/// <reference types="node" />
export interface ECDSASignature {
v: bigint;
r: Buffer;
s: Buffer;
}
/**
* Returns the ECDSA signature of a message hash.
*
* If `chainId` is provided assume an EIP-155-style signature and calculate the `v` value
* accordingly, otherwise return a "static" `v` just derived from the `recovery` bit
*/
export declare function ecsign(msgHash: Buffer, privateKey: Buffer, chainId?: bigint): ECDSASignature;
/**
* ECDSA public key recovery from signature.
* NOTE: Accepts `v === 0 | v === 1` for EIP1559 transactions
* @returns Recovered public key
*/
export declare const ecrecover: (msgHash: Buffer, v: bigint, r: Buffer, s: Buffer, chainId?: bigint) => Buffer;
/**
* Convert signature parameters into the format of `eth_sign` RPC method.
* NOTE: Accepts `v === 0 | v === 1` for EIP1559 transactions
* @returns Signature
*/
export declare const toRpcSig: (v: bigint, r: Buffer, s: Buffer, chainId?: bigint) => string;
/**
* Convert signature parameters into the format of Compact Signature Representation (EIP-2098).
* NOTE: Accepts `v === 0 | v === 1` for EIP1559 transactions
* @returns Signature
*/
export declare const toCompactSig: (v: bigint, r: Buffer, s: Buffer, chainId?: bigint) => string;
/**
* Convert signature format of the `eth_sign` RPC method to signature parameters
*
* NOTE: For an extracted `v` value < 27 (see Geth bug https://github.com/ethereum/go-ethereum/issues/2053)
* `v + 27` is returned for the `v` value
* NOTE: After EIP1559, `v` could be `0` or `1` but this function assumes
* it's a signed message (EIP-191 or EIP-712) adding `27` at the end. Remove if needed.
*/
export declare const fromRpcSig: (sig: string) => ECDSASignature;
/**
* Validate a ECDSA signature.
* NOTE: Accepts `v === 0 | v === 1` for EIP1559 transactions
* @param homesteadOrLater Indicates whether this is being used on either the homestead hardfork or a later one
*/
export declare const isValidSignature: (v: bigint, r: Buffer, s: Buffer, homesteadOrLater?: boolean, chainId?: bigint) => boolean;
/**
* Returns the keccak-256 hash of `message`, prefixed with the header used by the `eth_sign` RPC call.
* The output of this function can be fed into `ecsign` to produce the same signature as the `eth_sign`
* call for a given `message`, or fed to `ecrecover` along with a signature to recover the public key
* used to produce the signature.
*/
export declare const hashPersonalMessage: (message: Buffer) => Buffer;
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