Add a `GetTxStatus` trait in `blockchain`.#697

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tnull wants to merge 5 commits intobitcoindevkit:masterfrom

tnull:2022-08-trait-gettxstatus

Commits on Aug 2, 2022

Add and implement `GetTxStatus` trait
tnull
committed

Commits on Aug 4, 2022

Commits on Aug 5, 2022

Clean up interface, re-use `TxStatus` struct
tnull
committed