MeridianVault is now a Coordinator contract!

[collinsezedike]

The Meridian coordinator vault is live, and it's a different architecture from what was there before: protocol-agnostic by design, not tied to Blend or DeFindex specifically.

Deposits now go through MeridianVault, a coordinator contract that holds no opinion about where funds actually earn yield. It delegates to a swappable adapter (BlendAdapter today, DefindexAdapter built and ready for its first live vault) that does the protocol-specific work. Which protocol a vault routes to is on-chain state, vault.get_adapter(), changeable via an admin-only set_adapter call, no vault redeploy required (#329).

Self-updating rate discovery. Each adapter exposes get_pool() and get_protocol(), so the frontend discovers live rate data by walking vault.get_adapter() → adapter.get_pool()/get_protocol() rather than tracking pool addresses in config. If the adapter is ever swapped, the app picks up the new pool automatically on the next fetch (#357).

Live yield. BlendAdapter.accrue() refreshes the vault's cached position value from Blend's own reserve data (#356). It shipped with a real bug, caught and fixed same-day: the divisor was wrong, and it briefly inflated a test position's displayed value by ~100,000x. No funds were ever at risk, only a cached display number, and it's fixed and redeployed now (#366, #367) with a regression test that reproduces the exact corruption against the old code.

What came with it:

• TVL and position values now refresh immediately after a deposit or withdrawal, instead of serving a stale cached response for up to 5 minutes (fix(web): refresh vaults query cache after deposit and withdraw #359)
• Trustlines are established proactively and silently before a deposit, instead of failing first and asking you to notice a separate button (feat(web): proactively establish trustlines before deposit #362)
• An error boundary and a proper retry state when position data fails to load, deposit/withdraw stay usable either way (feat(web): add error boundary and position-load error state #365)
• Full unit test coverage for both adapter contracts, including the auth guards and the DeFindex amounts.get(0) edge case (test: add unit tests for Blend and DeFindex adapter contracts #363), and for the SDK's transaction-building layer, coordinator.ts had zero coverage before this (test: add unit tests for the SDK transaction-building layer #364)
• Docs rewritten to match reality: contract interfaces, the two deploy scripts, and the deliberate DEPLOYER/ADMIN key split (docs: rewrite architecture and deployment docs for adapter pattern #361)

If you still have funds in the old vault, deposits made before this migration, here's a previous deployment URL to withdraw.

Back to building.
— Collins