@arcblock/graphql-client

Client library to connect your app with forge powered blockchain node, all requests are sent over http/https, can be used in both Node.js and browser environment.

A GraphQLClient instance mainly supports 5 groups of methods that saves you time when read/write data from/to blockchain.

• queries: query block/transaction/account/asset/chain/node data form the blockchain
• mutations: send transaction to the blockchain, sendTx, all transactions should be signed before sending out to the blockchain
• subscriptions: listen to changes of any data on the blockchain
• senders: shortcut methods that takes a wallet and a tx object, then do the signing, and sending
• encoders: shortcut methods that takes a wallet and a tx object, encode the transaction for later signing, used internally by senders

Table of Contents

• Install
• Usage
• Examples
• Debugging
• Documentation

Install

npm i @arcblock/graphql-client -S
# OR
yarn add @arcblock/graphql-client

Usage

const Mcrypto = require('@arcblock/mcrypto');
const GraphQLClient = require('@arcblock/graphql-client');
const { fromRandom, WalletType } = require('@arcblock/forge-wallet');
const { hexToBytes } = require('@arcblock/forge-util');

const client = new GraphQLClient('http://localhost:8210/api');
console.log({
  queries: client.getQueries(),
  subscriptions: client.getSubscriptions(),
  mutations: client.getMutations(),
  senders: client.getTxSendMethods(),
  encoders: client.getTxEncodeMethods(),
});

(async () => {
  // Query chain state data
  const chainInfo = await client.getChainInfo();
  const forgeState = await client.getForgeState();
  const block = await client.getBlock({ height: 2 });
  console.log('getChainInfo', chainInfo);
  console.log('getForgeState', forgeState);
  console.log('getBlock', block);

  // Send transaction
  const wallet = fromRandom(
    WalletType({
      role: Mcrypto.types.RoleType.ROLE_ACCOUNT,
      pk: Mcrypto.types.KeyType.SECP256K1,
      hash: Mcrypto.types.HashType.SHA3,
    })
  );
  const hash = await client.declare({
    moniker: 'username',
    wallet,
  });
  console.log(hash);
})();

Examples

• Declare identify on the blockchain
• Get free token for newly created account
• Transfer assets between 2 accounts
• Transfer tokens between 2 accounts
• Exchange asset and token between 2 newly created accounts
• Create/update asset on the blockchain
• Consume newly create asset
• Stake for the connected node

Debugging

• If you are in Node.js: DEBUG=@arcblock/graphql-client node script.js
• If you are in browser: localStorage.setItem('DEBUG', '@arcblock/graphql-client')

Documentation

• Query arguments and response structure can be found here: QUERIES.md
• Complete method list can be found here: README.md