Transaction signing is something that happens in a lot of places - this
PR introduces primitives for transaction signing in `transaction_utils`
such that we can use the same logic across web3/eth1/etc for this simple
operation.
`transaction_utils` also contains a few more "spec-derived" helpers for
working with transactions, such as the computation of a contract address
etc that cannot easily be introduced in `transactions` itself without
bringing in dependencies like secp and rlp, so they end up in a separate
module.
Finally, since these modules collect "versions" of these transaction
types across different eips, some tests are moved to follow the same
structure.
Since these types were written, we've gained an executable spec:
https://github.com/ethereum/execution-specs
This PR aligns some of the types we use with this spec to simplify
comparisons and cross-referencing.
Using a `distinct` type is a tradeoff between nim ergonomics, type
safety and the ability to work around nim quirks and stdlib weaknesses.
In particular, it allows us to overload common functions such as `hash`
with correct and performant versions as well as maintain control over
string conversions etc at the cost of a little bit of ceremony when
instantiating them.
Apart from distinct byte types, `Hash32`, is introduced in lieu of the
existing `Hash256`, again aligning this commonly used type with the spec
which picks bytes rather than bits in the name.
EIP-4844 blob sidecars are a concept that only exists in the mempool.
After inclusion of a transaction into an execution block, only the
versioned hash within the transaction remains. To improve type safety,
replace the `Transaction.networkPayload` member with a wrapper type
`PooledTransaction` that is used in contexts where blob sidecars exist.
This is more according to the structure of the code itself.
And also, currently some of these tests live under tests/rlp but
some under tests/common. Could use some further re-organisation
within the different tests, but this move is a first step.
Jacek Sieka
andri lim
Etan Kissling
Kim De Mey
Ștefan Talpalaru
Zahary Karadjov