feat: Add sendAndConfirmTransaction

Author: mvines

src/util/send-and-confirm-transaction.js

@@ -0,0 +1,32 @@
+// @flow
+
+import {Connection, Transaction} from '..';
+
+import {sleep} from './sleep';
+
+import type {Account} from '..';
+
+/**
+ * Sign, send and confirm a transaction
+ */
+export async function sendAndConfirmTransaction(
+  connection: Connection,
+  from: Account,
+  transaction: Transaction,
+  runtimeErrorOk: boolean = false
+): Promise<void> {
+  const signature = await connection.sendTransaction(from, transaction);
+
+  // Wait up to a couple seconds for a confirmation
+  let i = 4;
+  for (;;) {
+    const status = await connection.getSignatureStatus(signature);
+    if (status == 'Confirmed') return;
+    if (runtimeErrorOk && status == 'ProgramRuntimeError') return;
+    await sleep(500);
+    if (--i < 0) {
+      throw new Error(`Transaction '${signature}' was not confirmed (${status})`);
+    }
+  }
+}
+

src/util/sleep.js

@@ -0,0 +1,6 @@
+// @flow
+
+// zzz
+export function sleep(ms: number): Promise<void> {
+  return new Promise(resolve => setTimeout(resolve, ms));
+}