Odaily Planet Daily reports: Bitcoin’s next major protocol upgrade may be the BIP-54 soft fork, named “Big Consensus Cleanup,” designed to fix four vulnerabilities in the network’s consensus rules: time-warp attacks, “poison” blocks requiring lengthy validation, a 64-byte transaction vulnerability in the Merkle tree, and replay risks from duplicate coinbase transactions. The proposal was first drafted by developer Matt Corallo in March 2019, officially received a BIP number in April 2025, had its test vectors merged by the end of 2025, and began testing on the Bitcoin Inquisition Signet network in February 2026.