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packages/contracts/src/dollar/interfaces/ICurveStableSwapFactoryNG.sol
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| // SPDX-License-Identifier: MIT | ||
| pragma solidity 0.8.19; | ||
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| import {IERC20} from "@openzeppelin/contracts/interfaces/IERC20.sol"; | ||
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| /** | ||
| * @notice Factory allows the permissionless deployment of up to | ||
| * eight-coin plain pools (ex: DAI-USDT-USDC) and metapools (ex: USDT-3CRV). | ||
| * Liquidity pool and LP token share the same contract. | ||
| */ | ||
| interface ICurveStableSwapFactoryNG { | ||
| /** | ||
| * @notice Deploys a stableswap NG metapool | ||
| * @param _base_pool Address of the base pool to pair the token with. For tripool (DAI-USDT-USDC) use its pool | ||
| * address at 0xbEbc44782C7dB0a1A60Cb6fe97d0b483032FF1C7. | ||
| * @param _name Name of the new metapool, ex: `Dollar/3CRV` | ||
| * @param _symbol Symbol for the new metapool’s LP token - will be concatenated with the base pool symbol, ex: `Dollar3CRV` | ||
| * @param _coin Address of the coin being used in the metapool, ex: use Dollar token address | ||
| * @param _A Amplification coefficient. If set to 0 then bonding curve acts like Uniswap. Any >0 value | ||
| * makes the bonding curve to swap at 1:1 constant price, the more `_A` the longer the constant price period. | ||
| * Curve recommends set it to 100 for crypto collateralizard stablecoins. This parameter can be updated later. | ||
| * @param _fee Trade fee, given as an integer with 1e10 precision, ex: 40000000 = 0.04% fee | ||
| * @param _offpeg_fee_multiplier Off-peg multiplier. Curve recommends set it to `20000000000`. This parameter can be updated | ||
| * later. More info: https://docs.curve.fi/stableswap-exchange/stableswap-ng/pools/overview/#dynamic-fees | ||
| * @param _ma_exp_time MA time; set as time_in_seconds / ln(2), ex: 866 = 600 seconds, 2597 = 1800 seconds. | ||
| * This parameter can be updated later. | ||
| * @param _implementation_idx Index of the metapool implementation to use. Can be retrieved | ||
| * via `ICurveStableSwapFactoryNG.metapool_implementations()`. There is only 1 metapool implementation right now | ||
| * so use index `0`. | ||
| * @param _asset_type Asset type of the pool as an integer. Available asset type indexes: | ||
| * - 0: Standard ERC20 token with no additional features | ||
| * - 1: Oracle - token with rate oracle (e.g. wstETH) | ||
| * - 2: Rebasing - token with rebase (e.g. stETH) | ||
| * - 3: ERC4626 - token with convertToAssets method (e.g. sDAI) | ||
| * Dollar is a standard ERC20 token so we should use asset type with index `0`. | ||
| * @param _method_id First four bytes of the Keccak-256 hash of the function signatures of | ||
| * the oracle addresses that give rate oracles. This is applied only to asset type `1` (Oracle). | ||
| * For Dollar token deployment set empty. | ||
| * @param _oracle Rate oracle address. This is applied only to asset type `1` (Oracle). | ||
| * For Dollar token deployment set empty address. | ||
| * @return Deployed metapool address | ||
| */ | ||
| function deploy_metapool( | ||
| address _base_pool, | ||
| string memory _name, | ||
| string memory _symbol, | ||
| address _coin, | ||
| uint256 _A, | ||
| uint256 _fee, | ||
| uint256 _offpeg_fee_multiplier, | ||
| uint256 _ma_exp_time, | ||
| uint256 _implementation_idx, | ||
| uint8 _asset_type, | ||
| bytes4 _method_id, | ||
| address _oracle | ||
| ) external returns (address); | ||
| } |