Cleanup blockexchange blockAddress handling #4158

Job	Run time
matrix	17s
coverage	18m 6s
build / linux-unittest-amd64-pinned	16m 54s
build / linux-contract-amd64-pinned	10m 31s
build / linux-integration-amd64-pinned	1h 8m 39s
build / linux-tools-amd64-pinned	11m 5s
build / macos-unittest-amd64-pinned	21m 13s
build / macos-contract-amd64-pinned	12m 18s
build / macos-integration-amd64-pinned	1h 22m 30s
build / macos-tools-amd64-pinned	14m 40s
build / windows-unittest-amd64-pinned	33m 56s
build / windows-contract-amd64-pinned	20m 51s
build / windows-integration-amd64-pinned	1h 27m 26s
build / windows-tools-amd64-pinned	23m 35s
build / status	1s
	7h 2m 2s

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