src/bpf-loader.js
// @flow
import {Account} from './account';
import {PublicKey} from './publickey';
import {Loader} from './loader';
import {SystemProgram} from './system-program';
import {sendAndConfirmTransaction} from './util/send-and-confirm-transaction';
import type {Connection} from './connection';
/**
* Factory class for transactions to interact with a program loader
*/
export class BpfLoader {
/**
* Public key that identifies the BpfLoader
*/
static get programId(): PublicKey {
return new PublicKey(
'0x8000000000000000000000000000000000000000000000000000000000000000',
);
}
/**
* Load a BPF program
*
* @param connection The connection to use
* @param owner User account to load the program into
* @param elfBytes The entire ELF containing the BPF program
*/
static async load(
connection: Connection,
owner: Account,
elf: Array<number>,
): Promise<PublicKey> {
const programAccount = new Account();
const transaction = SystemProgram.createAccount(
owner.publicKey,
programAccount.publicKey,
1,
elf.length,
BpfLoader.programId,
);
await sendAndConfirmTransaction(connection, owner, transaction);
const loader = new Loader(connection, BpfLoader.programId);
await loader.load(programAccount, elf);
await loader.finalize(programAccount);
return programAccount.publicKey;
}
}