Rename the `tx` field of additions as `txs`

[LLFourn]

          Nits: Maybe rename the `tx` field of additions as `txs`. Also, maybe rename the `txout` field as `txouts`.

Originally posted by @vladimirfomene in #926 (comment)

[Shourya742]

May I work on this issue? Can you please assign this to me?

[vladimirfomene]

@Shourya742 you can go ahead and work on it. You can create a PR on top of #926 that fixes that issue.

[vladimirfomene]

I'm closing this. @Shourya742 changes were added to #976