Can I get the hash of the transaction in the solidity function?

Solidity Global variables and functions

Through this file （ see English document ） We can find About the tradable properties of the block Of Interface with ：

• blockhash(uint blockNumber) returns (bytes32)： Specifies the block hash of the block —— Only for the latest 256 Blocks and does not include the current block

• block.coinbase ( address ): The current address of the miner

• block.difficulty ( uint ): Current block difficulty

• block.gaslimit ( uint ): The current block gas limit

• block.number ( uint ): Current block number

• block.timestamp ( uint): since unix epoch Start the timestamp in seconds of the current block

• gasleft() returns (uint256) ： remainder gas

• msg.data ( bytes ): complete calldata

• msg.sender ( address ): Message sender （ The current call ）

• msg.sig ( bytes4 ): calldata Before 4 byte （ That's the function identifier ）

• msg.value ( uint ): Sent with a message wei The number of

• now (uint): Current block timestamp （ block.timestamp Another name for ）

• tx.gasprice (uint): Traded gas Price

• tx.origin (address payable): Transaction originator （ Complete call chain ）

All as described in the problem , Before the deal is dug up ,hash It doesn't exist .

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