Governance

Seam: verifying Zcash headers on Base with EIP-152, and proving shielded payments without linking the chains

Read full article at source ↗

Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 11/11/2026, 20:58:26 UTC.

Briefings

A Zcash light client named Seam verifies headers on Base using Equihash and EIP-152, allowing shielded payments without trusting bridges. A relay deployed on 29 October 2026 followed NU7 activation without redeploy, processing ~3,456 headers (~2.2e9 gas/day) at ~0.01 ETH/day. A RISC Zero proof proved a shielded payment in 81s on a rented RTX 4090 for ~1 cent, but testnet results are unaudited.

Key points

• Seam uses Equihash (200, 9) and EIP-152 BLAKE2b precompile to verify Zcash headers on Base, enabling shielded payments without trusting bridges.
• A relay deployed on 29 October 2026 followed Zcash NU7 activation (height 3,543,405) without redeploy, processing ~3,456 headers (~2.2e9 gas/day) at ~0.01 ETH/day.

Context

Seam is a Zcash light client for EVM chains on Base, verifying headers via Equihash and EIP-152. It allows shielded payments without trusting bridges, committees, or relays. The relay deployed on 29 October 2026 followed NU7 activation without redeploy, processing ~3,456 headers (~2.2e9 gas/day) at ~0.01 ETH/day. Testnet results are unaudited.

Limitations

Testnet payment verification was performed on a rented RTX 4090 in 81s; results are unaudited. The relay followed NU7 activation without redeploy, but the specific relay deployment details and its exact operational timeline are not fully documented in the source.

Generated by Bittrees-hosted qwen35-2b sha256:aaf42c8b7c3c on 11/11/2026, 21:07:45 UTC. Based on publisher-provided feed evidence; may not cover the full original article. Check the source for details.

View archived briefing on IPFS
bafybeiezygdug3pt63xvqwllimtqfouu62dt4fxurr2f5sva6mmd6okjby