play with dex

Play with the dex

• issue the token

  await api.tx.tokenModule.issue(symbol, amount).signAndSend(account);

  You can also subscribe result and confirm status is finalized:

  api.tx.tokenModule.issue(symbol, amount).signAndSend(account, (result) => {
      if (result.status.isFinalized) {
          const record = result.findRecord("tokenModule", "Issued");
          const event = record.toJSON().event.data;
          console.log(event); // Issued(AccountId, Hash, Balance)
      }
  });

• transfer the token

  await api.tx.tokenModule.transfer(tokenHash, toAccountId, amount).signAndSend(account);

  You can also subscribe result and confirm status is finalized:

  api.tx.tokenModule.transfer(tokenHash, toAccountId, amount).signAndSend(account, (result) => {
      if (result.status.isFinalized) {
          const record = result.findRecord("tokenModule", "Transferd");
          const event = record.toJSON().event.data;
          console.log(event); // Transferd(AccountId, AccountId, Hash, Balance)
      }
  });

• create the trade pair

  await api.tx.tradeModule.createTradePair(baseTokenHash, quoteTokenHash).signAndSend(account);

  You can also subscribe result and confirm status is finalized:

  api.tx.tradeModule.createTradePair(baseTokenHash, quoteTokenHash).signAndSend(account, (result) => {
      if (result.status.isFinalized) {
          const record = result.findRecord("tokenModule", "TradePairCreated");
          const event = record.toJSON().event.data;
          console.log(event); // TradePairCreated(AccountId, Hash, TradePair)
      }
  });

• create the limit order

  await api.tx.tradeModule.createLimitOrder(baseTokenHash, quoteTokenHash, type, price * 10 ** 8, amount).signAndSend(account); // type: [buy: 0, sell: 1], if order is buy, amount = price * want_to_buy_amount

  You can also subscribe result and confirm status is finalized:

  api.tx.tradeModule.createLimitOrder(baseTokenHash, quoteTokenHash, type, price * 10 ** 8, amount).signAndSend(account, (result) => {
      if (result.status.isFinalized) {
          const record = result.findRecord("tokenModule", "OrderCreated"); // OrderCreated (accountId, baseTokenHash, quoteTokenHash, orderHash, LimitOrder)
          const record2 = result.findRecord("tradeModule", "TradeCreated"); // TradeCreated (accountId, baseTokenHash, quoteTokenHash, tradeHash, Trade)
  
          const event = record.toJSON().event.data;
          console.log(event);
          const event2 = record.toJSON().event.data; // if matched will received tradeCreated event
      }
  });

• cancel the limit order

  await api.tx.tradeModule.cancelLimitOrder(orderHash).signAndSend(account);

  You can also subscribe result and confirm status is finalized:

  api.tx.tradeModule.cancelLimitOrder(orderHash).signAndSend(account, (result) => {
      if (result.status.isFinalized) {
          const record = result.findRecord("tokenModule", "OrderCanceled");
          const event = record.toJSON().event.data;
          console.log(event); // OrderCanceled(accountId, orderHash)
      }
  });

Tips: If you want to use it to connect your node with some other runtime modules. You need append additional types In config.js/types and replace endPoint url. This is nessusary if the runtime modules uses types not available in the base Substrate runtime.

Of course you can play with it by polkadotjs wallet frontend with:

git clone https://github.com/polkadot-js/apps
cd apps
yarn
yarn start

Then open the link http://localhost:3000/#/?rpc=ws://127.0.0.1:9944