Seam: verifying Zcash headers on Base with EIP-152, and proving shielded payments without linking the chains
In briefSeam: a trustless Zcash header checker on Base, plus private payment proofs
SummaryThis forum post presents Seam, a contract on Base that verifies every Zcash block header against Zcash's consensus rules, including the Equihash solution, difficulty adjustment, time rules and cumulative work. Contracts can then read Zcash's best chain without relying on a bridge, committee or relayer. The post also describes building zero-knowledge proofs on top of this relay that show a shielded payment's amount and recipient without exposing transaction details to the EVM chain.