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October 14, 2020 11:14
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| import * as bip32 from 'bip32'; | |
| import * as BufferLayout from 'buffer-layout'; | |
| import _ from 'lodash'; | |
| import nacl from 'tweetnacl'; | |
| import { Service } from 'typedi'; | |
| import { | |
| Account, Connection, PublicKey, SystemProgram, SYSVAR_RENT_PUBKEY, Transaction, | |
| TransactionInstruction | |
| } from '@solana/web3.js'; | |
| import { env } from '../../env'; | |
| import { SolanaAccountQuery } from '../controllers/requests/SolanaQuery'; | |
| @Service() | |
| export class SolanaService { | |
| public async getTransactions( | |
| solanaAccountQuery: SolanaAccountQuery | |
| ): Promise<object> { | |
| const ACCOUNT_LAYOUT = BufferLayout.struct([ | |
| BufferLayout.blob(32, 'mint'), | |
| BufferLayout.blob(32, 'owner'), | |
| BufferLayout.nu64('amount'), | |
| BufferLayout.blob(93), | |
| ]); | |
| const TOKEN_PROGRAM_ID = new PublicKey( | |
| 'TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA' | |
| ); | |
| const headers = {}; | |
| const endpoint = env.solana.mainNetUrl; | |
| const params = { headers, method: 'POST' }; | |
| const path = `coins/eth/${solanaAccountQuery.token}`; | |
| headers['Content-Type'] = 'application/json'; | |
| const resp: any = await fetch(`https://swap.sollet.io/api/${path}`, params); | |
| let json = await resp.json(); | |
| json = json.result; | |
| const mint = new PublicKey(json.splMint); | |
| const bip39 = await import('bip39'); | |
| let seed: any = await bip39.mnemonicToSeed(solanaAccountQuery.mnemonic); | |
| seed = Buffer.from(seed, 'hex'); | |
| const connection = new Connection(endpoint, 'recent'); | |
| const derivedSeed = bip32 | |
| .fromSeed(seed) | |
| .derivePath(`m/501'/0'/0/0`).privateKey; | |
| const account = new Account(nacl.sign.keyPair.fromSeed(derivedSeed).secretKey); | |
| const newAccount = new Account(); | |
| const transaction = new Transaction(); | |
| console.log(transaction) // when I console this I see empty signature array whereas when I console the tx object just after this line https://github.com/project-serum/spl-token-wallet/blob/master/src/utils/tokens/index.js#L128 I see signatures array populated I am using the latest solana web3 version | |
| transaction.add( | |
| SystemProgram.createAccount({ | |
| fromPubkey: account.publicKey, | |
| newAccountPubkey: newAccount.publicKey, | |
| lamports: await connection.getMinimumBalanceForRentExemption( | |
| ACCOUNT_LAYOUT.span | |
| ), | |
| space: ACCOUNT_LAYOUT.span, | |
| programId: TOKEN_PROGRAM_ID, | |
| }) | |
| ); | |
| transaction.add( | |
| await this.initializeAccount({ | |
| account: newAccount.publicKey, | |
| mint, | |
| owner: account.publicKey, | |
| }) | |
| ); | |
| return transaction; | |
| } | |
| public async initializeAccount({ account, mint, owner }) { | |
| const TOKEN_PROGRAM_ID = new PublicKey( | |
| 'TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA' | |
| ); | |
| const keys = [ | |
| { pubkey: account, isSigner: false, isWritable: true }, | |
| { pubkey: mint, isSigner: false, isWritable: false }, | |
| { pubkey: owner, isSigner: false, isWritable: false }, | |
| { pubkey: SYSVAR_RENT_PUBKEY, isSigner: false, isWritable: false }, | |
| ]; | |
| return new TransactionInstruction({ | |
| keys, | |
| data: await this.encodeTokenInstructionData({ | |
| initializeAccount: {}, | |
| }), | |
| programId: TOKEN_PROGRAM_ID, | |
| }); | |
| } | |
| public async encodeTokenInstructionData(instruction: any) { | |
| const LAYOUT = BufferLayout.union(BufferLayout.u8('instruction')); | |
| LAYOUT.addVariant( | |
| 0, | |
| BufferLayout.struct([ | |
| BufferLayout.u8('decimals'), | |
| BufferLayout.blob(32, 'mintAuthority'), | |
| BufferLayout.u8('freezeAuthorityOption'), | |
| BufferLayout.blob(32, 'freezeAuthority'), | |
| ]), | |
| 'initializeMint' | |
| ); | |
| LAYOUT.addVariant(1, BufferLayout.struct([]), 'initializeAccount'); | |
| LAYOUT.addVariant( | |
| 3, | |
| BufferLayout.struct([BufferLayout.nu64('amount')]), | |
| 'transfer' | |
| ); | |
| LAYOUT.addVariant( | |
| 7, | |
| BufferLayout.struct([BufferLayout.nu64('amount')]), | |
| 'mintTo' | |
| ); | |
| LAYOUT.addVariant( | |
| 8, | |
| BufferLayout.struct([BufferLayout.nu64('amount')]), | |
| 'burn' | |
| ); | |
| LAYOUT.addVariant(9, BufferLayout.struct([]), 'closeAccount'); | |
| const instructionMaxSpan = Math.max( | |
| ...Object.values(LAYOUT.registry).map((r: any) => r.span) | |
| ); | |
| const b = Buffer.alloc(instructionMaxSpan); | |
| const span = LAYOUT.encode(instruction, b); | |
| return b.slice(0, span); | |
| } | |
| } |
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