Remove public var transaction: CodableTransaction uses

[JeneaVranceanu]

What happened?

The use of public var transaction: CodableTransaction in ERCs and Web3.Contract only leads to side-effects. CodableTransaction must be created when we call a function and disposed of immediately when we are done with that particular call. CodableTransaction must be kept local as much as possible, at least when it comes to ERCs implementations and Web3.Contract. Keeping CodableTransaction that is reused across the lifespan of a Web3.Contract object will lead to side-effects eventually.

What are the steps to reproduce?

What is the expected behavior?

Remove public var transaction: CodableTransaction from the following classes:

What is the error thrown?

What's the stack trace said?

OS version

Library version

https://github.com/web3swift-team/web3swift/tree/5063ca5067700f2826e7a19ae29bedce6b74bcc5