what's Block Assembly Marketplace (BAM)?

BAM is a decentralized transaction scheduling protocol for Solana, reimagining block construction through a network of specialized BAM Nodes and validators. Operating within Trusted Execution Environments (TEEs), it enables private transaction ordering where bundles are sourced, prioritized, filtered, and scheduled confidentially until execution. This provides cryptographic attestations for verifiable fairness, enhancing transparency while mitigating extractive MEV practices like sandwiching. The system introduces programmable plugins for custom sequencing logic, powering features such as Application-Controlled Execution (ACE) for app-specific rules (e.g., cancel-before-take in order books). Validators execute pre-ordered transactions via modified clients, distributing block-building responsibilities and unlocking new fee-sharing models from plugins. BAM advances Solana toward proposer-builder separation, improving efficiency, auditability, and innovation in high-throughput environments.

BAM is part of Solana's roadmap, redesigning transaction ordering for fair MEV distribution.