token-contract/jetton-wallet.fc at main · Re29066/token-contract · GitHub

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#pragma version >=0.4.3;

#include "stdlib.fc";
#include "op-codes.fc";

struct JettonWalletData {
    balance: Int;
    owner: Address;
    master: Address;
    walletCode: Cell;
}

message(0xf8a7ea5) TokenTransfer {
    queryId: Int as uint64;
    amount: Int as coins;
    destination: Address;
    response_destination: Address;
    custom_payload: Cell?;
    forward_ton_amount: Int as coins;
    forward_payload: Slice as remaining;
}

message(0x178d4519) TokenTransferInternal {
    queryId: Int as uint64;
    amount: Int as coins;
    from: Address;
    response_destination: Address;
    forward_ton_amount: Int as coins;
    forward_payload: Slice as remaining;
}

message(0x7362d09c) TokenNotification {
    queryId: Int as uint64;
    amount: Int as coins;
    from: Address;
    forward_payload: Slice as remaining;
}

message(0x595f07bc) TokenBurn {
    queryId: Int as uint64;
    amount: Int as coins;
    owner: Address;
    response_destination: Address;
}

message(0x7bdd97de) TokenBurnNotification {
    queryId: Int as uint64;
    amount: Int as coins;
    owner: Address;
    response_destination: Address?;
}

message(0xd53276db) TokenExcesses {
    queryId: Int as uint64;
}

message TokenUpdateContent {
    content: Cell;
}

contract JettonWallet {
    var balance: Int;
    var owner: Address;
    var master: Address;
    var minTonsForStorage: Int;
    var gasConsumption: Int;

    () init() {
        self.balance = 0;
        self.minTonsForStorage = 1000000; // 0.001 TON
        self.gasConsumption = 100000; // 0.0001 TON
    }

    () check_owner() inline {
        require(ctx.sender == self.owner, "Invalid sender");
    }

    receive(msg: TokenTransfer) {
        let ctx: Context = context();
        check_owner();

        self.balance = self.balance - msg.amount;
        require(self.balance >= 0, "Insufficient balance");

        send(SendParameters {
            to: msg.destination,
            value: 0,
            mode: SendRemainingValue,
            bounce: true,
            body: TokenNotification {
                queryId: msg.queryId,
                amount: msg.amount,
                from: ctx.sender,
                forward_payload: msg.forward_payload
            }.toCell()
        });

        if (msg.response_destination != null) {
            send(SendParameters {
                to: msg.response_destination,
                value: ctx.value,
                bounce: false,
                body: TokenExcesses {
                    queryId: msg.queryId
                }.toCell(),
                mode: SendIgnoreErrors
            });
        }
    }

    receive(msg: TokenBurn) {
        let ctx: Context = context();
        check_owner();

        self.balance = self.balance - msg.amount;
        require(self.balance >= 0, "Insufficient balance");

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

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

    bounced(src: bounced<TokenTransferInternal>) {
        self.balance = self.balance + src.amount;
    }

    bounced(src: bounced<TokenBurnNotification>) {
        self.balance = self.balance + src.amount;
    }

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