forked from bch-wallet-web3-spa

deploy/publish-bch.js

@@ -0,0 +1,52 @@
+/*
+  This script will write the CID for the current version of the app to an
+  address on the BCH blockchain. This creates an immutable, censorship-resistant,
+  globally available, and secure pointer to the latest version of the app.
+
+  The exported function expects an IPFS CID as input and returns a TXID for a
+  BCH transaction.
+
+  This function expects this environtment variable to contain a WIF private key
+  with BCH to write to the blockchain:
+  - REACT_BOOTSTRAP_WEB3_SPA_WIF
+*/
+
+// Global npm libraries
+// const BCHJS = require('@psf/bch-js')
+const BchWallet = require('minimal-slp-wallet/index')
+const BchMessageLib = require('bch-message-lib/index')
+
+async function publishToBch (cid) {
+  try {
+    // Get the Filecoin token from the environment variable.
+    const wif = process.env.REACT_BOOTSTRAP_WEB3_SPA_WIF
+    if (!wif) {
+      throw new Error(
+        'WIF private key not detected. Get a private key from https://wallet.fullstack.cash and save it to the REACT_BOOTSTRAP_WEB3_SPA_WIF environment variable.'
+      )
+    }
+
+    // Initialize libraries for working with BCH blockchain.
+    // const bchjs = new BCHJS()
+    const wallet = new BchWallet(wif, {
+      interface: 'consumer-api'
+    })
+    await wallet.walletInfoPromise
+    await wallet.initialize()
+    const bchMsg = new BchMessageLib({ wallet })
+
+    // Publish the CID to the BCH blockchain.
+    const hex = await bchMsg.memo.memoPush(cid, 'IPFS UPDATE')
+
+    // Broadcast the transaction to the network.
+    const txid = await wallet.ar.sendTx(hex)
+    // console.log(`BCH blockchain updated with new CID. TXID: ${txid}`)
+    // console.log(`https://blockchair.com/bitcoin-cash/transaction/${txid}`)
+
+    return txid
+  } catch (err) {
+    console.error(err)
+  }
+}
+
+module.exports = publishToBch