# ➤ Developers

You're building something that touches ETH Strategy — displaying STRAT in a wallet, integrating esETH into a DEX, building on the bonding mechanism, or querying protocol state for a dashboard. This guide points you to the right resources.

## Quick Reference

| Token          | Standard | Key Integration Note                                                                                        |
| -------------- | -------- | ----------------------------------------------------------------------------------------------------------- |
| **STRAT**      | ERC-20   | Standard ERC-20. No inflation schedule — only minted through note conversion.                               |
| **sSTRAT-v2**  | ERC-20   | **Non-transferable.** `transfer()` and `approve()` revert with `TransferDisabled`. Display-only.            |
| **esETH**      | ERC-20   | Non-rebasing. Balances never change except on transfer/mint/burn. Safe to cache. Supports ERC-2612 permits. |
| **CDT**        | ERC-20   | Each token = \~$1 protocol debt. `totalSupply()` = total protocol debt. Supports ERC-2612 permits.          |
| **Option NFT** | ERC-721  | Conversion rights. Requires CDT to exercise. Partial exercise supported.                                    |
| **ESPN**       | ERC-4626 | Standard vault interface. Deposit USDS, receive shares.                                                     |

## Primary Resources

### Integration Guide

The [Developer Integration Guide](https://docs.ethstrat.xyz/developers/integration-guide) is your main reference. It covers:

* Solidity interfaces for every token
* Recommended integration patterns (with opinionated guidance on what works best)
* Production caveats and common pitfalls
* Working ethers.js code examples
* An end-to-end quickstart

### Contract Addresses

All deployed contract addresses: [Contracts](https://docs.ethstrat.xyz/references/contracts)

### AI Agents

Building an autonomous agent that queries or interacts with ETH Strategy? The [AI Agents](https://docs.ethstrat.xyz/developers/ai-agents) page provides function selectors for direct RPC calls, typed protocol state schemas, machine-readable token metadata in JSON, safety rules for transaction agents, and derived metric formulas.

### Machine-Readable Docs

The [llms.txt](https://github.com/ethstrat/public-docs/blob/main/llms.txt) file provides a machine-readable protocol overview for AI assistants and automated tools. See [LLMs.txt](https://docs.ethstrat.xyz/references/llms) for details.

## Key Integration Patterns

**esETH is the easy one.** Non-rebasing, standard ERC-20, supports permits. If you've integrated wstETH or rETH, esETH works the same way. Store and operate on balances directly — no rebase edge cases.

**sSTRAT-v2 is display-only.** Transfers revert. Show it in wallet UIs as a staked balance indicator, but do not attempt to transfer, pool, or use it as collateral.

**CDT is a standard ERC-20 with economic meaning.** Each CDT = \~$1 of protocol debt. `totalSupply()` gives you real-time protocol leverage. Useful for dashboards and risk monitoring.

**NFT Options require CDT to exercise.** If you're building an NFT marketplace integration, note that the NFT alone is not self-contained — the holder also needs CDT to convert.

## Your Reading Path

1. [Developer Integration Guide](https://docs.ethstrat.xyz/developers/integration-guide) — interfaces, patterns, code examples
2. [Contract Reference](https://docs.ethstrat.xyz/developers/contract-reference) — full API reference for every function
3. [AI Agents](https://docs.ethstrat.xyz/developers/ai-agents) — structured data for autonomous agents
4. [Protocol Overview](https://docs.ethstrat.xyz/introduction/protocol-overview) — how the pieces fit together
5. [Contracts](https://docs.ethstrat.xyz/references/contracts) — deployed addresses
6. [Risks](https://docs.ethstrat.xyz/security-and-risk/risks) — security considerations