Hello

This article provides a Java implementation of the ERC-20 interface that can be installed and instantiated on a Hyperledger Fabric network.

With a special focus on simulating addresses from X.509 certificates and storing Java objects.

Since version 0.4.22 of Solidity it is possible to provide an optional reason argument with the revert and require function.

This article gives an explanation on how to retrieve this revert reason with Web3j's EthCall.

The bytes type in Solidity is a dynamically-sized byte array. That makes it ideal for interfaces with delegation functionality to be generic; all function arguments can be encapsulated into one bytes argument. Examples are ERC223's transfer, ERC677's transferAndCall and ERC777's send functions.

This article will give an overview about how to parse the (concatenated) bytes in bytes into the types they were intended to be before they were concatenated into one generic bytes instance.