feat(protocol): Batch #721

Job	Run time
doctest	56s
wasm-unknown	36s
docs	40s
clippy	43s
feature-checks	1m 48s
fmt	14s
no-std	43s
test stable --no-default-features	55s
wasm-wasi	36s
cfg-check	25s
test stable	52s
test stable --all-features	1m 9s
feature-powerset	1m 48s
test nightly --no-default-features	1m 0s
test nightly	56s
test nightly --all-features	1m 12s
test 1.81 --no-default-features	33s
test 1.81	46s
	15m 52s

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