@hashgraphonline/hedera-agent-kit/dist/esm/index4.js

Build LLM-powered applications that interact with the Hedera Network. Create conversational agents that can understand user requests in natural language and execute Hedera transactions, or build backend systems that leverage AI for on-chain operations.

import { HederaMirrorNode, Logger } from "@hashgraphonline/standards-sdk";
class AbstractSigner {
  /**
   * Retrieves the public key associated with this signer's account using the Hedera Mirror Node.
   * This method relies on the `mirrorNode` property being initialized by the concrete signer.
   * @returns {Promise<PublicKey>} A promise that resolves to the Hedera PublicKey object.
   * @throws {Error} If the public key cannot be retrieved from the mirror node or if mirrorNode is not initialized.
   */
  async getPublicKey() {
    if (!this.mirrorNode) {
      throw new Error(
        "AbstractSigner: HederaMirrorNode has not been initialized by the concrete signer implementation. This is an internal error."
      );
    }
    const accountIdToQuery = this.getAccountId();
    try {
      return await this.mirrorNode.getPublicKey(accountIdToQuery.toString());
    } catch (error) {
      const errorMessage = error instanceof Error ? error.message : String(error);
      throw new Error(
        `Failed to retrieve public key from mirror node for account ${accountIdToQuery.toString()}: ${errorMessage}`
      );
    }
  }
  /**
   * Initializes the HederaMirrorNode instance for the signer.
   * Concrete classes must call this in their constructor.
   * @param {HederaNetworkType} network - The network for the mirror node.
   * @param {string} moduleName - A descriptive name for the logger module (e.g., 'ServerSigner', 'BrowserSigner').
   */
  initializeMirrorNode(network, moduleName) {
    this.mirrorNode = new HederaMirrorNode(
      network,
      new Logger({
        level: "info",
        module: `${moduleName}-MirrorNode`
      })
    );
  }
}
export {
  AbstractSigner
};
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