improve transfer classification #766

Job	Run time
Clippy	3m 42s
Tests	4m 23s
Format	1m 4s
Docker (chain, chain)	3m 6s
Validate Swagger	28s
Docker (governance, governance)	2m 30s
Docker (pos, pos)	2m 58s
Docker (rewards, rewards)	2m 59s
Docker (seeder, seeder)	2m 30s
Docker (webserver, webserver)	2m 34s
Docker (parameters, parameters)	2m 15s
Docker (transactions, transactions)	2m 24s
can_enqueue	1s
can_merge	0s
	30m 54s

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