fix: Remove fs dep, bpf_loader now takes ELF as bytes

web3.js/src/bpf-loader.js

@@ -1,6 +1,5 @@
 // @flow
 
-import fs from 'mz/fs';
 import elfy from 'elfy';
 
 import {Account, PublicKey, Loader, SystemProgram} from '.';
@@ -12,31 +11,29 @@ import type {Connection} from '.';
  */
 export class BpfLoader {
   /**
-   * Public key that identifies the NativeLoader
+   * Public key that identifies the BpfLoader
    */
   static get programId(): PublicKey {
     return new PublicKey('0x0606060606060606060606060606060606060606060606060606060606060606');
   }
 
   /**
-   * Loads a BPF program
+   * Load a BPF program
    *
    * @param connection The connection to use
-   * @param owner User account to load the program with
-   * @param programName Name of the BPF program
+   * @param owner User account to load the program into
+   * @param elfBytes the entire ELF containing the BPF program in its .text.entrypoint section
    */
   static async load(
     connection: Connection,
     owner: Account,
-    programName: string,
+    elfBytes: Array<number>,
   ): Promise<PublicKey> {
     const programAccount = new Account();
 
-    const data = await fs.readFile(programName);
-    const elf = elfy.parse(data);
+    const elf = elfy.parse(elfBytes);
     const section = elf.body.sections.find(section => section.name === '.text.entrypoint');
 
-    // Allocate memory for the program account
     const transaction = SystemProgram.createAccount(
       owner.publicKey,
       programAccount.publicKey,

web3.js/src/loader.js

@@ -51,7 +51,7 @@ export class Loader {
     const transactions = [];
     while (array.length > 0) {
       const bytes = array.slice(0, chunkSize);
-      let userdata = Buffer.alloc(chunkSize + 16);
+      const userdata = Buffer.alloc(chunkSize + 16);
       userdataLayout.encode(
         {
           instruction: 0, // Load instruction

web3.js/test/bpf-loader.test.js

@@ -1,5 +1,7 @@
 // @flow
 
+import fs from 'mz/fs';
+
 import {
   Connection,
   BpfLoader,
@@ -23,7 +25,8 @@ test('load BPF program', async () => {
 
   const connection = new Connection(url);
   const from = await newAccountWithTokens(connection);
-  const programId = await BpfLoader.load(connection, from, 'test/bin/noop_c.o');
+  const data = await fs.readFile('test/bin/noop_c.o');
+  const programId = await BpfLoader.load(connection, from, data);
   const transaction = new Transaction().add({
     keys: [from.publicKey],
     programId,