Fix(wallet-contract): Always end with a callabck to unlock the contract #1

Job	Run time
Cargo Audit	19s
Cargo Deny	33s
Cargo Clippy	1s
Cargo Nextest (Linux)	1s
Cargo Fmt	20s
Cargo Nextest (Linux Nightly)	1s
Non-default Configuration Builds	1m 14s
Themis	38s
Cargo Nextest (MacOS)	12m 7s
Unused Dependencies	1s
Rust Doctests	1s
Lychee Lints	12s
Protobuf Backward Compatibility	9s
Protocol Schema	14m 11s
Backward Compatibility	1s
Database Migration	1s
Genesis Changes	1s
Sanity Checks	1s
Style	43s
Upgradability	1s
Windows check for building public libraries	4m 57s
Generate Coverage Artifact	0s
Upload Coverage	0s
	35m 33s

Provide feedback