feat: add credit transfer tutorial

.env.example

@@ -5,4 +5,6 @@ IDENTITY_ID='6cSbshXPYDA2CmBtD31X4uo7YLwtef4mVDt15zRok8Xg'
 # CONTRACT_ID comes from the "$id" found in the "contract-register-minimal.js" response
 CONTRACT_ID='4BRJbxsDTFY4GJGrCqM6KUjv1wSQDBuUYiGkuzgcrD5d'
 # NETWORK sets which network to connect to: testnet, devnet, or local
-NETWORK='testnet'
+NETWORK='testnet'
+# RECIPIENT_ID sets an identity ID to receive a credit transfer
+RECIPIENT_ID='6cSbshXPYDA2CmBtD31X4uo7YLwtef4mVDt15zRok8Xg'

1-Identities-and-Names/identity-transfer-credits.js

@@ -0,0 +1,37 @@
+// See https://docs.dash.org/projects/platform/en/stable/docs/tutorials/identities-and-names/transfer-credits-to-an-identity.html
+const Dash = require('dash');
+const dotenv = require('dotenv');
+dotenv.config();
+
+const clientOpts = {
+  network: process.env.NETWORK,
+  wallet: {
+    mnemonic: process.env.MNEMONIC, // A Dash wallet mnemonic with testnet funds
+    unsafeOptions: {
+      skipSynchronizationBeforeHeight: process.env.SYNC_START_HEIGHT, // only sync from early-2022
+    },
+  },
+};
+const client = new Dash.Client(clientOpts);
+
+const transferCredits = async () => {
+  const identityId = process.env.IDENTITY_ID; // Your identity ID
+  const identity = await client.platform.identities.get(identityId);
+
+  const recipientId = process.env.RECIPIENT_ID; // Recipient's ID
+  const recipientIdentity = await client.platform.identities.get(recipientId);
+  console.log('Recipient identity balance before transfer: ', recipientIdentity.balance);
+  const transferAmount = 1000; // Number of credits to transfer
+
+  await client.platform.identities.creditTransfer(
+    identity,
+    recipientId,
+    transferAmount,
+  );
+  return client.platform.identities.get(recipientId);
+};
+
+transferCredits()
+  .then((d) => console.log('Recipient identity balance after transfer: ', d.balance))
+  .catch((e) => console.error('Something went wrong:\n', e))
+  .finally(() => client.disconnect());

README.md

@@ -44,7 +44,9 @@ align with the tutorials section found on the
 After [creating an identity](./1-Identities-and-Names/identity-register.js), set
 the `IDENTITY_ID` value in your `.env` file to your new identity ID. After
 [registering a data contract](./2-Contracts-and-Documents/contract-register-minimal.js),
-set the `CONTRACT_ID` value in your `.env` file to your new contract ID.
+set the `CONTRACT_ID` value in your `.env` file to your new contract ID. To do
+credit transfers between identities, create a second identity and set the
+`RECIPIENT_ID` value in your `.env` file to its ID.
 
 ## Contributing