Support showing unsigned txns with oasis-node consensus show_tx CLI command

[tjanez]

SUMMARY

Currently, if one has an unsigned transaction, he can't see its contents using oasis-node consensus show_tx command.

Here is an example error:

$ oasis-node consensus show_tx -g ~/Oasis/Mainnet/genesis.json --transaction.file runtime-register-unsigned.tx
ts=2022-07-19T09:44:00.244390702Z level=error module=cmd/consensus caller=consensus.go:89 msg="failed to parse serialized transaction" err="invalid character '¤' looking for beginning of value"

It would be useful to extend oasis-node consensus show_tx CLI command to be also able to pretty print the contents of unsigned transactions.

ISSUE TYPE

• Feature Idea