Solididy Global Variables

Global Variables

  ● block.blockhash(uint blockNumber) returns (bytes32): hash of the given block - only works for 256 most recent blocks

  ● block.coinbase (address): current block miner’s address

  ● block.difficulty (uint): current block difficulty

  ● block.gaslimit (uint): current block gaslimit

  ● block.number (uint): current block number

  ● block.timestamp (uint): current block timestamp

  ● msg.data (bytes): complete calldata

  ● msg.gas (uint): remaining gas

  ● msg.sender (address): sender of the message (current call)

  ● msg.value (uint): number of wei sent with the message

  ● now (uint): current block timestamp (alias for block.timestamp)

  ● tx.gasprice (uint): gas price of the transaction

  ● tx.origin (address): sender of the transaction (full call chain)

  ● assert(bool condition): abort execution and revert state changes if condition is false (use for internal error)

  ● require(bool condition): abort execution and revert state changes if condition is false (use for malformed input or error in external component)

  ● revert(): abort execution and revert state changes

  ● keccak256(...) returns (bytes32): compute the Ethereum-SHA-3 (Keccak-256) hash of the (tightly packed) arguments

  ● sha3(...) returns (bytes32): an alias to keccak256

  ● sha256(...) returns (bytes32): compute the SHA-256 hash of the (tightly packed) arguments

  ● ripemd160(...) returns (bytes20): compute the RIPEMD-160 hash of the (tightly packed) arguments

  ● ecrecover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) returns (address): recover address associated with the public key from elliptic curve signature, return zero on error

  ● addmod(uint x, uint y, uint k) returns (uint): compute (x + y) % k where the addition is performed with arbitrary precision and does not wrap around at 2**256

  ● mulmod(uint x, uint y, uint k) returns (uint): compute (x * y) % k where the multiplication is performed with arbitrary precision and does not wrap around at 2**256

  ● this (current contract’s type): the current contract, explicitly convertible to address

  ● super: the contract one level higher in the inheritance hierarchy

  ● selfdestruct(address recipient): destroy the current contract, sending its funds to the given address

  ● suicide(address recipient): an alias to selfdestruct

  ● <address>.balance (uint256): balance of the Address in Wei

  ● <address>.send(uint256 amount) returns (bool): send given amount of Wei to Address, returns false on failure

  ● <address>.transfer(uint256 amount): send given amount of Wei to Address, throws on failure

Global Variables ● block.blockhash(uint blockNumber) returns (bytes32): hash of the given block - only works for 256 most recent blocks ● block.coinbase (address): current block miner’s address ● block.difficulty (uint): current block difficulty ● block.gaslimit (uint): current block gaslimit ● block.number (uint): current block number ● block.timestamp (uint): current block timestamp ● msg.data (bytes): complete calldata ● msg.gas (uint): remaining gas ● msg.sender (address): sender of the message (current call) ● msg.value (uint): number of wei sent with the message ● now (uint): current block timestamp (alias for block.timestamp) ● tx.gasprice (uint): gas price of the transaction ● tx.origin (address): sender of the transaction (full call chain) ● assert(bool condition): abort execution and revert state changes if condition is false (use for internal error) ● require(bool condition): abort execution and revert state changes if condition is false (use for malformed input or error in external component) ● revert(): abort execution and revert state changes ● keccak256(...) returns (bytes32): compute the Ethereum-SHA-3 (Keccak-256) hash of the (tightly packed) arguments ● sha3(...) returns (bytes32): an alias to keccak256 ● sha256(...) returns (bytes32): compute the SHA-256 hash of the (tightly packed) arguments ● ripemd160(...) returns (bytes20): compute the RIPEMD-160 hash of the (tightly packed) arguments ● ecrecover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) returns (address): recover address associated with the public key from elliptic curve signature, return zero on error ● addmod(uint x, uint y, uint k) returns (uint): compute (x + y) % k where the addition is performed with arbitrary precision and does not wrap around at 2**256 ● mulmod(uint x, uint y, uint k) returns (uint): compute (x * y) % k where the multiplication is performed with arbitrary precision and does not wrap around at 2**256 ● this (current contract’s type): the current contract, explicitly convertible to address ● super: the contract one level higher in the inheritance hierarchy ● selfdestruct(address recipient): destroy the current contract, sending its funds to the given address ● suicide(address recipient): an alias to selfdestruct ● <address>.balance (uint256): balance of the Address in Wei ● <address>.send(uint256 amount) returns (bool): send given amount of Wei to Address, returns false on failure ● <address>.transfer(uint256 amount): send given amount of Wei to Address, throws on failure