height and version information.
 * These parameters are used to identify and select the appropriate staking rules at
 * different blockchain heights, but do not affect the actual staking transaction content.
 */
export interface VersionedStakingParams extends StakingParams {
	btcActivationHeight: number;
	version: number;
}
/**
 * Extension of VersionedStakingParams that includes a tag field for observability.
 */
export interface ObservableVersionedStakingParams extends VersionedStakingParams {
	tag: string;
}
/**
 * PsbtResult is an object containing a partially signed transaction and its fee
 */
export interface PsbtResult {
	psbt: Psbt;
	fee: number;
}
/**
 * TransactionResult is an object containing an unsigned transaction and its fee
 */
export interface TransactionResult {
	transaction: Transaction;
	fee: number;
}
export interface UTXO {
	txid: string;
	vout: number;
	value: number;
	scriptPubKey: string;
	rawTxHex?: string;
	redeemScript?: string;
	witnessScript?: string;
}
export interface StakingScripts {
	timelockScript: Buffer;
	unbondingScript: Buffer;
	slashingScript: Buffer;
	unbondingTimelockScript: Buffer;
}
export declare class StakingScriptData {
	stakerKey: Buffer;
	finalityProviderKeys: Buffer[];
	covenantKeys: Buffer[];
	covenantThreshold: number;
	stakingTimeLock: number;
	unbondingTimeLock: number;
	constructor(stakerKey: Buffer, finalityProviderKeys: Buffer[], covenantKeys: Buffer[], covenantThreshold: number, stakingTimelock: number, unbondingTimelock: number);
	/**
	 * Validates the staking script.
	 * @returns {boolean} Returns true if the staking script is valid, otherwise false.
	 */
	validate(): boolean;
	/**
	 * Builds a timelock script.
	 * @param timelock - The timelock value to encode in the script.
	 * @returns {Buffer} containing the compiled timelock script.
	 */
	buildTimelockScript(timelock: number): Buffer;
	/**
	 * Builds the staking timelock script.
	 * Only holder of private key for given pubKey can spend after relative lock time
	 * Creates the timelock script in the form:
	 *    <stakerPubKey>
	 *    OP_CHECKSIGVERIFY
	 *    <stakingTimeBlocks>
	 *    OP_CHECKSEQUENCEVERIFY
	 * @returns {Buffer} The staking timelock script.
	 */
	buildStakingTimelockScript(): Buffer;
	/**
	 * Builds the unbonding timelock script.
	 * Creates the unbonding timelock script in the form:
	 *    <stakerPubKey>
	 *    OP_CHECKSIGVERIFY
	 *    <unbondingTimeBlocks>
	 *    OP_CHECKSEQUENCEVERIFY
	 * @returns {Buffer} The unbonding timelock script.
	 */
	buildUnbondingTimelockScript(): Buffer;
	/**
	 * Builds the unbonding script in the form:
	 *    buildSingleKeyScript(stakerPk, true) ||
	 *    buildMultiKeyScript(covenantPks, covenantThreshold, false)
	 *    || means combining the scripts
	 * @returns {Buffer} The unbonding script.
	 */
	buildUnbondingScript(): Buffer;
	/**
	 * Builds the slashing script for staking in the form:
	 *    buildSingleKeyScript(stakerPk, true) ||
	 *    buildMultiKeyScript(finalityProviderPKs, 1, true) ||
	 *    buildMultiKeyScript(covenantPks, covenantThreshold, false)
	 *    || means combining the scripts
	 * The slashing script is a combination of single-key and multi-key scripts.
	 * The single-key script is used for staker key verification.
	 * The multi-key script is used for finality provider key verification and covenant key verification.
	 * @returns {Buffer} The slashing script as a Buffer.
	 */
	buildSlashingScript(): Buffer;
	/**
	 * Builds the staking scripts.
	 * @returns {StakingScripts} The staking scripts.
	 */
	buildScripts(): StakingScripts;
	/**
	 * Builds a single key script in the form:
	 * buildSingleKeyScript creates a single key script
	 *    <pk> OP_CHECKSIGVERIFY (if withVerify is true)
	 *    <pk> OP_CHECKSIG (if withVerify is false)
	 * @param pk - The public key buffer.
	 * @param withVerify - A boolean indicating whether to include the OP_CHECKSIGVERIFY opcode.
	 * @returns The compiled script buffer.
	 */
	buildSingleKeyScript(pk: Buffer, withVerify: boolean): Buffer;
	/**
	 * Builds a multi-key script in the form:
	 *    <pk1> OP_CHEKCSIG <pk2> OP_CHECKSIGADD <pk3> OP_CHECKSIGADD ... <pkN> OP_CHECKSIGADD <threshold> OP_NUMEQUAL
	 *    <withVerify -> OP_NUMEQUALVERIFY>
	 * It validates whether provided keys are unique and the threshold is not greater than number of keys
	 * If there is only one key provided it will return single key sig script
	 * @param pks - An array of public keys.
	 * @param threshold - The required number of valid signers.
	 * @param withVerify - A boolean indicating whether to include the OP_VERIFY opcode.
	 * @returns The compiled multi-key script as a Buffer.
	 * @throws {Error} If no keys are provided, if the required number of valid signers is greater than the number of provided keys, or if duplicate keys are provided.
	 */
	buildMultiKeyScript(pks: Buffer[], threshold: number, withVerify: boolean): Buffer;
}
export interface StakerInfo {
	address: string;
	publicKeyNoCoordHex: string;
}
export declare class Staking {
	network: networks.Network;
	stakerInfo: StakerInfo;
	params: StakingParams;
	finalityProviderPksNoCoordHex: string[];
	stakingTimelock: number;
	constructor(network: networks.Network, stakerInfo: StakerInfo, params: StakingParams, finalityProviderPksNoCoordHex: string[], stakingTimelock: number);
	/**
	 * buildScripts builds the staking scripts for the staking transaction.
	 * Note: different staking types may have different scripts.
	 * e.g the observable staking script has a data embed script.
	 *
	 * @returns {StakingScripts} - The staking scripts.
	 */
	buildScripts(): StakingScripts;
	/**
	 * Create a staking transaction for staking.
	 *
	 * @param {number} stakingAmountSat - The amount to stake in satoshis.
	 * @param {UTXO[]} inputUTXOs - The UTXOs to use as inputs for the staking
	 * transaction.
	 * @param {number} feeRate - The fee rate for the transaction in satoshis per byte.
	 * @returns {TransactionResult} - An object containing the unsigned
	 * transaction, and fee
	 * @throws {StakingError} - If the transaction cannot be built
	 */
	createStakingTransaction(stakingAmountSat: number, inputUTXOs: UTXO[], feeRate: number): TransactionResult;
	/**
	 * Creates a staking expansion transaction that extends an existing BTC stake
	 * to new finality providers or renews the timelock.
	 *
	 * This method implements RFC 037 BTC Stake Expansion,
	 * allowing existing active BTC staking transactions
	 * to extend their delegation to new finality providers without going through
	 * the full unbonding process.
	 *
	 * The expansion transaction:
	 * 1. Spends the previous staking transaction output as the first input
	 * 2. Uses funding UTXO as additional input to cover transaction fees or
	 *    to increase the staking amount
	 * 3. Creates a new staking output with expanded finality provider coverage or
	 *    renews the timelock
	 * 4. Has an output returning the remaining funds as change (if any) to the
	 * staker BTC address
	 *
	 * @param {number} stakingAmountSat - The total staking amount in satoshis
	 * (The amount had to be equal to the previous staking amount for now, this
	 * lib does not yet support increasing the staking amount at this stage)
	 * @param {UTXO[]} inputUTXOs - Available UTXOs to use for funding the
	 * expansion transaction fees. Only one will be selected for the expansion
	 * @param {number} feeRate - Fee rate in satoshis per byte for the
	 * expansion transaction
	 * @param {StakingParams} paramsForPreviousStakingTx - Staking parameters
	 * used in the previous staking transaction
	 * @param {Object} previousStakingTxInfo - Necessary information to spend the
	 * previous staking transaction.
	 * @returns {TransactionResult & { fundingUTXO: UTXO }} - An object containing
	 * the unsigned expansion transaction and calculated fee, and the funding UTXO
	 * @throws {StakingError} - If the transaction cannot be built or validation
	 * fails
	 */
	createStakingExpansionTransaction(stakingAmountSat: number, inputUTXOs: UTXO[], feeRate: number, paramsForPreviousStakingTx: StakingParams, previousStakingTxInfo: {
		stakingTx: Transaction;
		stakingInput: {
			finalityProviderPksNoCoordHex: string[];
			stakingTimelock: number;
		};
	}): TransactionResult & {
		fundingUTXO: UTXO;
	};
	/**
	 * Create a staking psbt based on the existing staking transaction.
	 *
	 * @param {Transaction} stakingTx - The staking transaction.
	 * @param {UTXO[]} inputUTXOs - The UTXOs to use as inputs for the staking
	 * transaction. The UTXOs that were used to create the staking transaction should
	 * be included in this array.
	 * @returns {Psbt} - The psbt.
	 */
	toStakingPsbt(stakingTx: Transaction, inputUTXOs: UTXO[]): Psbt;
	/**
	 * Convert a staking expansion transaction to a PSBT.
	 *
	 * @param {Transaction} stakingExpansionTx - The staking expansion
	 * transaction to convert
	 * @param {UTXO[]} inputUTXOs - Available UTXOs for the
	 * funding input (second input)
	 * @param {StakingParams} paramsForPreviousStakingTx - Staking parameters
	 * used for the previous staking transaction
	 * @param {Object} previousStakingTxInfo - Information about the previous
	 * staking transaction
	 * @returns {Psbt} The PSBT for the staking expansion transaction
	 * @throws {Error} If the previous staking output cannot be found or
	 * validation fails
	 */
	toStakingExpansionPsbt(stakingExpansionTx: Transaction, inputUTXOs: UTXO[], paramsForPreviousStakingTx: StakingParams, previousStakingTxInfo: {
		stakingTx: Transaction;
		stakingInput: {
			finalityProviderPksNoCoordHex: string[];
			stakingTimelock: number;
		};
	}): Psbt;
	/**
	 * Create an unbonding transaction for staking.
	 *
	 * @param {Transaction} stakingTx - The staking transaction to unbond.
	 * @returns {TransactionResult} - An object containing the unsigned
	 * transaction, and fee
	 * @throws {StakingError} - If the transaction cannot be built
	 */
	createUnbondingTransaction(stakingTx: Transaction): TransactionResult;
	/**
	 * Create an unbonding psbt based on the existing unbonding transaction and
	 * staking transaction.
	 *
	 * @param {Transaction} unbondingTx - The unbonding transaction.
	 * @param {Transaction} stakingTx - The staking transaction.
	 *
	 * @returns {Psbt} - The psbt.
	 */
	toUnbondingPsbt(unbondingTx: Transaction, stakingTx: Transaction): Psbt;
	/**
	 * Creates a withdrawal transaction that spends from an unbonding or slashing
	 * transaction. The timelock on the input transaction must have expired before
	 * this withdrawal can be valid.
	 *
	 * @param {Transaction} earlyUnbondedTx - The unbonding or slashing
	 * transaction to withdraw from
	 * @param {number} feeRate - Fee rate in satoshis per byte for the withdrawal
	 * transaction
	 * @returns {PsbtResult} - Contains the unsigned PSBT and fee amount
	 * @throws {StakingError} - If the input transaction is invalid or withdrawal
	 * transaction cannot be built
	 */
	createWithdrawEarlyUnbondedTransaction(earlyUnbondedTx: Transaction, feeRate: number): PsbtResult;
	/**
	 * Create a withdrawal psbt that spends a naturally expired staking
	 * transaction.
	 *
	 * @param {Transaction} stakingTx - The staking transaction to withdraw from.
	 * @param {number} feeRate - The fee rate for the transaction in satoshis per byte.
	 * @returns {PsbtResult} - An object containing the unsigned psbt and fee
	 * @throws {StakingError} - If the delegation is invalid or the transaction cannot be built
	 */
	createWithdrawStakingExpiredPsbt(stakingTx: Transaction, feeRate: number): PsbtResult;
	/**
	 * Create a slashing psbt spending from the staking output.
	 *
	 * @param {Transaction} stakingTx - The staking transaction to slash.
	 * @returns {PsbtResult} - An object containing the unsigned psbt and fee
	 * @throws {StakingError} - If the delegation is invalid or the transaction cannot be built
	 */
	createStakingOutputSlashingPsbt(stakingTx: Transaction): PsbtResult;
	/**
	 * Create a slashing psbt for an unbonding output.
	 *
	 * @param {Transaction} unbondingTx - The unbonding transaction to slash.
	 * @returns {PsbtResult} - An object containing the unsigned psbt and fee
	 * @throws {StakingError} - If the delegation is invalid or the transaction cannot be built
	 */
	createUnbondingOutputSlashingPsbt(unbondingTx: Transaction): PsbtResult;
	/**
	 * Create a withdraw slashing psbt that spends a slashing transaction from the
	 * staking output.
	 *
	 * @param {Transaction} slashingTx - The slashing transaction.
	 * @param {number} feeRate - The fee rate for the transaction in satoshis per byte.
	 * @returns {PsbtResult} - An object containing the unsigned psbt and fee
	 * @throws {StakingError} - If the delegation is invalid or the transaction cannot be built
	 */
	createWithdrawSlashingPsbt(slashingTx: Transaction, feeRate: number): PsbtResult;
}
export type RegistrationStep = "staking-slashing" | "unbonding-slashing" | "proof-of-possession" | "create-btc-delegation-msg";
export type WithdrawalType = "staking-expired" | "early-unbonded" | "slashing";
export type EventData = Record<string, string | number | string[] | number[]>;
export interface ManagerEvents {
	"delegation:create": (data?: EventData) => void;
	"delegation:register": (data?: EventData) => void;
	"delegation:stake": (data?: EventData) => void;
	"delegation:unbond": (data?: EventData) => void;
	"delegation:withdraw": (data?: EventData) => void;
	"delegation:expand": (data?: EventData) => void;
}
export type DelegationEvent = keyof ManagerEvents;
export interface Action {
	name: ActionName;
}
declare enum ActionName {
	SIGN_BTC_STAKING_TRANSACTION = "sign-btc-staking-transaction",
	SIGN_BTC_UNBONDING_TRANSACTION = "sign-btc-unbonding-transaction",
	SIGN_BTC_WITHDRAW_TRANSACTION = "sign-btc-withdraw-transaction",
	SIGN_BTC_SLASHING_TRANSACTION = "sign-btc-slashing-transaction",
	SIGN_BTC_UNBONDING_SLASHING_TRANSACTION = "sign-btc-unbonding-slashing-transaction"
}
export interface Contract {
	id: ContractId;
	params: ContractData;
}
declare enum ContractId {
	STAKING = "babylon:staking",
	UNBONDING = "babylon:unbonding",
	SLASHING = "babylon:slashing",
	WITHDRAW = "babylon:withdraw",
	SLASHING_BURN = "babylon:slashing-burn"
}
export type ContractData = Record<string, string | number | string[] | number[]>;
export interface SignPsbtOptions {
	contracts: Contract[];
	action: Action;
}
export interface BtcProvider {
	signPsbt(psbtHex: string, options?: SignPsbtOptions): Promise<string>;
	signMessage: (message: string, type: "ecdsa" | "bip322-simple") => Promise<string>;
	getTransactionHex(txid: string): Promise<string>;
}
export interface BabylonProvider {
	/**
	 * Signs a Babylon chain transaction.
	 * This is primarily used for signing MsgCreateBTCDelegation transactions
	 * which register the BTC delegation on the Babylon Genesis chain.
	 *
	 * @param {object} msg - The Cosmos SDK transaction message to sign
	 * @param {string} msg.typeUrl - The Protobuf type URL identifying the message type
	 * @param {T} msg.value - The transaction message data matching the typeUrl
	 * @returns {Promise<Uint8Array>} The signed transaction bytes
	 */
	signTransaction: <T extends object>(msg: {
		typeUrl: string;
		value: T;
	}) => Promise<Uint8Array>;
	/**
	 * Gets the current height of the Babylon Genesis chain.
	 *
	 * @returns {Promise<number>} The current Babylon chain height
	 */
	getCurrentHeight?: () => Promise<number>;
	/**
	 * Gets the chain ID of the Babylon Genesis chain.
	 *
	 * @returns {Promise<string>} The Babylon chain ID
	 */
	getChainId?: () => Promise<string>;
}
export interface StakingInputs {
	finalityProviderPksNoCoordHex: string[];
	stakingAmountSat: number;
	stakingTimelock: number;
}
export interface InclusionProof {
	pos: number;
	merkle: string[];
	blockHashHex: string;
}
/**
 * Upgrade configuration for Babylon POP (Proof of Possession) context.
 * This is used to determine when to switch to the new POP context format
 * based on the Babylon chain height and version.
 */
export interface UpgradeConfig {
	/**
	 * POP context upgrade configuration.
	 */
	pop?: PopUpgradeConfig;
}
/**
 * Configuration for POP context upgrade.
 * - upgradeHeight: The Babylon chain height at which the POP context upgrade is activated.
 * - version: The version of the POP context to use after the upgrade.
 */
export interface PopUpgradeConfig {
	/**
	 * The Babylon chain height at which the POP context upgrade is activated.
	 */
	upgradeHeight: number;
	/**
	 * The version of the POP context to use after the upgrade.
	 */
	version: number;
}
export declare class BabylonBtcStakingManager {
	protected network: networks.Network;
	protected stakingParams: VersionedStakingParams[];
	protected btcProvider: BtcProvider;
	protected babylonProvider: BabylonProvider;
	protected ee?: Emitter<ManagerEvents> | undefined;
	private upgradeConfig?;
	constructor(network: networks.Network, stakingParams: VersionedStakingParams[], btcProvider: BtcProvider, babylonProvider: BabylonProvider, ee?: Emitter<ManagerEvents> | undefined, upgradeConfig?: UpgradeConfig);
	/**
	 * Creates a signed Pre-Staking Registration transaction that is ready to be
	 * sent to the Babylon chain.
	 * @param stakerBtcInfo - The staker BTC info which includes the BTC address
	 * and the no-coord public key in hex format.
	 * @param stakingInput - The staking inputs.
	 * @param babylonBtcTipHeight - The Babylon BTC tip height.
	 * @param inputUTXOs - The UTXOs that will be used to pay for the staking
	 * transaction.
	 * @param feeRate - The fee rate in satoshis per byte. Typical value for the
	 * fee rate is above 1. If the fee rate is too low, the transaction will not
	 * be included in a block.
	 * @param babylonAddress - The Babylon bech32 encoded address of the staker.
	 * @returns The signed babylon pre-staking registration transaction in base64
	 * format.
	 */
	preStakeRegistrationBabylonTransaction(stakerBtcInfo: StakerInfo, stakingInput: StakingInputs, babylonBtcTipHeight: number, inputUTXOs: UTXO[], feeRate: number, babylonAddress: string): Promise<{
		signedBabylonTx: Uint8Array;
		stakingTx: Transaction;
	}>;
	/**
	 * Create a signed staking expansion transaction that is ready to be sent to
	 * the Babylon chain.
	 */
	stakingExpansionRegistrationBabylonTransaction(stakerBtcInfo: StakerInfo, stakingInput: StakingInputs, babylonBtcTipHeight: number, inputUTXOs: UTXO[], feeRate: number, babylonAddress: string, previousStakingTxInfo: {
		stakingTx: Transaction;
		paramVersion: number;
		stakingInput: StakingInputs;
	}): Promise<{
		signedBabylonTx: Uint8Array;
		stakingTx: Transaction;
	}>;
	/**
	 * Estimates the transaction fee for a BTC staking expansion transaction.
	 *
	 * @param {StakerInfo} stakerBtcInfo - The staker's Bitcoin information
	 * including address and public key
	 * @param {number} babylonBtcTipHeight - The current Babylon BTC tip height
	 * used to determine staking parameters
	 * @param {StakingInputs} stakingInput - The new staking input parameters for
	 * the expansion
	 * @param {UTXO[]} inputUTXOs - Available UTXOs that can be used for funding
	 * the expansion transaction
	 * @param {number} feeRate - Fee rate in satoshis per byte for the expansion
	 * transaction
	 * @param {Object} previousStakingTxInfo - Information about the previous
	 * staking transaction being expanded
	 * @returns {number} - The estimated transaction fee in satoshis
	 * @throws {Error} - If validation fails or the fee cannot be calculated
	 */
	estimateBtcStakingExpansionFee(stakerBtcInfo: StakerInfo, babylonBtcTipHeight: number, stakingInput: StakingInputs, inputUTXOs: UTXO[], feeRate: number, previousStakingTxInfo: {
		stakingTx: Transaction;
		paramVersion: number;
		stakingInput: StakingInputs;
	}): number;
	/**
	 * Creates a signed post-staking registration transaction that is ready to be
	 * sent to the Babylon chain. This is used when a staking transaction is
	 * already created and included in a BTC block and we want to register it on
	 * the Babylon chain.
	 * @param stakerBtcInfo - The staker BTC info which includes the BTC address
	 * and the no-coord public key in hex format.
	 * @param stakingTx - The staking transaction.
	 * @param stakingTxHeight - The BTC height in which the staking transaction
	 * is included.
	 * @param stakingInput - The staking inputs.
	 * @param inclusionProof - Merkle Proof of Inclusion: Verifies transaction
	 * inclusion in a Bitcoin block that is k-deep.
	 * @param babylonAddress - The Babylon bech32 encoded address of the staker.
	 * @returns The signed babylon transaction in base64 format.
	 */
	postStakeRegistrationBabylonTransaction(stakerBtcInfo: StakerInfo, stakingTx: Transaction, stakingTxHeight: number, stakingInput: StakingInputs, inclusionProof: InclusionProof, babylonAddress: string): Promise<{
		signedBabylonTx: Uint8Array;
	}>;
	/**
	 * Estimates the BTC fee required for staking.
	 * @param stakerBtcInfo - The staker BTC info which includes the BTC address
	 * and the no-coord public key in hex format.
	 * @param babylonBtcTipHeight - The BTC tip height recorded on the Babylon
	 * chain.
	 * @param stakingInput - The staking inputs.
	 * @param inputUTXOs - The UTXOs that will be used to pay for the staking
	 * transaction.
	 * @param feeRate - The fee rate in satoshis per byte. Typical value for the
	 * fee rate is above 1. If the fee rate is too low, the transaction will not
	 * be included in a block.
	 * @returns The estimated BTC fee in satoshis.
	 */
	estimateBtcStakingFee(stakerBtcInfo: StakerInfo, babylonBtcTipHeight: number, stakingInput: StakingInputs, inputUTXOs: UTXO[], feeRate: number): number;
	/**
	 * Creates a signed staking transaction that is ready to be sent to the BTC
	 * network.
	 * @param stakerBtcInfo - The staker BTC info which includes the BTC address
	 * and the no-coord public key in hex format.
	 * @param stakingInput - The staking inputs.
	 * @param unsignedStakingTx - The unsigned staking transaction.
	 * @param inputUTXOs - The UTXOs that will be used to pay for the staking
	 * transaction.
	 * @param stakingParamsVersion - The params version that was used to create the
	 * delegation in Babylon chain
	 * @returns The signed staking transaction.
	 */
	createSignedBtcStakingTransaction(stakerBtcInfo: StakerInfo, stakingInput: StakingInputs, unsignedStakingTx: Transaction, inputUTXOs: UTXO[], stakingParamsVersion: number): Promise<Transaction>;
	/**
	 * Creates a signed staking expansion transaction that is ready to be sent to
	 * the BTC network.
	 *
	 * @param {StakerInfo} stakerBtcInfo - The staker's BTC information including
	 * address and public key
	 * @param {StakingInputs} stakingInput - The staking inputs for the expansion
	 * @param {Transaction} unsignedStakingExpansionTx - The unsigned staking
	 * expansion transaction
	 * @param {UTXO[]} inputUTXOs - Available UTXOs for the funding input
	 * @param {number} stakingParamsVersion - The version of staking parameters
	 * that was used when registering the staking expansion delegation.
	 * @param {Object} previousStakingTxInfo - Information about the previous
	 * staking transaction
	 * @param {Array} covenantStakingExpansionSignatures - Covenant committee
	 * signatures for the expansion
	 * @returns {Promise<Transaction>} The fully signed staking expansion
	 * transaction
	 * @throws {Error} If signing fails, validation fails, or required data is
	 * missing
	 */
	createSignedBtcStakingExpansionTransaction(stakerBtcInfo: StakerInfo, stakingInput: StakingInputs, unsignedStakingExpansionTx: Transaction, inputUTXOs: UTXO[], stakingParamsVersion: number, previousStakingTxInfo: {
		stakingTx: Transaction;
		paramVersion: number;
		stakingInput: StakingInputs;
	}, covenantStakingExpansionSignatures: {
		btcPkHex: string;
		sigHex: string;
	}[]): Promise<Transaction>;
	/**
	 * Creates a partial signed unbonding transaction that is only signed by the
	 * staker. In order to complete the unbonding transaction, the covenant
	 * unbonding signatures need to be added to the transaction before sending it
	 * to the BTC network.
	 * NOTE: This method should only be used for Babylon phase-1 unbonding.
	 * @param stakerBtcInfo - The staker BTC info which includes the BTC address
	 * and the no-coord public key in hex format.
	 * @param stakingInput - The staking inputs.
	 * @param stakingParamsVersion - The params version that was used to create the
	 * delegation in Babylon chain
	 * @param stakingTx - The staking transaction.
	 * @returns The partial signed unbonding transaction and its fee.
	 */
	createPartialSignedBtcUnbondingTransaction(stakerBtcInfo: StakerInfo, stakingInput: StakingInputs, stakingParamsVersion: number, stakingTx: Transaction): Promise<TransactionResult>;
	/**
	 * Creates a signed unbonding transaction that is ready to be sent to the BTC
	 * network.
	 * @param stakerBtcInfo - The staker BTC info which includes the BTC address
	 * and the no-coord public key in hex format.
	 * @param stakingInput - The staking inputs.
	 * @param stakingParamsVersion - The params version that was used to create the
	 * delegation in Babylon chain
	 * @param stakingTx - The staking transaction.
	 * @param unsignedUnbondingTx - The unsigned unbonding transaction.
	 * @param covenantUnbondingSignatures - The covenant unbonding signatures.
	 * It can be retrieved from the Babylon chain or API.
	 * @returns The signed unbonding transaction and its fee.
	 */
	createSignedBtcUnbondingTransaction(stakerBtcInfo: StakerInfo, stakingInput: StakingInputs, stakingParamsVersion: number, stakingTx: Transaction, unsignedUnbondingTx: Transaction, covenantUnbondingSignatures: {
		btcPkHex: string;
		sigHex: string;
	}[]): Promise<TransactionResult>;
	/**
	 * Creates a signed withdrawal transaction on the unbodning output expiry path
	 * that is ready to be sent to the BTC network.
	 * @param stakingInput - The staking inputs.
	 * @param stakingParamsVersion - The params version that was used to create the
	 * delegation in Babylon chain
	 * @param earlyUnbondingTx - The early unbonding transaction.
	 * @param feeRate - The fee rate in satoshis per byte. Typical value for the
	 * fee rate is above 1. If the fee rate is too low, the transaction will not
	 * be included in a block.
	 * @returns The signed withdrawal transaction and its fee.
	 */
	createSignedBtcWithdrawEarlyUnbondedTransaction(stakerBtcInfo: StakerInfo, stakingInput: StakingInputs, stakingParamsVersion: number, earlyUnbondingTx: Transaction, feeRate: number): Promise<TransactionResult>;
	/**
	 * Creates a signed withdrawal transaction on the staking output expiry path
	 * that is ready to be sent to the BTC network.
	 * @param stakerBtcInfo - The staker BTC info which includes the BTC address
	 * and the no-coord public key in hex format.
	 * @param stakingInput - The staking inputs.
	 * @param stakingParamsVersion - The params version that was used to create the
	 * delegation in Babylon chain
	 * @param stakingTx - The staking transaction.
	 * @param feeRate - The fee rate in satoshis per byte. Typical value for the
	 * fee rate is above 1. If the fee rate is too low, the transaction will not
	 * be included in a block.
	 * @returns The signed withdrawal transaction and its fee.
	 */
	createSignedBtcWithdrawStakingExpiredTransaction(stakerBtcInfo: StakerInfo, stakingInput: StakingInputs, stakingParamsVersion: number, stakingTx: Transaction, feeRate: number): Promise<TransactionResult>;
	/**
	 * Creates a signed withdrawal transaction for the expired slashing output that
	 * is ready to be sent to the BTC network.
	 * @param stakerBtcInfo - The staker BTC info which includes the BTC address
	 * and the no-coord public key in hex format.
	 * @param stakingInput - The staking inputs.
	 * @param stakingParamsVersion - The params version that was used to create the
	 * delegation in Babylon chain
	 * @param slashingTx - The slashing transaction.
	 * @param feeRate - The fee rate in satoshis per byte. Typical value for the
	 * fee rate is above 1. If the fee rate is too low, the transaction will not
	 * be included in a block.
	 * @returns The signed withdrawal transaction and its fee.
	 */
	createSignedBtcWithdrawSlashingTransaction(stakerBtcInfo: StakerInfo, stakingInput: StakingInputs, stakingParamsVersion: number, slashingTx: Transaction, feeRate: number): Promise<TransactionResult>;
	/**
	 * Creates a proof of possession for the staker based on ECDSA signature.
	 * @param bech32Address - The staker's bech32 address.
	 * @returns The proof of possession.
	 */
	createProofOfPossession(channel: "delegation:create" | "delegation:register" | "delegation:expand", bech32Address: string, stakerBtcAddress: string): Promise<ProofOfPossessionBTC>;
	/**
	 * Creates the unbonding, slashing, and unbonding slashing transactions and
	 * PSBTs.
	 * @param stakingInstance - The staking instance.
	 * @param stakingTx - The staking transaction.
	 * @returns The unbonding, slashing, and unbonding slashing transactions and
	 * PSBTs.
	 */
	private createDelegationTransactionsAndPsbts;
	/**
	 * Creates a protobuf message for the BTC delegation.
	 * @param channel - The event channel to emit the message on.
	 * @param stakingInstance - The staking instance.
	 * @param stakingInput - The staking inputs.
	 * @param stakingTx - The staking transaction.
	 * @param bech32Address - The staker's babylon chain bech32 address
	 * @param stakerBtcInfo - The staker's BTC information such as address and
	 * public key
	 * @param params - The staking parameters.
	 * @param options - The options for the BTC delegation.
	 * @param options.inclusionProof - The inclusion proof of the staking
	 * transaction.
	 * @param options.delegationExpansionInfo - The information for the BTC
	 * delegation expansion.
	 * @returns The protobuf message.
	 */
	createBtcDelegationMsg(channel: "delegation:create" | "delegation:register" | "delegation:expand", stakingInstance: Staking, stakingInput: StakingInputs, stakingTx: Transaction, bech32Address: string, stakerBtcInfo: StakerInfo, params: StakingParams, options?: {
		inclusionProof?: btcstaking.InclusionProof;
		delegationExpansionInfo?: {
			previousStakingTx: Transaction;
			fundingTx: Transaction;
		};
	}): Promise<{
		typeUrl: string;
		value: btcstakingtx.MsgCreateBTCDelegation | btcstakingtx.MsgBtcStakeExpand;
	}>;
	/**
	 * Gets the inclusion proof for the staking transaction.
	 * See the type `InclusionProof` for more information
	 * @param inclusionProof - The inclusion proof.
	 * @returns The inclusion proof.
	 */
	private getInclusionProof;
}
/**
 * Get the staker signature from the unbonding transaction
 * This is used mostly for unbonding transactions from phase-1(Observable)
 * @param unbondingTx - The unbonding transaction
 * @returns The staker signature
 */
export declare const getUnbondingTxStakerSignature: (unbondingTx: Transaction) => string;
export interface ObservableStakingScripts extends StakingScripts {
	dataEmbedScript: Buffer;
}
export declare class ObservableStakingScriptData extends StakingScriptData {
	magicBytes: Buffer;
	constructor(stakerKey: Buffer, finalityProviderKeys: Buffer[], covenantKeys: Buffer[], covenantThreshold: number, stakingTimelock: number, unbondingTimelock: number, magicBytes: Buffer);
	/**
	 * Builds a data embed script for staking in the form:
	 *    OP_RETURN || <serializedStakingData>
	 * where serializedStakingData is the concatenation of:
	 *    MagicBytes || Version || StakerPublicKey || FinalityProviderPublicKey || StakingTimeLock
	 * Note: Only a single finality provider key is supported for now in phase 1
	 * @throws {Error} If the number of finality provider keys is not equal to 1.
	 * @returns {Buffer} The compiled data embed script.
	 */
	buildDataEmbedScript(): Buffer;
	/**
	 * Builds the staking scripts.
	 * @returns {ObservableStakingScripts} The staking scripts that can be used to stake.
	 * contains the timelockScript, unbondingScript, slashingScript,
	 * unbondingTimelockScript, and dataEmbedScript.
	 * @throws {Error} If script data is invalid.
	 */
	buildScripts(): ObservableStakingScripts;
}
/**
 * ObservableStaking is a class that provides an interface to create observable
 * staking transactions for the Babylon Staking protocol.
 *
 * The class requires a network and staker information to create staking
 * transactions.
 * The staker information includes the staker's address and
 * public key(without coordinates).
 */
export declare class ObservableStaking extends Staking {
	params: ObservableVersionedStakingParams;
	constructor(network: networks.Network, stakerInfo: StakerInfo, params: ObservableVersionedStakingParams, finalityProviderPksNoCoordHex: string[], stakingTimelock: number);
	/**
	 * Build the staking scripts for observable staking.
	 * This method overwrites the base method to include the OP_RETURN tag based
	 * on the tag provided in the parameters.
	 *
	 * @returns {ObservableStakingScripts} - The staking scripts for observable staking.
	 * @throws {StakingError} - If the scripts cannot be built.
	 */
	buildScripts(): ObservableStakingScripts;
	/**
	 * Create a staking transaction for observable staking.
	 * This overwrites the method from the Staking class with the addtion
	 * of the
	 * 1. OP_RETURN tag in the staking scripts
	 * 2. lockHeight parameter
	 *
	 * @param {number} stakingAmountSat - The amount to stake in satoshis.
	 * @param {UTXO[]} inputUTXOs - The UTXOs to use as inputs for the staking
	 * transaction.
	 * @param {number} feeRate - The fee rate for the transaction in satoshis per byte.
	 * @returns {TransactionResult} - An object containing the unsigned transaction,
	 * and fee
	 */
	createStakingTransaction(stakingAmountSat: number, inputUTXOs: UTXO[], feeRate: number): TransactionResult;
	/**
	 * Create a staking psbt for observable staking.
	 *
	 * @param {Transaction} stakingTx - The staking transaction.
	 * @param {UTXO[]} inputUTXOs - The UTXOs to use as inputs for the staking
	 * transaction.
	 * @returns {Psbt} - The psbt.
	 */
	toStakingPsbt(stakingTx: Transaction, inputUTXOs: UTXO[]): Psbt;
}
export interface CovenantSignature {
	btcPkHex: string;
	sigHex: string;
}
/**
 * Constructs an unsigned BTC Staking transaction in psbt format.
 *
 * Outputs:
 * - psbt:
 *   - The first output corresponds to the staking script with the specified amount.
 *   - The second output corresponds to the change from spending the amount and the transaction fee.
 *   - If a data embed script is provided, it will be added as the second output, and the fee will be the third output.
 * - fee: The total fee amount for the transaction.
 *
 * Inputs:
 * - scripts:
 *   - timelockScript, unbondingScript, slashingScript: Scripts for different transaction types.
 *   - dataEmbedScript: Optional data embed script.
 * - amount: Amount to stake.
 * - changeAddress: Address to send the change to.
 * - inputUTXOs: All available UTXOs from the wallet.
 * - network: Bitcoin network.
 * - feeRate: Fee rate in satoshis per byte.
 * - publicKeyNoCoord: Public key if the wallet is in taproot mode.
 * - lockHeight: Optional block height locktime to set for the transaction (i.e., not mined until the block height).
 *
 * @param {Object} scripts - Scripts used to construct the taproot output.
 * such as timelockScript, unbondingScript, slashingScript, and dataEmbedScript.
 * @param {number} amount - The amount to stake.
 * @param {string} changeAddress - The address to send the change to.
 * @param {UTXO[]} inputUTXOs - All available UTXOs from the wallet.
 * @param {networks.Network} network - The Bitcoin network.
 * @param {number} feeRate - The fee rate in satoshis per byte.
 * @param {number} [lockHeight] - The optional block height locktime.
 * @returns {TransactionResult} - An object containing the unsigned transaction and fee
 * @throws Will throw an error if the amount or fee rate is less than or equal
 * to 0, if the change address is invalid, or if the public key is invalid.
 */
export declare function stakingTransaction(scripts: {
	timelockScript: Buffer;
	unbondingScript: Buffer;
	slashingScript: Buffer;
	dataEmbedScript?: Buffer;
}, amount: number, changeAddress: string, inputUTXOs: UTXO[], network: networks.Network, feeRate: number, lockHeight?: number): TransactionResult;
/**
 * Expand an existing staking transaction with additional finality providers
 * or renew timelock.
 *
 * This function builds a Bitcoin transaction that:
 * 1. Spends the previous staking transaction output as the first input
 * 2. Uses a funding UTXO as the second input to cover transaction fees
 * 3. Creates new staking outputs where the timelock is renewed or FPs added
 * 4. Returns any remaining funds as change
 *
 * @param network - Bitcoin network (mainnet, testnet, etc.)
 * @param scripts - Scripts for the new staking outputs
 * @param amount - Total staking amount (must equal previous staking amount,
 * we only support equal amounts for now)
 * @param changeAddress - Bitcoin address to receive change from funding UTXO
 * @param feeRate - Fee rate in satoshis per byte
 * @param inputUTXOs - Available UTXOs to use for funding the expansion
 * @param previousStakingTxInfo - Details of the previous staking transaction
 * being expanded
 * @returns {TransactionResult & { fundingUTXO: UTXO }} containing the built
 * transaction and calculated fee, and the funding UTXO
 */
export declare function stakingExpansionTransaction(network: networks.Network, scripts: {
	timelockScript: Buffer;
	unbondingScript: Buffer;
	slashingScript: Buffer;
}, amount: number, changeAddress: string, feeRate: number, inputUTXOs: UTXO[], previousStakingTxInfo: {
	stakingTx: Transaction;
	scripts: {
		timelockScript: Buffer;
		unbondingScript: Buffer;
		slashingScript: Buffer;
	};
}): TransactionResult & {
	fundingUTXO: UTXO;
};
/**
 * Constructs a withdrawal transaction for manually unbonded delegation.
 *
 * This transaction spends the unbonded output from the staking transaction.
 *
 * Inputs:
 * - scripts: Scripts used to construct the taproot output.
 *   - unbondingTimelockScript: Script for the unbonding timelock condition.
 *   - slashingScript: Script for the slashing condition.
 * - unbondingTx: The unbonding transaction.
 * - withdrawalAddress: The address to send the withdrawn funds to.
 * - network: The Bitcoin network.
 * - feeRate: The fee rate for the transaction in satoshis per byte.
 *
 * Returns:
 * - psbt: The partially signed transaction (PSBT).
 *
 * @param {Object} scripts - The scripts used in the transaction.
 * @param {Transaction} unbondingTx - The unbonding transaction.
 * @param {string} withdrawalAddress - The address to send the withdrawn funds to.
 * @param {networks.Network} network - The Bitcoin network.
 * @param {number} feeRate - The fee rate for the transaction in satoshis per byte.
 * @returns {PsbtResult} An object containing the partially signed transaction (PSBT).
 */
export declare function withdrawEarlyUnbondedTransaction(scripts: {
	unbondingTimelockScript: Buffer;
	slashingScript: Buffer;
}, unbondingTx: Transaction, withdrawalAddress: string, network: networks.Network, feeRate: number): PsbtResult;
/**
 * Constructs a withdrawal transaction for naturally unbonded delegation.
 *
 * This transaction spends the unbonded output from the staking transaction when the timelock has expired.
 *
 * Inputs:
 * - scripts: Scripts used to construct the taproot output.
 *   - timelockScript: Script for the timelock condition.
 *   - slashingScript: Script for the slashing condition.
 *   - unbondingScript: Script for the unbonding condition.
 * - tx: The original staking transaction.
 * - withdrawalAddress: The address to send the withdrawn funds to.
 * - network: The Bitcoin network.
 * - feeRate: The fee rate for the transaction in satoshis per byte.
 * - outputIndex: The index of the output to be spent in the original transaction (default is 0).
 *
 * Returns:
 * - psbt: The partially signed transaction (PSBT).
 *
 * @param {Object} scripts - The scripts used in the transaction.
 * @param {Transaction} tx - The original staking transaction.
 * @param {string} withdrawalAddress - The address to send the withdrawn funds to.
 * @param {networks.Network} network - The Bitcoin network.
 * @param {number} feeRate - The fee rate for the transaction in satoshis per byte.
 * @param {number} [outputIndex=0] - The index of the output to be spent in the original transaction.
 * @returns {PsbtResult} An object containing the partially signed transaction (PSBT).
 */
export declare function withdrawTimelockUnbondedTransaction(scripts: {
	timelockScript: Buffer;
	slashingScript: Buffer;
	unbondingScript: Buffer;
}, tx: Transaction, withdrawalAddress: string, network: networks.Network, feeRate: number, outputIndex?: number): PsbtResult;
/**
 * Constructs a withdrawal transaction for a slashing transaction.
 *
 * This transaction spends the output from the slashing transaction.
 *
 * @param {Object} scripts - The unbondingTimelockScript
 * We use the unbonding timelock script as the timelock of the slashing transaction.
 * This is due to slashing tx timelock is the same as the unbonding timelock.
 * @param {Transaction} slashingTx - The slashing transaction.
 * @param {string} withdrawalAddress - The address to send the withdrawn funds to.
 * @param {networks.Network} network - The Bitcoin network.
 * @param {number} feeRate - The fee rate for the transaction in satoshis per byte.
 * @param {number} outputIndex - The index of the output to be spent in the original transaction.
 * @returns {PsbtResult} An object containing the partially signed transaction (PSBT).
 */
export declare function withdrawSlashingTransaction(scripts: {
	unbondingTimelockScript: Buffer;
}, slashingTx: Transaction, withdrawalAddress: string, network: networks.Network, feeRate: number, outputIndex: number): PsbtResult;
/**
 * Constructs a slashing transaction for a staking output without prior unbonding.
 *
 * This transaction spends the staking output of the staking transaction and distributes the funds
 * according to the specified slashing rate.
 *
 * Outputs:
 * - The first output sends `input * slashing_rate` funds to the slashing address.
 * - The second output sends `input * (1 - slashing_rate) - fee` funds back to the user's address.
 *
 * Inputs:
 * - scripts: Scripts used to construct the taproot output.
 *   - slashingScript: Script for the slashing condition.
 *   - timelockScript: Script for the timelock condition.
 *   - unbondingScript: Script for the unbonding condition.
 *   - unbondingTimelockScript: Script for the unbonding timelock condition.
 * - transaction: The original staking transaction.
 * - slashingAddress: The address to send the slashed funds to.
 * - slashingRate: The rate at which the funds are slashed (0 < slashingRate < 1).
 * - minimumFee: The minimum fee for the transaction in satoshis.
 * - network: The Bitcoin network.
 * - outputIndex: The index of the output to be spent in the original transaction (default is 0).
 *
 * @param {Object} scripts - The scripts used in the transaction.
 * @param {Transaction} stakingTransaction - The original staking transaction.
 * @param {string} slashingPkScriptHex - The public key script to send the slashed funds to.
 * @param {number} slashingRate - The rate at which the funds are slashed.
 * @param {number} minimumFee - The minimum fee for the transaction in satoshis.
 * @param {networks.Network} network - The Bitcoin network.
 * @param {number} [outputIndex=0] - The index of the output to be spent in the original transaction.
 * @returns {{ psbt: Psbt }} An object containing the partially signed transaction (PSBT).
 */
export declare function slashTimelockUnbondedTransaction(scripts: {
	slashingScript: Buffer;
	timelockScript: Buffer;
	unbondingScript: Buffer;
	unbondingTimelockScript: Buffer;
}, stakingTransaction: Transaction, slashingPkScriptHex: string, slashingRate: number, minimumFee: number, network: networks.Network, outputIndex?: number): {
	psbt: Psbt;
};
/**
 * Constructs a slashing transaction for an early unbonded transaction.
 *
 * This transaction spends the staking output of the staking transaction and distributes the funds
 * according to the specified slashing rate.
 *
 * Transaction outputs:
 * - The first output sends `input * slashing_rate` funds to the slashing address.
 * - The second output sends `input * (1 - slashing_rate) - fee` funds back to the user's address.
 *
 * @param {Object} scripts - The scripts used in the transaction. e.g slashingScript, unbondingTimelockScript
 * @param {Transaction} unbondingTx - The unbonding transaction.
 * @param {string} slashingPkScriptHex - The public key script to send the slashed funds to.
 * @param {number} slashingRate - The rate at which the funds are slashed.
 * @param {number} minimumSlashingFee - The minimum fee for the transaction in satoshis.
 * @param {networks.Network} network - The Bitcoin network.
 * @returns {{ psbt: Psbt }} An object containing the partially signed transaction (PSBT).
 */
export declare function slashEarlyUnbondedTransaction(scripts: {
	slashingScript: Buffer;
	unbondingTimelockScript: Buffer;
}, unbondingTx: Transaction, slashingPkScriptHex: string, slashingRate: number, minimumSlashingFee: number, network: networks.Network): {
	psbt: Psbt;
};
export declare function unbondingTransaction(scripts: {
	unbondingTimelockScript: Buffer;
	slashingScript: Buffer;
}, stakingTx: Transaction, unbondingFee: number, network: networks.Network, outputIndex?: number): TransactionResult;
export declare const createCovenantWitness: (originalWitness: Buffer[], paramsCovenants: Buffer[], covenantSigs: CovenantSignature[], covenantQuorum: number) => Buffer<ArrayBufferLike>[];
export declare const initBTCCurve: () => void;
/**
 * Check whether the given address is a valid Bitcoin address.
 *
 * @param {string} btcAddress - The Bitcoin address to check.
 * @param {object} network - The Bitcoin network (e.g., bitcoin.networks.bitcoin).
 * @returns {boolean} - True if the address is valid, otherwise false.
 */
export declare const isValidBitcoinAddress: (btcAddress: string, network: networks.Network) => boolean;
/**
 * Check whether the given address is a Taproot address.
 *
 * @param {string} taprootAddress - The Bitcoin bech32 encoded address to check.
 * @param {object} network - The Bitcoin network (e.g., bitcoin.networks.bitcoin).
 * @returns {boolean} - True if the address is a Taproot address, otherwise false.
 */
export declare const isTaproot: (taprootAddress: string, network: networks.Network) => boolean;
/**
 * Check whether the given address is a Native SegWit address.
 *
 * @param {string} segwitAddress - The Bitcoin bech32 encoded address to check.
 * @param {object} network - The Bitcoin network (e.g., bitcoin.networks.bitcoin).
 * @returns {boolean} - True if the address is a Native SegWit address, otherwise false.
 */
export declare const isNativeSegwit: (segwitAddress: string, network: networks.Network) => boolean;
/**
 * Check whether the given public key is a valid public key without a coordinate.
 *
 * @param {string} pkWithNoCoord - public key without the coordinate.
 * @returns {boolean} - True if the public key without the coordinate is valid, otherwise false.
 */
export declare const isValidNoCoordPublicKey: (pkWithNoCoord: string) => boolean;
/**
 * Get the public key without the coordinate.
 *
 * @param {string} pkHex - The public key in hex, with or without the coordinate.
 * @returns {string} - The public key without the coordinate in hex.
 * @throws {Error} - If the public key is invalid.
 */
export declare const getPublicKeyNoCoord: (pkHex: string) => string;
/**
 * Convert a transaction id to a hash. in buffer format.
 *
 * @param {string} txId - The transaction id.
 * @returns {Buffer} - The transaction hash.
 */
export declare const transactionIdToHash: (txId: string) => Buffer;
export declare const getBabylonParamByBtcHeight: (height: number, babylonParamsVersions: VersionedStakingParams[]) => StakingParams;
export declare const getBabylonParamByVersion: (version: number, babylonParams: VersionedStakingParams[]) => StakingParams;
export declare const findInputUTXO: (inputUTXOs: UTXO[], input: Input) => UTXO;
/**
 * Determines and constructs the correct PSBT input fields for a given UTXO based on its script type.
 * This function handles different Bitcoin script types (P2PKH, P2SH, P2WPKH, P2WSH, P2TR) and returns
 * the appropriate PSBT input fields required for that UTXO.
 *
 * @param {UTXO} utxo - The unspent transaction output to process