Developer Overview

Multyr is a non-custodial yield aggregation protocol built for multichain deployment (starting with Arbitrum). The core primitive is CoreVault, an ERC-4626 tokenized vault that accepts USDC deposits, routes capital across lending markets (Aave V3, Euler, Morpho, Compound), and returns yield to depositors as share-price appreciation.

This section provides the technical reference needed to integrate with, build on, or query the protocol.

What You Can Do

Role	Entry Point
Depositor / protocol integration	Call deposit(), withdraw(), redeem() on CoreVault via the standard ERC-4626 interface
Frontend / dashboard	Read vault state (totalAssets(), convertToShares(), share price) and render NAV, APY, allocation breakdown
Keeper / automation	Trigger harvest and rebalance flows through StrategyRouter (Chainlink Automation compatible)
Analyst / indexer	Subscribe to on-chain events or query the Multyr subgraph for historical position and fee data

Architecture at a Glance

User (USDC) ──► CoreVault (ERC-4626)
                    │
                    ├── BufferManager   (idle-buffer policy)
                    ├── StrategyRouter  (allocation engine)
                    │       ├── AaveV3Adapter
                    │       ├── EulerAdapter
                    │       ├── MorphoAdapter
                    │       └── CompoundAdapter
                    ├── FeeCollector    (performance / management fees)
                    ├── OpsCollector    (operational cost accounting)
                    ├── RewardsVault    (reward distribution)
                    ├── Incentives      (depositor incentive programs)
                    ├── PriceOracleMiddleware
                    ├── GlobalConfig    (protocol-wide parameters)
                    └── SystemSealer    (immutability lock)

For a full architecture walkthrough, see the Protocol Overview section.

Tech Stack

• Language: Solidity 0.8.x
• Framework: Foundry (forge, cast, anvil)
• Libraries: OpenZeppelin Contracts (ERC-4626, access control, reentrancy guards)
• Chains: Arbitrum One (live), with Base, Optimism, Ethereum, and others planned
• Asset: USDC (native bridged)
• Indexing: The Graph (subgraph)

Section Contents

Page	Description
Addresses & Deployments	Deployed contract addresses per chain
Smart Contracts	Contract reference: functions, modules, adapter interface
Events & Indexing	Emitted events and subgraph queries
Integration Guides	Step-by-step patterns for depositors, frontends, keepers

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Document version: 1.1 Last updated: 2026-03-29