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Algorand Specifications

The pseudocode below outlines how a Full Node is gracefully shut down.

This process ensures all services are stopped, garbage collection is performed, resources are released, and the internal state is properly cleaned up.

By following this structured approach, the node avoids corrupting data or leaving the Algorand network in an inconsistent state, which is critical for maintaining the integrity of the system.

Algorithm 3: Full Node Shutdown
1: function FullNode.Stop()
2: Network Cleanup
3: node.Network.StopHandlers()
4: node.Network.StopValidatorHandlers()
5: if ¬node.nodeConfig.StopNetwork then
6: node.Network.Stop()
7: endif
8: Service Shutdown
9: if ∃node.CatchpointCatchupService then
10: node.CatchpointCatchupService.Stop()
11: else
12: Full Node Services
13: node.StopAllServices()
14: endif
15: Resource Cleanup
16: node.TxPool.Stop()
17: Final Cleanup
18: node.Ledger.Close()
19: Post-Shutdown Cleanup
20: WaitMonitoringRoutines()
21: node.AccountManager.Registry.Close()
22: for Handler∈node.DatabaseHandlers do
23: Handler.Close()
24: endfor
25: endfunction

Important
IMPLEMENTATION:
Full node shutdown reference implementation.

This structured shutdown process helps ensure that Full Nodes exit cleanly, preserving correctness, avoiding data leaks, and minimizing node and network risk.