Arcis Protocol — Core Contracts

Smart contracts powering financial infrastructure for autonomous AI agents. Deployed on Base.

Contracts

Core

Contract	Description
ArcisVault	ERC-4626 yield-bearing vault. USDC → raUSDC shares. Multi-strategy allocation.
AgentCredit	Identity-aware credit lines. ERC-8004 reputation tiers. Utilization-based rate oracle.
RevenueBondFactory	Revenue bond issuance, purchase, coupon distribution, maturity redemption.
StrategyAllocator	Timelocked strategy weight management with drift detection.

Periphery

Contract	Description
ATIRouter	Single entry point: deposit, borrow, depositAndBorrow in one call.
BaseStrategy	Abstract strategy adapter with vault-only access control.
StrategyAave	Aave V3 USDC lending strategy.
StrategyMorpho	Morpho optimized lending strategy.
StrategyOndoUSDY	Ondo USDY tokenized treasury yield strategy.

Libraries

Library	Description
MathLib	Fixed-point math, share/asset conversions, virtual offset inflation protection.
ErrorLib	All custom errors — zero require() across the protocol.

Tokens

Token	Description
BondToken	ERC-20 bond receipt tokens minted per bond issuance.

Security Features

Feature	Description
Emergency withdrawal	emergencyWithdraw() works even when vault is paused (reserve-only)
Strategy timelock	24-hour delay on strategy additions (queue → execute → cancel)
Withdrawal fee ramp	0.1% fee on withdrawals within 24h of deposit (flash loan protection)
Per-agent deposit caps	perAgentCap enforced alongside global depositCap
Rate oracle	Utilization-based interest curve (base + slope1 below optimal + slope2 jump)
ERC-4626 compatibility	Full view functions: convertToShares/Assets, maxWithdraw/Redeem, preview*
Inflation protection	Virtual shares/assets offset prevents first-depositor attacks
Reentrancy guards	nonReentrant on all state-changing functions
Custom errors	Zero require() — all custom errors for gas efficiency
Pausable	Owner can pause deposits/withdrawals; emergency withdraw still works
Two-step ownership	transferOwnership + acceptOwnership pattern

Tests

116/116 passing across 6 test suites:

Suite	Tests	Coverage
ArcisVault	27	Deposit, withdraw, shares, strategies, fees, pause, ownership
AgentCredit	11	Borrow, repay, tiers, interest, collateral, liquidation
RevenueBondFactory	20	Issue, purchase, service debt, coupon, redeem, default
SecurityAudit	32	Access control, reentrancy, inflation, invariants, edge cases
ATIRouter	15	Deposit, borrow, depositAndBorrow, position queries
StrategyAllocator	11	Queue, execute, cancel, drift, timelock, ownership

Subgraph

The subgraph/ directory contains a ready-to-deploy subgraph for The Graph:

• schema.graphql — Deposit, Withdrawal, Harvest, Loan, VaultSnapshot, ProtocolStats
• src/vault.ts — Vault event handlers
• src/credit.ts — Credit event handlers

Deployed (Base Sepolia)

Contract	Address
ArcisVault (raUSDC)	0xa8eF658E125C7f6D7aFa9B6b8035b66b32CBE98d
AgentCredit	0x019540E33a0292a9DDE36bD9Ef11774d5A1Ce6FC
ATIRouter	0x0281e7D37683c585325004F84e0b94170c78d5B4
StrategyAllocator	0x9f101e1159AA530dC5Cb104decB32aBA1eAF2617

Related Repos

Repo	Description
sdk	@arcisprotocol/sdk — TypeScript SDK
mcp	@arcisprotocol/mcp — MCP server for AI agents
custos	CUSTOS — autonomous keeper agent
app	arcis.money — landing + dashboard
docs	ATI v1.1, integration guide, SDK examples

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ARCIS · Solidity 0.8.24 · Foundry · Base · MMXXVI