blockchain - ton-solidity中的TL-B方案是什么以及如何使用？

Question

这个问题是关于 Everscale 区 block 链智能合约的 ton-solidity 语言。

有时，我会看到与 TL-B 方案相关的代码。例如，像这样:

function getInvokeMessage(address sender, address recipient, uint128 amount, bool bounce, TvmCell payload) public pure
        returns(TvmCell message) {
        TvmCell body = tvm.encodeBody(MsigDebot.invokeTransaction, sender, recipient, amount, bounce, payload);
        TvmBuilder message_;
        message_.store(false, true, true, false, address(0), address(this));
        message_.storeTons(0);
        message_.storeUnsigned(0, 1);
        message_.storeTons(0);
        message_.storeTons(0);
        message_.store(uint64(0));
        message_.store(uint32(0));
        message_.storeUnsigned(0, 1); //init: nothing$0
        message_.storeUnsigned(1, 1); //body: right$1
        message_.store(body);
        message = message_.toCell();
    }

我需要一步一步的解释，这段代码是做什么的？或者给我解释它的引用文档。

Answer 1

消息构造相应于 TL-B scheme .

一般来说，消息的类型称为“Message X”

该类型有 3 个部分。

第一部分是“CommonMsgInfo”

           /* int_msg_info$0
           ihr_disabled:Bool
           bounce:Bool
           bounced:Bool
           src:MsgAddressInt
           dest:MsgAddressInt */
        message_.store(false, true, true, false, address(0), address(this));
        message_.storeTons(0);//value:CurrencyCollection
        message_.storeUnsigned(0, 1);//value:CurrencyCollection (for other currencies)
        // In the next 4 fields we store zeroes, because blockchain software will replace them
        // with the correct values after this function finishes execution.         
        message_.storeTons(0);//ihr_fee:Grams
        message_.storeTons(0);//fwd_fee:Grams
        message_.store(uint64(0));//created_lt:uint64
        message_.store(uint32(0));//created_at:uint32

第二部分的类型为“init”

        message_.storeUnsigned(0, 1); //no initial state

第三部分的类型为“body”

        message_.storeUnsigned(1, 1); //1 because, we don't store body in current cell
        message_.store(body);