Function checkIsValidKey

js/sign/src/utils/utils.ts:110–123

(
  expectedKeyType: crypto.KeyObjectType,
  key: KeyObject
)

// Throws an error if the key is not a valid Ed25519 or ECDSA P-256 key of the specified type.
export function checkIsValidKey(
  expectedKeyType: crypto.KeyObjectType,
  key: KeyObject
) {
  if (key.type !== expectedKeyType) {
    throw new Error(
      `Expected key type to be ${expectedKeyType}, but it was "${key.type}".`
    );
  }

  if (!isAsymmetricKeyTypeSupported(key)) {
    throw new Error(`Expected either "Ed25519" or "ECDSA P-256" key.`);
  }
}

export function verifySignature(
  data: Uint8Array,