fix(anvil): TypedTransaction rlp decode, bump k256

[DaniPopes]

Motivation

RLP decoding is incomplete: rlp.data() decodes a header and returns the next header.num bytes, but this is always 0 if the raw rlp data already starts with a tx type

See also Reth impl and docs https://github.com/paradigmxyz/reth/blob/0b46e16dcdc9012810726bee410047fea8be7cf9/crates/primitives/src/transaction/mod.rs#L1317C1-L1347C2

Solution

[mattsse]

gg boss
dbg nits

[mattsse]

still need to get used to this -.-

[mattsse]

possible that this is broken due to

foundry/crates/anvil/src/eth/api.rs

Lines 879 to 887 in 5692c5c

	// the [TypedTransaction] requires a valid rlp input,
	// but EIP-1559 prepends a version byte, so we need to encode the data first to get a
	// valid rlp and then rlp decode impl of `TypedTransaction` will remove and check the
	// version byte
	let extend = rlp::encode(&data);
	let tx = match rlp::decode::<TypedTransaction>(&extend[..]) {
	Ok(transaction) => transaction,
	Err(_) => return Err(BlockchainError::FailedToDecodeSignedTransaction),
	};

I guess we no longer need to ensure the input is rlp now that we don't decode the header