export type Hex = `0x${string}`;
export interface LegacyTx {
    type: 'legacy';
    chainId: number | bigint;
    nonce: number | bigint;
    gasPrice: number | bigint;
    gasLimit: number | bigint;
    to: Hex | null;
    value: number | bigint;
    data: Hex | Buffer;
}
export interface AccessListItem {
    address: Hex;
    storageKeys: Hex[];
}
export interface Eip1559Tx {
    type: 'eip1559';
    chainId: number | bigint;
    nonce: number | bigint;
    maxPriorityFeePerGas: number | bigint;
    maxFeePerGas: number | bigint;
    gasLimit: number | bigint;
    to: Hex | null;
    value: number | bigint;
    data: Hex | Buffer;
    accessList?: AccessListItem[];
}
export type SignableTx = LegacyTx | Eip1559Tx;
/**
 * Returns the 32-byte keccak digest that should be signed for the given tx.
 * For legacy this is the EIP-155 digest; for EIP-1559 it is the type-prefixed digest.
 */
export declare function txDigest(tx: SignableTx): Buffer;
/**
 * Sign a transaction and return its 0x-prefixed serialized hex.
 */
export declare function signTransaction(tx: SignableTx, privateKey: Buffer | Uint8Array): Hex;
//# sourceMappingURL=sign-tx.d.ts.map