tonb/sources/wallet.tact

import "@stdlib/ownable";
import "./messages";
import "./linker";



@interface("org.ton.jetton.wallet")
contract TONBWallet {

    const minTonsForStorage: Int = ton("0.01");
    const gasConsumption: Int = ton("0.01");

    balance: Int;
    owner: Address;
    master: Address;
    linker: Address?;

    init(master: Address, owner: Address) {
        self.balance = 0;
        self.owner = owner;
        self.master = master;
    }

    receive(msg: TokenTransfer) {

        // Check sender
        let ctx: Context = context();
        require(ctx.sender == self.owner, "Invalid sender");

        // Update balance
        self.balance = self.balance - msg.amount;
        require(self.balance >= 0, "Invalid balance");

        // Gas checks
        let fwdFee: Int = ctx.readForwardFee();
        let fwdCount: Int = 1;
        if (msg.forwardTonAmount > 0) {
            fwdCount = 2;
        }
        require(ctx.value > fwdCount * fwdFee + 2 * self.gasConsumption + self.minTonsForStorage, "Invalid value");
  
        // Send tokens
        let init: StateInit = initOf TONBWallet(self.master, msg.destination);
        let walletAddress: Address = contractAddress(init);
        send(SendParameters{
            to: walletAddress, 
            value: 0,
            mode: SendRemainingValue, 
            bounce: true,
            body: TokenTransferInternal{
                amount: msg.amount,
                queryId: msg.queryId,
                from: self.owner,
                responseAddress: self.owner,
                forwardTonAmount: msg.forwardTonAmount,
                forwardPayload: msg.forwardPayload,
                setLinker: null
            }.toCell(),
            code: init.code,
            data: init.data
        });
    }

    receive(msg: TokenTransferInternal) {

        // Check sender
        let ctx: Context = context();
        if (self.linker == null) {
            self.linker = msg.setLinker;
        }
        if (ctx.sender != self.master && ctx.sender != self.linker) {
            let sinit: StateInit = initOf TONBWallet(self.master, msg.from);
            require(contractAddress(sinit) == ctx.sender, "Invalid sender");
        }

        // Update balance
        self.balance = self.balance + msg.amount;
        require(self.balance >= 0, "Invalid balance");

        // Adjust value for gas
        let msgValue: Int = ctx.value;
        let tonBalanceBeforeMsg: Int = myBalance() - msgValue;
        let storageFee: Int = self.minTonsForStorage - min(tonBalanceBeforeMsg, self.minTonsForStorage);
        msgValue = msgValue - (storageFee + self.gasConsumption);

        // Forward ton
        if (msg.forwardTonAmount > 0) {
            let fwdFee: Int = ctx.readForwardFee();
            msgValue = msgValue - (msg.forwardTonAmount + fwdFee);
            send(SendParameters{
                to: self.owner,
                value: msg.forwardTonAmount,
                bounce: false,
                body: TokenNotification{
                    queryId: msg.queryId,
                    amount: msg.amount,
                    from: msg.from,
                    forwardPayload: msg.forwardPayload
                }.toCell()
            });
        }

        // Cashback
        if (msg.responseAddress != null && msgValue > 0) {
            send(SendParameters{
                to: msg.responseAddress!!,
                value: msgValue,
                bounce: false,
                body: TokenExcesses{
                    queryId: msg.queryId
                }.toCell()
            });
        }
    }

    receive(msg: TokenBurn) {

        // Check sender
        let ctx: Context = context();
        require(ctx.sender == self.owner || ctx.sender == self.master || ctx.sender == self.linker, "Invalid sender");

        // Update balance
        self.balance = self.balance - msg.amount;
        require(self.balance >= 0, "Invalid balance");

        // Gas checks
        let fwdFee: Int = ctx.readForwardFee();
        require(ctx.value > fwdFee + 2 * self.gasConsumption + self.minTonsForStorage, "Invalid value");

        // Burn tokens
        send(SendParameters{
            to: self.master,
            value: 0,
            mode: SendRemainingValue,
            bounce: true,
            body: TokenBurnNotification{
                queryId: msg.queryId,
                amount: msg.amount,
                owner: self.owner,
                responseAddress: self.owner
            }.toCell()
        });
    }

    bounced(msg: Slice) {

        // Parse bounced message
        msg.skipBits(32); // 0xFFFFFFFF
        let op: Int = msg.loadUint(32);
        let queryId: Int = msg.loadUint(64);
        let jettonAmount: Int = msg.loadCoins();
        require(op == 0x178d4519 || op == 0x7bdd97de, "Invalid bounced message");

        // Update balance
        self.balance = self.balance + jettonAmount;
    }

    get fun get_wallet_data(): JettonWalletData {
        return JettonWalletData{
            balance: self.balance,
            owner: self.owner,
            master: self.master,
            walletCode: (initOf TONBWallet(self.master, self.owner)).code
        };
    }
}