> For the complete documentation index, see [llms.txt](https://docs.coti.io/coti-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.coti.io/coti-documentation/privacy-on-avalanche/networks/coti-testnet.md).

# COTI Testnet

COTI Testnet is the **private execution** side of Privacy on Demand. Host-chain dApps on [Avalanche Fuji](/coti-documentation/privacy-on-avalanche/networks/fuji.md) send encrypted work through the cross-chain Inbox; COTI runs the private computation and returns encrypted results.

> **Note:** Addresses below match `pod-ecosystem-integration/deployConfig.json` (Inbox salt `pod.inbox.v2.2`). They may change after contract redeploys. Confirm against that file or your SDK release before production use.

## Network details

| Parameter      | Value                         |
| -------------- | ----------------------------- |
| Network name   | COTI Testnet                  |
| Chain ID       | `7082400`                     |
| Currency       | COTI                          |
| RPC URL        | `https://testnet.coti.io/rpc` |
| WebSocket URL  | `wss://testnet.coti.io/ws`    |
| Block explorer | <https://testnet.cotiscan.io> |
| Status         | <https://uptime.coti.io>      |

Also see the general COTI [TestNet](/coti-documentation/networks/testnet.md) page for MetaMask setup and the [Testnet faucet](/coti-documentation/networks/testnet/faucet.md).

## PoD contracts

| Contract         | Address                                                                                                                        | Description                                                                             |
| ---------------- | ------------------------------------------------------------------------------------------------------------------------------ | --------------------------------------------------------------------------------------- |
| Inbox            | [`0x3b8B70819f27e0438cBcE7f31894f799da52648F`](https://testnet.cotiscan.io/address/0x3b8B70819f27e0438cBcE7f31894f799da52648F) | Cross-chain message router (CREATE3; same address on every PoD chain)                   |
| MPC executor     | [`0x6804961167c3c8ef2bf6839ddcf51ec1fbe800c3`](https://testnet.cotiscan.io/address/0x6804961167c3c8ef2bf6839ddcf51ec1fbe800c3) | Entry point for library-style private operations (`configureCoti` target on host dApps) |
| Price oracle     | [`0xb471e172876ba9bb24a43528779ea31e0b0bda2f`](https://testnet.cotiscan.io/address/0xb471e172876ba9bb24a43528779ea31e0b0bda2f) | Local/remote token prices used by Inbox fee conversion                                  |
| Pod ERC20 mother | [`0xaeb2271959031b65cba63302cff5d970b49d4a7b`](https://testnet.cotiscan.io/address/0xaeb2271959031b65cba63302cff5d970b49d4a7b) | COTI-side registry for **PoD cross-chain** Privacy Portal / pToken flows                |

> **Portal labeling:** The mother / pToken path above is for **PoD cross-chain Privacy Portal** (host chain Fuji ↔ COTI). For the **native COTI Privacy Portal** (PrivateERC20 on COTI only), see [COTI Privacy Portal — contract addresses](/coti-documentation/coti-privacy-portal/developer-guide/contract-addresses.md).

## Protocol helpers (COTI Testnet)

These are not PoD-specific, but most PoD clients need them for account onboarding and chain tooling:

| Contract                  | Address                                                                                                                        |
| ------------------------- | ------------------------------------------------------------------------------------------------------------------------------ |
| AccountOnboard            | [`0x536A67f0cc46513E7d27a370ed1aF9FDcC7A5095`](https://testnet.cotiscan.io/address/0x536A67f0cc46513E7d27a370ed1aF9FDcC7A5095) |
| MPCInterface (precompile) | `0x0000000000000000000000000000000000000064`                                                                                   |

Full COTI Testnet protocol addresses: [Contracts Addresses](/coti-documentation/networks/testnet/contracts-addresses.md).

## How this network fits PoD

| Piece        | Role on COTI Testnet                                                          |
| ------------ | ----------------------------------------------------------------------------- |
| Inbox        | Receives mined requests from host chains and routes callbacks back            |
| MPC executor | Target address host dApps pass to `configureCoti(..., COTI_TESTNET_CHAIN_ID)` |
| Price oracle | Converts fee budgets between host gas units and COTI                          |

Typical pairing for this section:

* **Host:** [Avalanche Fuji C-Chain](/coti-documentation/privacy-on-avalanche/networks/fuji.md) · **Execution:** COTI Testnet (see the [private Adder tutorial](/coti-documentation/privacy-on-avalanche/tutorial-private-adder-fuji.md))

## SDK constants

In `@coti-io/pod-sdk` and `@coti-io/coti-contracts`:

| Constant | Value                                                                               |
| -------- | ----------------------------------------------------------------------------------- |
| Chain ID | `7082400`                                                                           |
| Inbox    | `0x3b8B70819f27e0438cBcE7f31894f799da52648F` (`COTI_TESTNET_DEFAULT_INBOX_ADDRESS`) |

Confirm the MPC executor against your deployed release — presets in `PodNetworkConstants` can lag a redeploy; wire the address from the table above (or your env) in `configureCoti`.


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