Checks tutorials: 1st draft done

content/code_samples/checks/js/submitCancel.js

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+'use strict'
+const RippleAPI = require('ripple-lib').RippleAPI
+
+// This example connects to a public Test Net server
+const api = new RippleAPI({server: 'wss://s.altnet.rippletest.net:51233'})
+api.connect().then(() => {
+  console.log('Connected')
+
+  const tx_blob = "12001222800000002400000007201B007A251450182E0AD0740B79BE0AAE5EDD1D5FC79E3C5C221D23C6A7F771D85569B5B91195C268400000000000000C732103B6FCD7FAC4F665FE92415DD6E8450AD90F7D6B3D45A6CFCF2E359045FF4BB4007446304402205D77451B0D7BCDA1FE5B98763C5B3B2837453371FE93C2B86157C44B1867AE36022003800273848BC2F8E1C6EC7EE4B0CB2425A888AE80E586886C306C796B25678B8114735FF88E5269C80CD7F7AF10530DAB840BBF6FDF"
+
+  return api.submit(tx_blob)
+}).then(response => {
+  console.log("Preliminary transaction result:", response.resultCode)
+
+// Disconnect and return
+}).then(() => {
+  api.disconnect().then(() => {
+    console.log('Disconnected')
+    process.exit()
+  })
+}).catch(console.error)