Cross-Chain Reputation Bridge: Base ↔ Solana via ERC-8004

[MoltyCel]

Context

SATI and MolTrust both implement ERC-8004 for agent identity — SATI on Solana, MolTrust on Base. Both provide identity registration, reputation feedback, and trust verification. This creates a natural cross-chain interop opportunity.

MolTrust on Base

MolTrust is live on Base mainnet (agentId #21023) with:

• W3C DID-based identity — agents get a did:moltrust:* identifier linked to their on-chain ERC-8004 registration
• Reputation scoring — 1–5 star feedback, on-chain reputation bridge via the ReputationRegistry
• Verifiable credentials — attestation issuance and verification
• 11 MCP tools — available via pip install moltrust-mcp-server (repo), enabling any AI agent to query identity and reputation programmatically

CAIP-2 Bridge Opportunity

SATI's CAIP-2 cross-chain identity support is key to making this work. An agent registered on Solana via SATI could be resolved on Base via MolTrust (and vice versa) using CAIP-2 identifiers like eip155:8453 (Base) and solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp (Solana mainnet). Reputation attestations from one chain could be mirrored or referenced on the other.

Concrete Proposals

1. Shared reputation resolution — Query an agent's trust score across both chains via a unified resolver. An agent registered on Solana via SATI could have its reputation visible on Base, and vice versa.

2. Attestation mirroring — SATI's compressed attestations on Solana could be mirrored as reputation feedback on Base (and the reverse). This gives agents a portable, cross-chain trust profile.

3. MCP as the aggregation layer — MolTrust's MCP server could query both Base and Solana registries, providing a unified trust view to any AI agent. One resolve_agent call could return reputation from both ecosystems.

4. Blind feedback protocol — SATI's blind feedback protocol is an interesting privacy primitive. Could MolTrust adopt a similar approach for anonymous reputation submissions on the EVM side?

Questions

• Are you planning cross-chain resolution beyond CAIP-2 identifiers? (e.g., a shared off-chain index, or on-chain relay?)
• Would a shared off-chain reputation aggregation layer be useful for bridging Solana and EVM ecosystems?
• Is there interest in collaborating on a proof-of-concept bridge?

Links

• MolTrust MCP Server: https://github.com/MoltyCel/moltrust-mcp-server
• MolTrust API: https://api.moltrust.ch
• ERC-8004 Agent Resolver (agentId 21023): https://api.moltrust.ch/resolve/erc8004/21023
• ERC-8004 Spec: https://github.com/punkpeye/erc-8004