feat: Add initial atomic swap

shakedex/context.js

@@ -0,0 +1,77 @@
+const { NodeClient, WalletClient } = require('hsd/lib/client');
+const Network = require('hsd/lib/protocol/network.js');
+const passwordPrompt = require('password-prompt');
+
+class Context {
+  constructor(
+    networkName,
+    walletId,
+    apiKey,
+    passphraseGetter = noopPassphraseGetter,
+    host = '127.0.0.1',
+    nodeApiKey,
+  ) {
+    this.networkName = networkName;
+    this.network = Network.get(networkName);
+    this.walletId = walletId;
+    this.nodeClient = new NodeClient({
+      port: this.network.rpcPort,
+      host,
+      apiKey: nodeApiKey || apiKey,
+    });
+    this.walletClient = new WalletClient({
+      port: this.network.walletPort,
+      host,
+      apiKey: apiKey,
+    });
+    this.wallet = this.walletClient.wallet(walletId);
+    this.passphraseGetter = passphraseGetter;
+  }
+
+  getPassphrase = () => {
+    return this.passphraseGetter();
+  };
+
+  execNode = (method, ...args) => {
+    return this.nodeClient.execute(method, args);
+  };
+
+  execWallet = async (method, ...args) => {
+    await this.walletClient.execute('selectwallet', [this.walletId]);
+    return this.walletClient.execute(method, args);
+  };
+
+  unlockWallet = async () => {
+    const pass = await this.getPassphrase();
+    if (pass === null) {
+      return;
+    }
+    await this.wallet.unlock(pass, 60);
+  };
+
+  getMTP = async () => {
+    const info = await this.execNode('getblockchaininfo');
+    return info.mediantime;
+  };
+
+  getHeight = async () => {
+    const info = await this.execNode('getblockchaininfo');
+    return info.blocks;
+  };
+}
+
+exports.Context = Context;
+
+exports.staticPassphraseGetter = function (passphrase) {
+  return () => new Promise((resolve) => resolve(passphrase));
+};
+
+function noopPassphraseGetter() {
+  return new Promise((resolve) => resolve(null));
+}
+
+exports.promptPassphraseGetter = function (
+  prefix = '>> Please enter your passphrase: '
+) {
+  return () => new Promise((resolve) => resolve(passwordPrompt(prefix)));
+};