bton/contracts/main.ts

import BN from "bn.js";
import {Address, beginCell, Cell, contractAddress, TonClient, WalletContract, WalletV3R2Source} from "ton";
import {mnemonicToWalletKey} from "ton-crypto";

// encode contract storage according to save_data() contract method
// storage#_ total_supply:Coins admin_address:MsgAddress next_admin_address:MsgAddress content:^Cell jetton_wallet_code:^Cell = Storage;
export function minterData(params: { adminAddress: Address; supply: number, nextAdminAddress?: Address, content: Cell, wallet_code: Cell }): Cell {
    if (!params.nextAdminAddress) params.nextAdminAddress = params.adminAddress;
    return beginCell()
        .storeCoins(params.supply)
        .storeAddress(params.adminAddress)
        .storeAddress(params.nextAdminAddress)
        .storeRef(params.content)
        .storeRef(params.wallet_code)
        .endCell();
}

function bufferToChunks(buff: Buffer, chunkSize: number) {
    let chunks: Buffer[] = []
    while (buff.byteLength > 0) {
        chunks.push(buff.slice(0, chunkSize))
        buff = buff.slice(chunkSize)
    }
    return chunks
}

export function makeSnakeCell(data: Buffer) {
    let chunks = bufferToChunks(data, 127)
    let rootCell = new Cell()
    let curCell = rootCell

    for (let i = 0; i < chunks.length; i++) {
        let chunk = chunks[i]

        curCell.bits.writeBuffer(chunk)

        if (chunks[i + 1]) {
            let nextCell = new Cell()
            curCell.refs.push(nextCell)
            curCell = nextCell
        }
    }

    return rootCell
}

export function getMinterAddress(params: { adminAddress: Address; supply: number, nextAdminAddress?: Address, content: Cell, wallet_code: Cell }, initCodeCell: Cell): Address {
    return contractAddress({workchain: 0, initialData: minterData(params), initialCode: initCodeCell});
}

const OFF_CHAIN_CONTENT_PREFIX = 0x01

export function encodeOffChainContent(content: string) {
    let data = Buffer.from(content)
    let offChainPrefix = Buffer.from([OFF_CHAIN_CONTENT_PREFIX])
    data = Buffer.concat([offChainPrefix, data])
    return makeSnakeCell(data)
}

// storage#_ balance:(VarUInteger 16) owner_address:MsgAddressInt jetton_master_address:MsgAddressInt jetton_wallet_code:^Cell = Storage;
export function walletData(params: { balance: number, ownerAddress: Address, jettonMasterAddress: Address, jettonWalletCode: Cell }): Cell {
    return beginCell()
        .storeUint(params.balance, 15)
        .storeAddress(params.ownerAddress)
        .storeAddress(params.jettonMasterAddress)
        .storeRef(params.jettonWalletCode)
        .endCell();
}


export function TON(): number {
    return 1000000000;
}

// message encoders for all ops (see contracts/imports/constants.fc for consts)

export function depositMsg(amount: number): Cell {
    return beginCell().storeUint(0x77a33521, 32)
        .storeUint(0, 64).storeCoins(amount).endCell();
}

export function withdrawMsg(params: { withdrawAmount: BN }): Cell {
    return beginCell().storeUint(0x47d1895f, 32).storeUint(0, 64).storeCoins(params.withdrawAmount).endCell();
}

export async function getWallet(isTestnet: boolean = true) {
    const client = new TonClient({
        endpoint: `https://${isTestnet ? "testnet." : ""}toncenter.com/api/v2/jsonRPC`,
        apiKey: isTestnet ? 'bed2b4589201ff3c575be653593f912a337c08eed416b60b02345763b9ee9c36' : 'a1e8a1055a387515158589dc7e9bad3035e7db2b9f9ea5cdad6b727f71e328db'
    });
    let deployerMnemonic = process.env.DEPLOYER_MNEMONIC;
    if (!deployerMnemonic) throw new Error("DEPLOYER_MNEMONIC env var is not set");

    // open the wallet and make sure it has enough TON
    const walletKey = await mnemonicToWalletKey(deployerMnemonic.split(" "));
    let workchain = 0;
    return [WalletContract.create(client, WalletV3R2Source.create({
        publicKey: walletKey.publicKey,
        workchain
    })), walletKey];
}