feat: .packAssetLock(outputs)

Author: coolaj86

dashplatform.js

@@ -0,0 +1,50 @@
+//@ts-ignore
+var DashPlatform = ("object" === typeof module && exports) || {};
+(function (window, DashPlatform) {
+  "use strict";
+
+  let DashTx = window.DashTx || require("dashtx");
+
+  let Tx = {};
+
+  /**
+   * ex: 01 01 40420f00 00000000 19 76a914cdfca4ae1cf2333056659a2c 8dc656f36d228402
+   * @param {Object} opts
+   * @param {Uint8} [opts.version]
+   * @param {Array<import('dashtx').TxOutput>} opts.creditOutputs
+   */
+  Tx.packAssetLock = function ({ version = 1, creditOutputs }) {
+    let versionHex = DashTx.utils.toUint32LE(version);
+    versionHex = versionHex.slice(0, 2);
+
+    let lenHex = DashTx.utils.toUint32LE(creditOutputs.length);
+    lenHex = lenHex.slice(0, 2);
+
+    let hexes = [`${versionHex}${lenHex}`];
+    for (let creditOutput of creditOutputs) {
+      //@ts-ignore - TODO check type of TxOutput
+      let script = creditOutput.script;
+      let satsHexLE = DashTx.utils.toUint64LE(creditOutput.satoshis);
+      if (!script) {
+        script = `${satsHexLE}1976a914${creditOutput.pubKeyHash}88ac`;
+      }
+      let assetLock = `${script}`;
+      hexes.push(assetLock);
+    }
+
+    return hexes.join("");
+  };
+
+  //@ts-ignore
+  DashPlatform.Tx = Tx;
+
+  // @ts-ignore
+  window.DashPlatform = DashPlatform;
+})(("object" === typeof window && window) || {}, DashPlatform);
+if ("object" === typeof module) {
+  module.exports = DashPlatform;
+}
+
+/** @typedef {Number} Uint32 */
+/** @typedef {Number} Uint8 */
+/** @typedef {String} Hex */