There was an issue with micro-eth-signer that has been fixed here: https://github.com/paulmillr/micro-eth-signer/releases/tag/0.12.2

Specifically it didn't allow a zero address when deploying a contract. Even with the fix micro-eth-signer, it doesn't support sending a transaction to the null address without data. As this is likely a user error we should throw in that situation.

TODO

• Update to the fixed version of micro-eth-signer
• Add tests to cover previous bug
• Add a guard and tests to cover the case where the transaction address is null without data