* eth-sign: initial implementation
* sighash: pre-refactor
* sighash: refactor, all old tests pass
* sighash: test ovmsigner code paths for eip155 and eth_sign
* sighash: tx serialization tests
* sighash: refactor to sign bytes
* common/varbytes: use varbytes serialization from btcd
* transactionmeta: implement and test
* rawdb: add new index
* types/transaction: use txmeta
* blockchain: index tx meta on new block
* rpc: fix sendrawethsigntransaction docstring
* meta test: remove dead code
* ethapi: clean up comment
* lint: fix
* txmeta: clean up compares
* ethapi: remove rlp tag
* signer: remove rlp encoding tags from struct
* types: use factory pattern for getting sighash type
* sighash: migrate to using const
* tx pool: use ovmsigner for tx validation
* tx signing: fix eth_sign serialization
* sighash: new version
* sighash: commit to chainid
* sighash: bugfixes
* core/types: prevent panic on tx sort
* core/types: rename to transaction_meta
* core/blockchain: index txmeta
* sighash: no native value
* ethapi: use ovm signer
* sighash: move chainid
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