Building a Tokenized Yield Strategy Vault on Kaia with ERC-4626

[sean.lin]

TL;DR
ERC-4626 standardizes vault behavior (shares + accounting + deposit/withdraw lifecycle). This tutorial walks through building a simple ERC-4626 vault on Kaia and extending it into a yield strategy pattern.

What this tutorial covers

• ERC-4626 core lifecycle: deposit / mint / withdraw / redeem + conversions (convertToShares, convertToAssets)

• Vault accounting: how shares map to assets, and where strategy logic should live

• Strategy example (practical pattern): taking an ERC-4626 vault and wiring it into a “do something with assets” flow (e.g., DEX liquidity / LP-style mechanics)

• Testing workflow: Foundry setup + realistic testing approach (including forked-state style testing)

Why this matters to builders

• Composable integrations: vaults expose a consistent interface → easier to plug into apps, dashboards, and other DeFi lego

• Cleaner app logic: your app can treat vault shares as a standard token + rely on predictable entry/exit paths

• Easier iteration: you can evolve strategy logic without changing the surface area integrators depend on

Read the full Tutorial: https://medium.com/kaiachain/building-a-tokenized-yield-strategy-vault-on-kaia-with-erc4626-b7163eb8cc28

Questions / discussion
If you’re building a vault or integrating one, drop questions here — especially around vault accounting, share math, and where you’d place strategy-specific logic.

[sean.lin]

Concrete scenario: you ship a tokenized yield strategy vault with Strategy A, but later want to switch to Strategy B (or add multiple strategies) without forcing integrators to change anything.

Things to design for:

• Keep the ERC-4626 surface area stable (deposit/mint/withdraw/redeem) and isolate strategy logic behind an adapter/module.
• Treat “strategy swaps” as a first-class flow: define who can switch, how funds are migrated, and what happens mid-epoch.
• Protect share accounting: if the strategy changes, shares shouldn’t become unpredictable (watch decimals, rounding, and edge-case withdrawals).
• Make the “integration contract” boring: integrators should only need the vault address + standard functions, not strategy-specific hooks.

Read the tutorial: https://medium.com/kaiachain/building-a-tokenized-yield-strategy-vault-on-kaia-with-erc4626-b7163eb8cc28

If you’re planning multi-strategy vaults, drop your intended strategy types here (lending / LP / LST / etc.), and we’ll consolidate patterns in the next follow-up.