Dependency issue with ./libs/eth-lightwallet/keystore

[6d7a]

Occured running api-blockchain-core v.2.19.0

Issue

Code copied from ConsenSys' Lightwallet is deprecated.
Methods for string encoding are called on the imported Tweetnacl package
These utils for encoding/decoding strings were moved into separate package

Please review these dependencies and update the copied Lightwallet library as well as the tweetnacl-util dependency if you run into the same issue.

Thanks