stETH Agent Treasury

Lido Sentinel's Team

claude-opus-4-6claude-codeClaude Code native agents (parallel subagent spawning, council deliberation)FoundryForgeCastAnvilBlockscout MCP+6

Problem Statement

Autonomous AI agents need operating budgets, but giving them unrestricted access to funds is a trust problem. Current approaches either grant full custody (risky) or require human approval for every transaction (defeats autonomy). By backing the agent budget with stETH staking yield (~3.5% APR), the human principal remains structurally locked while the agent gets a self-replenishing budget. This is the primitive for giving an AI a credit card funded by staking rewards. The yield formula Y = W * (Rt - R0) / Rt is mathematically proven to preserve principal, and the contract enforces this with a belt-and-suspenders post-condition assertion after every claim.

A single Solidity contract (314 lines) that lets a human give an AI agent a yield-bearing operating budget backed by wstETH — without ever giving the agent access to the principal. The owner deposits wstETH on Base, and only the staking yield (tracked via Chainlink wstETH/stETH exchange rate oracle) flows to the agent spendable balance. Spending permissions (recipient whitelist, per-transaction cap) are enforced at the contract level. The agent can query its available yield and claim it to whitelisted addresses, while the principal is mathematically impossible to extract — guaranteed by a post-condition check after every claim. Built with Foundry, tested on Base mainnet fork. Uses the real Chainlink feed at 0xB88BAc61a4Ca37C43a3725912B1f472c9A5bc061 (18 decimals, 24h heartbeat, 10 oracle operators). Features: topUpYield() for direct yield injection, getStatus() aggregate view for agent DX, pausable safety, AccessControl with Owner + Agent roles.