Getting started with web4 in pure JavaScript

commands.txt

$ cd web4
$ git checkout master && git pull && git clean -xdf && yarn install && yarn build && yarn run lerna run pack-node
$ node
> function wait(promise) { return require('deasync2').await(promise); }
> const web4 = require("./packages/iov-web4/dist/node")
> web4
{ TransactionKind: 
   { '0': 'Send',
     '1': 'SetName',
     '2': 'SwapOffer',
     '3': 'SwapCounter',
     '4': 'SwapClaim',
     '5': 'SwapTimeout',
     Send: 0,
     SetName: 1,
     SwapOffer: 2,
     SwapCounter: 3,
     SwapClaim: 4,
     SwapTimeout: 5 },
  Ed25519SimpleAddressKeyringEntry: [Function: Ed25519SimpleAddressKeyringEntry],
  Keyring: 
   { [Function: Keyring]
     deserializationRegistry: 
      Map {
        'ed25519' => [Function],
        'ed25519-simpleaddress' => [Function] } },
  UserProfile: [Function: UserProfile],
  bnsConnector: [Function],
  bnsFromOrToTag: [Function: fromOrToTag],
  Web4Write: [Function: Web4Write],
  withConnectors: [Function] }
> const { Ed25519SimpleAddressKeyringEntry, UserProfile, bnsConnector, bnsFromOrToTag, TransactionKind, Web4Write, withConnectors } = web4

> const profile = new UserProfile();
> profile.addEntry(Ed25519SimpleAddressKeyringEntry.fromMnemonic("degree tackle suggest window test behind mesh extra cover prepare oak script"))
> const faucet = wait(profile.createIdentity(0))
> const knownChains = wait(withConnectors(wait(bnsConnector("wss://bov.wolfnet.iov.one"))));
> const writer = new Web4Write(profile, knownChains);
> const chainId = writer.chainIds()[0];
> const reader = writer.reader(chainId);

> const faucetAddress = writer.keyToAddress(chainId, faucet.pubkey);
> wait(reader.getAccount({ address: faucetAddress })).data[0].balance
[ { whole: 99888,
    fractional: 999998446,
    tokenTicker: 'CASH',
    tokenName: 'Second token of this chain',
    sigFigs: 6 },
  { whole: 100000,
    fractional: 0,
    tokenTicker: 'IOV',
    tokenName: 'Main token of this chain',
    sigFigs: 6 } ]
> wait(reader.searchTx({ tags: [bnsFromOrToTag(faucetAddress)] }));
[ { height: 135,
    transaction: 
     { kind: 'send',
       recipient: [Object],
       amount: [Object],
       memo: 'My first payment',
       chainId: 'test-chain-Cc61nX',
       signer: [Object] },
    primarySignature: { nonce: [Object], publicKey: [Object], signature: [Object] },
    otherSignatures: [] },
  { height: 153,
    transaction: 
     { kind: 'send',
       recipient: [Object],
       amount: [Object],
       memo: 'Web4 write style',
       chainId: 'test-chain-Cc61nX',
       signer: [Object] },
    primarySignature: { nonce: [Object], publicKey: [Object], signature: [Object] },
    otherSignatures: [] } ]

... and so on