/// <reference types="node" />
import { Buffer } from 'buffer';
import { PublicKey } from '../publickey.js';
import { TransactionInstruction } from '../transaction/index.js';
/**
 * Params for creating an secp256k1 instruction using a public key
 */
export declare type CreateSecp256k1InstructionWithPublicKeyParams = {
    publicKey: Buffer | Uint8Array | Array<number>;
    message: Buffer | Uint8Array | Array<number>;
    signature: Buffer | Uint8Array | Array<number>;
    recoveryId: number;
    instructionIndex?: number;
};
/**
 * Params for creating an secp256k1 instruction using an Ethereum address
 */
export declare type CreateSecp256k1InstructionWithEthAddressParams = {
    ethAddress: Buffer | Uint8Array | Array<number> | string;
    message: Buffer | Uint8Array | Array<number>;
    signature: Buffer | Uint8Array | Array<number>;
    recoveryId: number;
    instructionIndex?: number;
};
/**
 * Params for creating an secp256k1 instruction using a private key
 */
export declare type CreateSecp256k1InstructionWithPrivateKeyParams = {
    privateKey: Buffer | Uint8Array | Array<number>;
    message: Buffer | Uint8Array | Array<number>;
    instructionIndex?: number;
};
export declare class Secp256k1Program {
    /**
     * Public key that identifies the secp256k1 program
     */
    static programId: PublicKey;
    /**
     * Construct an Ethereum address from a secp256k1 public key buffer.
     * @param {Buffer} publicKey a 64 byte secp256k1 public key buffer
     */
    static publicKeyToEthAddress(publicKey: Buffer | Uint8Array | Array<number>): Buffer;
    /**
     * Create an secp256k1 instruction with a public key. The public key
     * must be a buffer that is 64 bytes long.
     */
    static createInstructionWithPublicKey(params: CreateSecp256k1InstructionWithPublicKeyParams): TransactionInstruction;
    /**
     * Create an secp256k1 instruction with an Ethereum address. The address
     * must be a hex string or a buffer that is 20 bytes long.
     */
    static createInstructionWithEthAddress(params: CreateSecp256k1InstructionWithEthAddressParams): TransactionInstruction;
    /**
     * Create an secp256k1 instruction with a private key. The private key
     * must be a buffer that is 32 bytes long.
     */
    static createInstructionWithPrivateKey(params: CreateSecp256k1InstructionWithPrivateKeyParams): TransactionInstruction;
}