Enable Seamless Messaging Across Chains with Crosschain Broadcaster

Crosschain Broadcaster Standard enables trustless, upgradeable messaging across EVM-compatible chains like Arbitrum One and Base. It uses onchain storage proofs and BlockHashProver contracts to verify messages without third-party trust. Intents-based bridging workflows benefit by replacing slow or offchain verification with this standardized approach. Authors Allan, Henry, and Chris designed it to unify rollup communication while avoiding fragmentation.