Vu's Blog

  Solidity have certain restrictions on use of a Library: Library functions can be called directly if they do not modify the state. That means pure or view functions only can be called from outside the library . Library can not be destroyed as it is assumed to be stateless. A Library cannot have state variables . A Library cannot inherit from any element. A Library cannot be inherited.

  Fallback function is a special function available to a contract. It has following features − It is called when a non-existent function is called on the contract. It is required to be marked external. It has no name. It has no arguments It can not return any thing. It can be defined one per contract. If not marked payable, it will throw exception if contract receives plain ether without data.

Address.transfer() Address.send() Address.call.value() Address.delegatecall() Stipend of  2300  gas along. Stipend of  2300  gas along. All gas will be sent along.   Used to  transfer funds  out of a smart contract to “someAddress”. Used to  transfer funds  out of a smart contract to “someAddress”. Interact and send ether  to the “Address”. Which uses the scope of the  current calling contract  and is mostly  used for libraries . Which is a  high-level function , there is an exception happening during the transfer, it  cascading exceptions . Low-level function , there is an exception happening during the transfer, it  returns “false”. Low-level function , there is an exception happening during the transfer, it  returns “false”. Low-level function , there is an exception happening during the transfer, it  returns “false”. Safe against re-entrancy  because they send only the gas-stipend of 2300 gas along. Safe against re-entrancy  because they send o