Generate_only should create txs without requiring a local key nor password

[faboweb]

Summary

Creating txs by POST /....?generate_only=true should not require a local key nor password. This prevents the usage of this feature in the context of creating txs to be signed by some other mechanism.

Proposal:

If the generate_only parameter is set in queries. The base_req can contain either a name or sender_address. Same goes for the CLI. This would be non breaking.

Problem Definition

Proposal

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[faboweb]

This is almost implemented on develop. Only certain validation needs to be disabled in the generate_only case it seems.

[alexanderbez]

To be clear, gen only already does not require a password (obviously) for the CLI and should also hold true for REST (but I'll make sure in #3396). However, you will still need the account loaded in Keybase. You can do so by gaiacli keys add --pubkey=<some-other-pubkey>.

[faboweb]

However, you will still need the account loaded in Keybase. You can do so by gaiacli keys add --pubkey=.

No the account shouldn't be required. The usecase is running stargate remote where you don't want to store any account. My proposal in the PR I opened is adding a property from to base_req that holds the from address.

[alexanderbez]

You're right @faboweb -- I'll address this.