addressing TODOs

[InoMurko]

mix credo --strict would show:

`
Software Design
┃
┃ [D] → Found a TODO tag in a comment: # TODO: Handle args, make nicer
┃ apps/evm/lib/evm/debugger.ex:327 #(EVM.Debugger.handle_prompt)
┃ [D] → Found a TODO tag in a comment: # TODO: Does this log mess up our
┃ progress tracker?
┃ apps/cli/lib/sync.ex:52 #(CLI.Sync.sync_new_blocks)
┃ [D] → Found a TODO tag in a comment: # TODO: Check we can't extend the ext?
┃ apps/merkle_patricia_tree/lib/merkle_patricia_tree/trie/verifier.ex:87 #(MerklePatriciaTree.Trie.Verifier.verify_node)
┃ [D] → Found a TODO tag in a comment: # TODO: Decide if we want to waste the
┃ cycles to pull
┃ apps/blockchain/lib/blockchain/account.ex:416 #(Blockchain.Account.transfer)
┃ [D] → Found a TODO tag in a comment: # TODO: Implement CMAC
┃ apps/exth_crypto/lib/exth_crypto/mac.ex:36 #(ExthCrypto.MAC.mac)
┃ [D] → Found a TODO tag in a comment: # TODO: SEC1 - §5.1.4 - Steps 2, 3 -
┃ Verify curve
┃ apps/exth_crypto/lib/exth_crypto/ecies.ex:173 #(ExthCrypto.ECIES.decrypt)
┃ [D] → Found a TODO tag in a comment: # TODO: Bulk up these requests?
┃ apps/ex_wire/lib/ex_wire/sync.ex:87 #(ExWire.Sync.handle_info)
┃ [D] → Found a TODO tag in a comment: # TODO: reason?
┃ apps/ex_wire/lib/ex_wire/handshake.ex:316 #(ExWire.Handshake.read_ack_resp)
┃ [D] → Found a TODO tag in a comment: # TODO: We should read the header? But,
┃ it's unused by all clients.
┃ apps/ex_wire/lib/ex_wire/framing/frame.ex:128 #(ExWire.Framing.Frame.unframe)
┃ [D] → Found a TODO tag in a comment: # TODO: Use highest known block as limit?
┃ apps/cli/lib/cli.ex:41 #(CLI.sync)
┃ [D] → Found a TODO tag in a comment: # TODO: Do we have a standard for default
┃ account values
┃ apps/blockchain/lib/blockchain/account.ex:517 #(Blockchain.Account.get_machine_code)
┃ [D] → Found a TODO tag in a comment: # TODO: Deserialize from proper struct
┃ apps/ex_wire/lib/ex_wire/packet/transactions.ex:64 #(ExWire.Packet.Transactions.deserialize)
┃ [D] → Found a TODO tag in a comment: # TODO: Serialize accurately
┃ apps/ex_wire/lib/ex_wire/packet/transactions.ex:44 #(ExWire.Packet.Transactions.serialize)
┃ [D] → Found a TODO tag in a comment: # TODO: We need to follow up on
┃ disconnection packets with disconnection ourselves
┃ apps/ex_wire/lib/ex_wire/packet/status.ex:158 #(ExWire.Packet.Status.handle)
┃ [D] → Found a TODO tag in a comment: # TODO: Track RTT time
┃ apps/ex_wire/lib/ex_wire/packet/pong.ex:59 #(ExWire.Packet.Pong.handle)
┃ [D] → Found a TODO tag in a comment: # TODO: Do something
┃ apps/ex_wire/lib/ex_wire/packet/new_block_hashes.ex:85 #(ExWire.Packet.NewBlockHashes.handle)
┃ [D] → Found a TODO tag in a comment: # TODO: Add a bunch more checks
┃ apps/ex_wire/lib/ex_wire/packet/hello.ex:120 #(ExWire.Packet.Hello.handle)
┃ [D] → Found a TODO tag in a comment: # TODO: Do.
┃ apps/ex_wire/lib/ex_wire/packet/block_headers.ex:79 #(ExWire.Packet.BlockHeaders.handle)
┃ [D] → Found a TODO tag in a comment: # TODO: This is a simple way to determine
┃ who to send the message to,
┃ apps/ex_wire/lib/ex_wire/network.ex:108 #(ExWire.Network.handle)
┃ [D] → Found a TODO tag in a comment: # TODO: 64-bit hash?
┃ apps/evm/lib/block/header.ex:64 #(Block.Header)
┃ [D] → Found a TODO tag in a comment: # TODO: Add real tests here
┃ apps/evm/test/evm/operation/metadata_test.exs:5 #(EVM.Operation.MetadataTest)
┃ [D] → Found a TODO tag in a comment: # TODO: This should be set and stored in
┃ a file

`