rewriting in opal - notes

Author: makevoid

Readme.md

@@ -66,7 +66,7 @@ const pushTx    = require('./blockchain-api/push-tx')
 
 ```
 
-Creating a private key and sending a bitcoin transaction in 30 lines of code - youtube video explainer #coding #bitcoin #tx #utxo #bitcoin-tx #bitcoin-utxo
+Creating a private key and sending a bitcoin transaction in 30 lines of code - youtube video explainer (WIP) #coding #bitcoin #tx #utxo #bitcoin-tx #bitcoin-utxo
 
 
 ---

tmp/media/screenshot.png

@@ -0,0 +1,90 @@
+# rewrite using a dsl dialect
+
+# TODO: implement DSL, run via opal
+
+def require(module)
+  # call node's require
+end
+
+def File.read
+  "...."
+end
+
+def bitcore
+  obj = Object.new
+  def obj.private_key
+    "K..."
+  end
+  def obj.transaction
+    "x...."
+  end
+end
+
+def bitcore.privatekey
+
+end
+
+# ----
+
+# final code:
+
+bitcore = require('bitcore-lib')
+PrivateKey  = bitcore.private_key
+Transaction = bitcore.transaction
+
+pvt_key_string = File.read.strip()
+pvt_key = PrivateKey.new pvt_key_string
+
+address = pvt_key.toAddress()
+
+puts "private key: ${pvt_key}"
+
+
+# ----
+
+const { readFileSync } = require('fs')
+const bitcoin = require('bitcore-lib')
+const { PrivateKey, Transaction } = bitcoin
+
+const pvtKeyString = readFileSync('./private-key.txt').toString().trim()
+const pvtKey = new PrivateKey(pvtKeyString)
+
+const address = pvtKey.toAddress().toString()
+
+console.log("private key:", pvtKey.toString())
+console.log("address:", address)
+
+// --- 6 lines
+
+const getUTXOs  = require('./blockchain-api/get-utxos')
+const pushTx    = require('./blockchain-api/push-tx')
+// const { pushTx, getUTXOs } = require('./blockchain-api') // TODO: NPM MODULE
+
+;(async () => {
+  try {
+    let utxos = await getUTXOs({ address })
+
+    utxos = [ utxos[0] ]
+
+    console.log("utxos:", utxos)
+
+    const amount = 10000 // 10k sats (0.1mbtc)
+
+    const tx = new Transaction()
+      .from(utxos)
+      .to(address, amount)
+      .change(address)
+      .fee(1000)
+      .sign(pvtKey)
+
+    const txHex = tx.serialize()
+
+    console.log("tx:", txHex)
+
+    const { success, txHash } = pushTx(txHex)
+    console.log("success:", success, "txHash:", txHash)
+
+  } catch (err) {
+    console.error(err)
+  }
+})()