Different Form Ethereum

Currency

Like solidity supports ETH, Vision VM supports VS and vdt, 1 VS = 1000000 vdt, case sensitive, only support lower case. Vision-IDE supports VS and vdt, remix does not support VS and vdt. We recommend to use Vision-IDE instead of remix to build Vision smart contract.

Block

• block.blockhash (uint blockNumber) returns (bytes32): specified block * hash, can only apply to the latest 256 blocks and current block excluded

• block.coinbase (address): SuperNode address that produced the current block

• block.difficulty (uint): current block difficulty, not recommended, set 0

• block.gaslimit (uint): current block gas limit, not supported, set 0

• block.number (uint): current block number

• block.timestamp (uint): current block timestamp

• gasleft() returns (uint256): remaining gas

• msg.data (bytes): complete call data

• msg.gas (uint): remaining gas - since 0.4.21, not recommended, replaced by gesleft()

• msg.sender (address): message sender (current call)

• msg.sig (bytes4): first 4 bytes of call data (function identifier)

• msg.value (uint): the amount of vdt send with message

• now (uint): current block timestamp (block.timestamp)

• tx.gasprice (uint): the gas price of transaction, not recommended, set 0

• tx.origin (address): transaction initiator

• Each command of smart contract consume system resource while running, we use 'Entropy' as the unit of the consumption of the resource.