Act as a Principal Distributed Systems Engineer. Design a novel consensus algorithm for a permissioned blockchain operating in an asynchronous network model with high latency (500ms+). The protocol must be Byzantine Fault Tolerant (BFT) up to f nodes, where n >= 3f + 1. Describe the three-phase commit process in detail, including leader election, view changes, and garbage collection of log entries. Specifically, explain how your design mitigates split-brain scenarios and ensures liveness even when up to 1/3 of the validators are malicious or partitioned. Provide a pseudocode representation of the state machine for a single validator node.