Multi-step ownership transfer

index.ts

#!/usr/bin/env ts-node
import assert from 'assert';
import { MemoryDatastore } from 'interface-datastore';
import { ChainTree, EcdsaKey, Community, Repo, setOwnershipTransaction, Tupelo } from 'tupelo-wasm-sdk';

const getRepo = async () => {
  const repo = new Repo('test', {
    lock: 'memory',
    storageBackends: {
      root: MemoryDatastore,
      blocks: MemoryDatastore,
      keys: MemoryDatastore,
      datastore: MemoryDatastore
    }
  });
  await repo.init({});
  await repo.open();
  return repo;
};

const main = async () => {
  const repo = await getRepo();
  const community = await Community.getDefault(repo);

  // Create a key pair representing Alice
  const aliceKey = await EcdsaKey.generate();
  // Create a ChainTree representing a trading card, owned by Alice
  const tradingCard = await ChainTree.newEmptyTree(community.blockservice, aliceKey);

  // Create a key pair representing Bob
  const bobKey = await EcdsaKey.generate();
  // Get the address of Bob's key pair
  const bobAddress = await Tupelo.ecdsaPubkeyToAddress(bobKey.publicKey);

  // Create a key pair representing Bob
  const carolKey = await EcdsaKey.generate();
  // Get the address of Bob's key pair
  const carolAddress = await Tupelo.ecdsaPubkeyToAddress(carolKey.publicKey);


  console.log(
    `* Transferring ownership of trading card from Alice to Bob...`, await tradingCard.id()
  );
  // Transfer ownership of trading card to Bob
  await community.playTransactions(tradingCard, [
    setOwnershipTransaction([bobAddress]),
  ]);
  await community.nextUpdate();

  const newOwners = (await tradingCard.resolve(["tree/_tupelo/authentications"])).value;
  assert.deepEqual(newOwners, [bobAddress,]);

  console.log(`* Transfer successfully made!`);

  tradingCard.key = bobKey

  console.log(
    `* Transferring ownership of trading card from Bob to Carol...`, await tradingCard.id()
  );
  // Transfer ownership of trading card to Bob
  await community.playTransactions(tradingCard, [
    setOwnershipTransaction([carolAddress]),
  ]);
  await community.nextUpdate();

  assert.deepEqual((await tradingCard.resolve(["tree/_tupelo/authentications"])).value, [carolAddress,]);

  console.log(`* Transfer successfully made!`);


};

main()
  .then(() => {
    process.exit(0)
  })
  .catch((err) => {
    console.error(err)
    process.exit(1)
  });