chore: migrate to typescript

web3.js/src/util/cluster.ts

@@ -1,8 +1,3 @@
-//@flow
-
-/**
- * @private
- */
 const endpoint = {
   http: {
     devnet: 'http://devnet.solana.com',

web3.js/src/util/promise-timeout.ts

@@ -1,15 +1,13 @@
-// @flow
-
 export function promiseTimeout<T>(
   promise: Promise<T>,
   timeoutMs: number,
 ): Promise<T | null> {
-  let timeoutId: TimeoutID;
-  const timeoutPromise = new Promise(resolve => {
+  let timeoutId: ReturnType<typeof setTimeout>;
+  const timeoutPromise: Promise<null> = new Promise(resolve => {
     timeoutId = setTimeout(() => resolve(null), timeoutMs);
   });
 
-  return Promise.race([promise, timeoutPromise]).then(result => {
+  return Promise.race([promise, timeoutPromise]).then((result: T | null) => {
     clearTimeout(timeoutId);
     return result;
   });

web3.js/src/util/send-and-confirm-raw-transaction.ts

@@ -1,5 +1,3 @@
-// @flow
-
 import {Connection} from '../connection';
 import type {TransactionSignature} from '../transaction';
 import type {ConfirmOptions} from '../connection';

web3.js/src/util/send-and-confirm-transaction.ts

@@ -1,5 +1,3 @@
-// @flow
-
 import {Connection} from '../connection';
 import {Transaction} from '../transaction';
 import type {Account} from '../account';

web3.js/src/util/shortvec-encoding.ts

@@ -1,10 +1,8 @@
-// @flow
-
 export function decodeLength(bytes: Array<number>): number {
   let len = 0;
   let size = 0;
   for (;;) {
-    let elem = bytes.shift();
+    let elem = bytes.shift() as number;
     len |= (elem & 0x7f) << (size * 7);
     size += 1;
     if ((elem & 0x80) === 0) {

web3.js/src/util/sleep.ts

@@ -1,5 +1,3 @@
-// @flow
-
 // zzz
 export function sleep(ms: number): Promise<void> {
   return new Promise(resolve => setTimeout(resolve, ms));

web3.js/src/util/to-buffer.ts

@@ -1,5 +1,3 @@
-// @flow
-
 import {Buffer} from 'buffer';
 
 export const toBuffer = (arr: Buffer | Uint8Array | Array<number>): Buffer => {