rpc, ethclient: cater 'finalized' and 'safe' blocks in ethclient (v0.3.x) #523
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This PR cherry picks commits from #517 PR which was done for v0.2.18-candidate.
This PR adds new block type for "finalized and "safe" blocks to honour the post-merge API modifications.
The purpose behind this change is to consume this client in heimdall for L1 communication i.e. ethereum mainnet and goerli test network which are already following these notions.
Reference implementation from geth: ethereum/go-ethereum#24282, ethereum/go-ethereum#25165, ethereum/go-ethereum#25580.
NOTE: This by no means adds/serves "finalized" or "safe" blocks from bor.