mirror of
https://github.com/XRPLF/xrpl-dev-portal.git
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106 lines
3.4 KiB
JavaScript
106 lines
3.4 KiB
JavaScript
// Dependencies for Node.js.
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// In browsers, use <script> tags as in the example demo.html.
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if (typeof module !== "undefined") {
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// gotta use var here because const/let are block-scoped to the if statement.
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var xrpl = require('xrpl')
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}
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async function main() {
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// Connect -------------------------------------------------------------------
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const client = new xrpl.Client('wss://s.altnet.rippletest.net:51233')
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await client.connect()
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client.on('error', (errorCode, errorMessage) => {
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console.log(errorCode + ': ' + errorMessage)
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})
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// Get credentials from the Testnet Faucet ------------------------------------
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console.log("Requesting an address from the Testnet faucet...")
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const { wallet, balance } = await client.fundWallet()
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// Look up current state of a trust line --------------------------------------
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const issuing_address = wallet.address
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const address_to_freeze = 'rUpy3eEg8rqjqfUoLeBnZkscbKbFsKXC3v'
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const currency_to_freeze = 'USD'
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const account_lines = {
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command: 'account_lines',
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account: issuing_address,
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peer: address_to_freeze,
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}
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console.log('Looking up', currency_to_freeze, 'trust line from',
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issuing_address, 'to', address_to_freeze)
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const data = await client.request(account_lines)
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const trustlines = data.result.lines
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// Find the trust line for our currency_to_freeze ------------------------------
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let trustline = null
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for (let i = 0; i < trustlines.length; i++) {
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if(trustlines[i].currency === currency_to_freeze) {
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trustline = trustlines[i]
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break
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}
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}
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// Prepare a TrustSet transaction to create or modify the target trust line ----
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let trust_set = null
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if(trustline === null) {
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console.log('Trustline not found, making a default one')
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trust_set = {
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TransactionType: 'TrustSet',
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Account: issuing_address,
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LimitAmount: {
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value: '0',
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currency: currency_to_freeze,
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issuer: address_to_freeze,
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},
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}
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} else {
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console.log('Found existing trustline: ', trustline)
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trust_set = {
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TransactionType: 'TrustSet',
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Account: issuing_address,
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LimitAmount: {
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value: trustline.limit,
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currency: trustline.currency,
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issuer: trustline.account
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},
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}
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}
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// Set a flag to freeze the trust line --------------------------------------------
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trust_set.Flags = xrpl.TrustSetFlags.tfSetFreeze
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// Submit a TrustSet transaction to set an individual freeze ----------------------
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console.log('Submitting TrustSet tx:', trust_set)
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const result = await client.submitAndWait(wallet, trust_set)
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console.log("Submitted TrustSet!")
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// Investigate --------------------------------------------------------------------
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console.log(
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`You would investigate whatever prompted you to freeze the trust line now...`)
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await new Promise(resolve => setTimeout(resolve, 5000))
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// Clear the individual freeze ----------------------------------------------------
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// We're reusing our TrustSet transaction from earlier with a different flag
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trust_set.Flags = xrpl.TrustSetFlags.tfClearFreeze
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// Submit a TrustSet transaction to clear an individual freeze --------------------
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console.log('Submitting TrustSet tx:', trust_set)
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const result2 = await client.submitAndWait(wallet, trust_set)
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console.log("Submitted TrustSet!")
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console.log("Finished submitting. Now disconnecting.")
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await client.disconnect()
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// End main()
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}
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main().catch(console.error)
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