Connect Primitives to Layers

[KtorZ]

Issue Number

#69

Overview

• reviewed CLI Decodable / Encodable to allow decoding from a list of string
• made the entropy a ScrubbedBytes rather than a ByteString
• moved wallet metadata in Cardano.Wallet & define a basic wallet worker
• made 'tick' pass whatever is fetched from the source
• reviewed DBLayer & define a dummy db-layer with an MVar
• Kept track of current network tip in the Wallet business logic
• linked primitives together in the wallet server and do basic wallet work

Comments

This is a rather big PR, I'll split that in multiple smaller ones as I also introduce various tests. I wanted to test the full pipeline and it's rather okay so far. The wallet processes blocks from the chain producer at a rather decent pace (~4000 blocks per second).

$ stack build --fast --profile --exec "stack exec -- cardano-wallet-server xxx xxx xxx xxx xxx... +RTS -h -p -RTS"

Current tip: -0.21544
Available balance: 0 Lovelaces
Current tip: 1.21597
Available balance: 0 Lovelaces
Current tip: 2.21582
Available balance: 0 Lovelaces
...

The memory usage looks also quite okay:

[rvl]

Looks reasonable so far...

[paweljakubas]

Tons of name changing (very good ones like entropyToByteString -> entropyToBytes, using put, read rathaer than implementation suggesting enqueue, dequeue), relocating stuff (like wallet types from Cardano.WalletLayer to Cardano.Wallet) and a number of more precision types application : like using ScrubbedBytes rather than ByteString in generation key functions. I am especially fond of introducing of GetArg class.

Still, do not understand why we forbid using more than one block per tick ... All "gaps" are going to be tackled elsewhere?

[Anviking]

🤔 Why not getArg and getAllArgs?

Side-note, previously I thought about (and wanted) to write the cli code like lift decode <$> getArg option

[KtorZ]

Actually. I have been perhaps a bit too far. Having two functions would work as well. Once the Decodable instance have been adjusted, we could rely on that and have two getArg and getAllArgs functions.