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Signer abstraction ​

HieroKit can work with external signers, multi‑sig and scheduled transaction signers via the HieroSigner type.

HieroSigner ​

ts
import type { HieroSigner } from "hierokit";

HieroSigner is an alias for the SDK's Signer type. It can represent:

  • browser wallet signers
  • hardware signers
  • server‑side HSM signers
  • composite/multi‑sig signers

You can pass one or more signers into the HieroConfig when constructing the client:

ts
const config: HieroConfig = {
  network: "testnet",
  signers: [externalSigner],
};

const client = new Client(config);

If an operator.privateKey is also provided, the client will still set the SDK operator; otherwise it operates in "external signer only" mode.

createCompositeSigner(signers) ​

ts
import { createCompositeSigner } from "hierokit";

const multiSigSigner = createCompositeSigner([signerA, signerB, signerC]);

Creates a new HieroSigner that:

  • delegates network/ledger information to the first signer
  • applies populateTransaction, checkTransaction and signTransaction across all underlying signers

This is suitable for multi‑sig scenarios and for scheduled transaction signing where multiple parties need to sign the same transaction.