import { PublicKey, Signer } from "@mysten/sui/cryptography";
import { KeyManagementServiceClient } from "@google-cloud/kms";

//#region src/gcp/gcp-kms-client.d.ts

/**
 * Configuration options for initializing the GcpKmsSigner.
 */
interface GcpKmsSignerOptions {
  /** The version name generated from `client.cryptoKeyVersionPath()` */
  versionName: string;
  /** Options for setting up the GCP KMS client */
  client: KeyManagementServiceClient;
  /** Public key */
  publicKey: PublicKey;
}
/**
 * GCP KMS Signer integrates GCP Key Management Service (KMS) with the Sui blockchain
 * to provide signing capabilities using GCP-managed cryptographic keys.
 */
declare class GcpKmsSigner extends Signer {
  #private;
  /**
   * Creates an instance of GcpKmsSigner. It's expected to call the static `fromOptions`
   * or `fromVersionName` method to create an instance.
   * For example:
   * ```
   * const signer = await GcpKmsSigner.fromVersionName(versionName);
   * ```
   * @throws Will throw an error if required GCP credentials are not provided.
   */
  constructor({
    versionName,
    client,
    publicKey
  }: GcpKmsSignerOptions);
  /**
   * Retrieves the key scheme used by this signer.
   * @returns GCP supports only `Secp256k1` and `Secp256r1` schemes.
   */
  getKeyScheme(): "ED25519" | "Secp256r1" | "Secp256k1" | "MultiSig" | "ZkLogin" | "Passkey";
  /**
   * Retrieves the public key associated with this signer.
   * @returns The Secp256k1PublicKey instance.
   * @throws Will throw an error if the public key has not been initialized.
   */
  getPublicKey(): PublicKey;
  /**
   * Signs the given data using GCP KMS.
   * @param bytes - The data to be signed as a Uint8Array.
   * @returns A promise that resolves to the signature as a Uint8Array.
   * @throws Will throw an error if the public key is not initialized or if signing fails.
   */
  sign(bytes: Uint8Array): Promise<Uint8Array<ArrayBuffer>>;
  /**
   * Creates a GCP KMS signer from the provided options.
   * Expects the credentials file to be set as an env variable
   * (GOOGLE_APPLICATION_CREDENTIALS).
   */
  static fromOptions(options: {
    projectId: string;
    location: string;
    keyRing: string;
    cryptoKey: string;
    cryptoKeyVersion: string;
  }): Promise<GcpKmsSigner>;
  static fromVersionName(versionName: string): Promise<GcpKmsSigner>;
}
//#endregion
export { GcpKmsSigner, GcpKmsSignerOptions };
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