Rust

serving chain info, smart copy suffixes #86

Job	Run time
test	1m 12s
build (aarch64-apple-darwin, macos-latest)	1m 38s
build (x86_64-apple-darwin, macos-latest)	1m 56s
build (x86_64-pc-windows-msvc, windows-latest)	3m 15s
build (x86_64-unknown-linux-musl, ubuntu-latest)	1m 58s
	9m 59s

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