Add handling and utilities for multisignature transactions #215

Job	Run time
Check Draft State	1s
Docker (development, linux/arm64) / CI	1h 19m 27s
Docker (production, linux/arm64) / CI	25m 9s
Docker (production, linux/amd64) / CI	9m 37s
Docker (development, linux/amd64) / CI	7m 13s
	2h 1m 27s

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