Refactored app out of checkValid #5

Job	Run time
fmt	15s
cargo-deny (advisories)	44s
cackle	1m 40s
cargo-deny (bans licenses sources)	47s
build (gcc, current)	1h 2m 38s
rust-check-git-rev-deps	20s
build (gcc, current, --check-test-tx-meta)	1h 0m 42s
build (gcc, next)	1h 2m 27s
build (gcc, next, --check-test-tx-meta)	1h 0m 50s
build (clang, current)	57m 30s
build (clang, current, --check-test-tx-meta)	46m 40s
build (clang, next)	58m 6s
build (clang, next, --check-test-tx-meta)	46m 3s
complete	1s
	7h 38m 43s

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