# StablePair Deployments (/docs/protocols/uniswap-labs-hooks/stable-pair/deployments)

Find StablePair hook addresses and live pool parameters on Ethereum and Sepolia.

The registered v4 hook is an ERC1967 proxy. Its address is permanent and encodes the hook permission flags; the implementation behind it changes on a governance upgrade. Always integrate against the hook address.

## Mainnet Deployments
## Ethereum: 1
| Contract                        | Address                                                                                                                 |
| :------------------------------ | :---------------------------------------------------------------------------------------------------------------------- |
| StablePairHook (hook)           | [`0x0000113dCf4ADd69999Fad8F20F2b63F979bfcC0`](https://etherscan.io/address/0x0000113dCf4ADd69999Fad8F20F2b63F979bfcC0) |
| StablePairHook (implementation) | [`0x5f216d21b1C81346938EDDc1Df7e0111A0F64000`](https://etherscan.io/address/0x5f216d21b1C81346938EDDc1Df7e0111A0F64000) |

## Testnet Deployments
## Sepolia: 11155111
| Contract                        | Address                                                                                                                         |
| :------------------------------ | :------------------------------------------------------------------------------------------------------------------------------ |
| StablePairHook (hook)           | [`0x2F45A94782d3e187BaB5F72448bb85d6d1d67CC0`](https://sepolia.etherscan.io/address/0x2F45A94782d3e187BaB5F72448bb85d6d1d67CC0) |
| StablePairHook (implementation) | [`0xDBc81fFadaB5ee9c9fB1c2D43Bef547EB9c64000`](https://sepolia.etherscan.io/address/0xDBc81fFadaB5ee9c9fB1c2D43Bef547EB9c64000) |

## Pool Parameters
Two pools are planned on Ethereum. Neither is live yet; the pool IDs below are derived from the planned pool keys.

## USDC / USDT
| Parameter      | Value                                                                                                                        |
| :------------- | :--------------------------------------------------------------------------------------------------------------------------- |
| Pool ID        | `0x2b21c65d9a7dc6926ee330a1c6e5a8037fd81774f3dc066536f800128e39f634`                                                         |
| currency0      | USDC [`0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48`](https://etherscan.io/address/0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48) |
| currency1      | USDT [`0xdAC17F958D2ee523a2206206994597C13D831ec7`](https://etherscan.io/address/0xdAC17F958D2ee523a2206206994597C13D831ec7) |
| Fee            | Dynamic (`0x800000`)                                                                                                         |
| Tick spacing   | 1                                                                                                                            |
| Reference rate | 1 USDC = 1 USDT                                                                                                              |

## USDC / USDG
| Parameter      | Value                                                                                                                        |
| :------------- | :--------------------------------------------------------------------------------------------------------------------------- |
| Pool ID        | `0xeda62d2906d0edf26d40c793d581609552a44a87f618a98ff76ebe8dde4b7edb`                                                         |
| currency0      | USDC [`0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48`](https://etherscan.io/address/0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48) |
| currency1      | USDG [`0xe343167631d89B6Ffc58B88d6b7fB0228795491D`](https://etherscan.io/address/0xe343167631d89B6Ffc58B88d6b7fB0228795491D) |
| Fee            | Dynamic (`0x800000`)                                                                                                         |
| Tick spacing   | 1                                                                                                                            |
| Reference rate | 1 USDC = 1 USDG                                                                                                              |

> [!NOTE]
> Do not hardcode pool IDs. Derive them from the pool key, and read each pool's live fee configuration from the hook rather than from this page. Parameters can be changed by governance.