This pull request introduces several updates to the core/state and tomox/tradingstate packages, focusing on enhancing the Commit method to return an additional integer value representing the number of committed nodes. Additionally, it includes various code refactorings and improvements to metrics tracking.

Updates to core/state package:

• Enhanced Commit method: Modified the Commit method in multiple files to return an additional integer value indicating the number of committed nodes. (core/state/database.go, core/state/state_object.go, core/state/statedb.go, light/postprocess.go, light/trie.go) [1] [2] [3] Ff568cf3L175R175, [4]
• Metrics tracking: Introduced new metrics to track account and storage updates, deletions, and commits. (core/state/metrics.go, core/state/state_object.go, core/state/statedb.go) [1] [2] [3]

	accountUpdatedMeter   = metrics.NewRegisteredMeter("state/update/account", nil)
	storageUpdatedMeter   = metrics.NewRegisteredMeter("state/update/storage", nil)
	accountDeletedMeter   = metrics.NewRegisteredMeter("state/delete/account", nil)
	storageDeletedMeter   = metrics.NewRegisteredMeter("state/delete/storage", nil)
	accountCommittedMeter = metrics.NewRegisteredMeter("state/commit/account", nil)
	storageCommittedMeter = metrics.NewRegisteredMeter("state/commit/storage", nil)

# TYPE state_update_account gauge
state_update_account 7298

# TYPE state_update_storage gauge
state_update_storage 4004

# TYPE state_delete_account gauge
state_delete_account 2156

# TYPE state_delete_storage gauge
state_delete_storage 0

# TYPE state_commit_account gauge
state_commit_account 2405

# TYPE state_commit_storage gauge
state_commit_storage 10262

Updates to tomox/tradingstate package:

• Enhanced Commit method: Updated the Commit method across various files to return an additional integer value for the number of committed nodes. (tomox/tradingstate/database.go, tomox/tradingstate/state_lendingbook.go, tomox/tradingstate/state_liquidationprice.go, tomox/tradingstate/state_orderList.go, tomox/tradingstate/state_orderbook.go, tomox/tradingstate/statedb.go, tomox/tradingstate/tomox_trie.go) [1] [2] [3] [4] [5] [6] [7]
• Code refactoring: Improved code readability by reordering imports and adjusting comments. (tomox/tradingstate/state_lendingbook.go, tomox/tradingstate/state_liquidationprice.go, tomox/tradingstate/state_itemList.go, tomoxlending/lendingstate/state_lendingbook.go) [1] [2] [3] [4]

These changes collectively improve the functionality and maintainability of the codebase by providing more detailed commit information and enhancing metrics tracking.

Reference:

• core, light, tests, trie: add state metrics ethereum/go-ethereum#23433