How to access the public key from a Key object in Hedera?

Question

I need to set a public key for my multisignature but I'm unsure how to access the public key from a Key object in my frontend code?

I tried converting the object but couldn't get the public key?

Answer 1

I assume you are using Javascript SDK. You can derive public key from private key object. Hedera Javascript SDK allows you to generate both ECDSA and ED25519 key pairs. Please take a look at the following example

const { PrivateKey } = require("@hashgraph/sdk");

async function main() {
  const privateKeyED = PrivateKey.generateED25519();
  const publicKeyED = privateKeyED.publicKey;
  console.log("- Generated ED25519 Key");
  console.log("Private Key (ED25519, DER)", privateKeyED.toStringDer());
  console.log("Private Key (ED25519, RAW)", privateKeyED.toStringRaw());
  console.log("Public Key (ED25519, DER)", publicKeyED.toStringDer());
  console.log("Public Key (ED25519, RAW)", publicKeyED.toStringRaw());
  console.log("------------------------");
  console.log("- Generated ECDSA Key");
  const privateKeyEC = PrivateKey.generateECDSA();
  const publicKeyEC = privateKeyEC.publicKey;
  console.log("Private Key (ECDSA, DER)", privateKeyEC.toStringDer());
  console.log("Private Key (ECDSA, RAW)", privateKeyEC.toStringRaw());
  console.log("Public Key (ECDSA, DER)", publicKeyEC.toStringDer());
  console.log("Public Key (ECDSA, RAW)", publicKeyEC.toStringRaw());
  console.log("Ethereum Address", publicKeyEC.toEthereumAddress().toString());
}

main();