SATI: Solana Agent Trust Infrastructure

Trust infrastructure for million-agent economies on Solana — identity, reputation, and validation designed for continuous feedback at scale.

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Overview

SATI enables agents to establish trust across organizational boundaries without pre-existing relationships. Built on Solana Attestation Service (SAS), SATI is architected for compression-ready reputation — storing complete feedback histories on-chain rather than just averages.

Component	Purpose
SATI Registry	Canonical entry point, atomic registration, collection authority
Token-2022	Agent identity NFTs with metadata and collection membership
SAS	Reputation and validation attestations (compression-ready)

┌─────────────────────────────────────────────────────────────────┐
│                    SATI Registry Program                        │
│           (satiFVb9MDmfR4ZfRedyKPLGLCg3saQ7Wbxtx9AEeeF)         │
├─────────────────────────────────────────────────────────────────┤
│  initialize()              → Create registry + TokenGroup       │
│  register_agent()          → Token-2022 NFT + group membership  │
│  update_registry_authority() → Transfer/renounce control        │
└─────────────────────────────────────────────────────────────────┘
                              │
                              ▼
┌──────────────────────────┐  ┌──────────────────────────────────┐
│      Token-2022          │  │  Solana Attestation Service      │
│  • Identity storage      │  │  • FeedbackAuth schema           │
│  • TokenMetadata         │  │  • Feedback schema               │
│  • TokenGroup            │  │  • FeedbackResponse schema       │
│  • Direct updates/xfers  │  │  • ValidationRequest schema      │
│                          │  │  • ValidationResponse schema     │
│                          │  │  • Certification schema          │
└──────────────────────────┘  └──────────────────────────────────┘

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Why SATI?

Designed for scale. SATI uses Solana Attestation Service for reputation, which means:

• Complete histories, not just averages — Store every feedback on-chain, aggregate algorithmically
• Compression-ready — When SAS ships ZK-compressed attestations, reputation costs drop ~100x
• Sub-second finality — ~400ms today, ~150ms with Alpenglow
• Native wallet support — Agents visible in Phantom, Solflare, Backpack

Capability	Today	With Compression
Feedback cost	~0.002 SOL	~0.00002 SOL
Practical scale	10K feedbacks	1M+ feedbacks
On-chain history	Full	Full

100% ERC-8004 compatible — same registration file format, same functional interfaces, cross-chain agent identity via DIDs.

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Quick Start

# Clone repository
git clone https://github.com/cascade-protocol/sati.git
cd sati

# Install dependencies
pnpm install

# Build program
anchor build

# Build SDK
pnpm --filter @cascade-fyi/sati-sdk build

# Run tests
anchor test

Requirements:

• Rust 1.89.0
• Solana CLI 2.0+
• Anchor 0.32.1+
• Node.js 18+
• pnpm

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SDK Usage

import { SATI } from "@cascade-fyi/sati-sdk";

// Initialize client (auto-loads deployed schema addresses)
const sati = new SATI({ network: "mainnet" }); // or "devnet"

// Register an agent
const { mint, memberNumber } = await sati.registerAgent({
  payer: keypair,
  name: "MyAgent",
  symbol: "SATI",
  uri: "ipfs://QmRegistrationFile",
  additionalMetadata: [
    ["agentWallet", `solana:${keypair.address}`],
    ["a2a", "https://agent.example/.well-known/agent-card.json"],
  ],
});

// Give feedback (uses auto-loaded SAS schemas)
const { attestation } = await sati.giveFeedback({
  payer: keypair,
  agentMint: mint,
  score: 85,
  tag1: "quality",
});

See examples/ for complete usage examples.

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Costs

Registration (one-time, rent is reclaimable):

Operation	Cost (SOL)
Register agent (minimal)	~0.003
Register agent (3 metadata fields)	~0.0035
Register agent (max 10 fields)	~0.005

Reputation (per attestation):

Operation	Today	With Compression
Authorize feedback	~0.002 SOL	~0.00002 SOL
Give feedback	~0.002 SOL	~0.00002 SOL
Validation request	~0.002 SOL	~0.00002 SOL

See benchmarks for detailed CU measurements.

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Scalability Roadmap

SATI's architecture is designed to scale with Solana's infrastructure:

Today: PDA-based attestations via SAS

• Full ERC-8004 compatibility
• Complete on-chain feedback histories
• ~0.002 SOL per attestation

When SAS ships compressed attestations (PR #101):

• ~100x cost reduction for reputation operations
• Million-agent scale becomes practical
• No SATI code changes required — SAS handles compression transparently

Why this matters: Systems constrained by gas costs store only aggregates (averages, counts). SATI stores complete histories, enabling:

• Spam detection via pattern analysis
• Reviewer reputation (weight feedback by reviewer quality)
• Time-decay scoring (recent feedback matters more)
• Payment-verified feedback (x402 proofs)

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ERC-8004 Compatibility

SATI achieves 100% functional compatibility with ERC-8004:

ERC-8004 Feature	SATI Equivalent
registrationFile	Token-2022 uri field (IPFS/HTTP)
transfer()	Native Token-2022 transfer
setApprovalForAll()	Token-2022 delegate
Feedback.request()	SAS FeedbackAuth attestation
Feedback.submit()	SAS Feedback attestation
Collection membership	TokenGroup extension

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Documentation

• Complete Specification - Full technical specification
• TypeScript SDK - Developer SDK with generated client
• Examples - Usage examples

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Security

See SECURITY.md for vulnerability reporting.

Deployment Status: Mainnet and Devnet On-chain Verification: Verified via solana-verify

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Contributing

See CONTRIBUTING.md for guidelines.

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Acknowledgments

Inspired by:

• ERC-8004 (Ethereum Foundation, MetaMask, Google, Coinbase)
• Solana Attestation Service
• Google's Agent-to-Agent (A2A) Protocol
• Anthropic's Model Context Protocol (MCP)

Built on:

• Token-2022 (SPL Token Extensions)
• Anchor Framework
• Solana Attestation Service

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Connect

• Twitter: @opwizardx
• Discussion: GitHub Discussions

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License

Apache License 2.0

Copyright 2025 Cascade Protocol