Update pyrlp version

[ChihChengLiang]

Issue

Recently the pyrlp upgraded to 1.0.0-beta and introduced some breaking changes, such as removing encode_hex and decode_hex functions ethereum/pyrlp#55 .

Suggested implementation

• upgrade rlp >= 1.0.0-beta in requirements.txt
• replace all broken functions in the codebase with functions from https://github.com/ethereum/eth-utils .

[hrishikeshio]

There are dependency issues ethereum/pydevp2p#95

casper depends on pydevp2p which requires rlp<1. This is because devp2p is python2 and python3 compatible but rlp>1 and eth_utils are not compatible with python2.

[djrtwo]

Thanks for looking into this!

[djrtwo]

Any update on this one?

[hrishikeshio]

@djrtwo. It's blocked. How do we proceed? We have to make pydevp2p python 3 only... Is that ok?
Or else we have to pin pydevp2p dependency to rlp<1

[ChihChengLiang]

ah ... sorry @hrishikeshio , most of the packages in requirements.txt are not required now. The pydevp2p was used by a casper daemon that is removed recently. I'll clean up the requirements.txt and you should able to work on this soon.

[djrtwo]

should be unblocked @hrishikeshio

[hrishikeshio]

Thanks guys. But now it seems pyethereum upgraded to rlp 1 only in the very recent commit. and the build is failing. ethereum/pyethereum@6c7cf77

Created this issue.
ethereum/pyethereum#876

[hrishikeshio]

Now its blocked because of this ethereum/pyethereum#879

[djrtwo]

This is going to be fixed in #150 becuase I am getting rid of the pyethereum dependency. I'll take it from here. Thanks for your help digging @hrishikeshio

[djrtwo]

addressed in #150