import type { CosmosTxV1beta1SignDoc as SignDoc } from '../protobufs/index.js';
import type { StdSignDoc } from '../registry/index.js';
/**
 * Signs the given amino-encoded `stdSignDoc` with the given `privateKey` using
 * secp256k1, and returns the signature bytes. For Injective, the `type` param
 * must be set to `ethsecp256k1`.
 */
export declare function signAmino(stdSignDoc: StdSignDoc, privateKey: Uint8Array, type?: 'secp256k1' | 'ethsecp256k1'): Uint8Array;
/**
 * Signs the given proto-encoded `signDoc` with the given `privateKey` using
 * secp256k1, and returns the signature bytes. For Injective, the `type` param
 * must be set to `ethsecp256k1`.
 */
export declare function signDirect(signDoc: SignDoc, privateKey: Uint8Array, type?: 'secp256k1' | 'ethsecp256k1'): Uint8Array;
/**
 * Hashes and returns the digest of the given EIP191 `message` bytes.
 */
export declare function hashEthArbitraryMessage(message: Uint8Array): Uint8Array;
/**
 * Recovers and returns the secp256k1 public key of the signer given the arbitrary
 * `message` and `signature` that was signed using EIP191.
 */
export declare function recoverPubKeyFromEthSignature(message: Uint8Array, signature: Uint8Array): Uint8Array;
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