November 2018
Intermediate to advanced
528 pages
13h 21m
English
Content preview from Blockchain By Example
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Invoking contract methods via a call
A call is a contract instance invocation that doesn't change the contract state, and includes calling view or pure functions or reading public states. The call only runs on the EVM of your local node and saves you the expensive gas as there is no need for broadcasting the transaction. In your init() function, we need exactly that, as we only have to read the contract states. We can call a method foo() on the local blockchain without having to send out a transaction using myContractInstance.foo.call(arg1,arg2...).
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