Feat: FlashmintNAV #186
Feat: FlashmintNAV #186
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| */ | ||
| function issueSetFromExactETH( | ||
| ISetToken _setToken, | ||
| uint256 _minSetTokenAmount, |
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@janndriessen double-checking that you're able to integrate with this issuance function that doesn't return an exact amount of SetTokens?
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@edkim so we'd have to call getIssueAmount or getRedeemAmountOut to determine this minSetTokenAmount?
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@janndriessen exactly. See example for issuance here https://github.com/IndexCoop/index-coop-smart-contracts/pull/186/files#r1768661768.
And for redemption https://github.com/IndexCoop/index-coop-smart-contracts/pull/186/files#r1768665399
| ISetToken _setToken, | ||
| address _inputToken, | ||
| uint256 _inputTokenAmount, | ||
| DEXAdapterV2.SwapData memory _reserveAssetSwapData |
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@edkim reserve asset would be e.g. USDC? and then the regular swap data format e.g. if inputToken DAI for DAI-USDC for the given inputTokenAmount?
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Yes, reserve asset is USDC for USDCY. So for issuing with DAI the swapData would look like this example test:
index-coop-smart-contracts/test/integration/ethereum/flashMintNAV.spec.ts
Lines 336 to 341 in e21b456
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| it("should issue SetToken with ETH", async () => { | ||
| const setTokenOutEstimate = await subjectQuote(); | ||
| subjectMinSetTokenOut = setTokenOutEstimate.mul(995).div(1000); // 0.5% slippage |
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@janndriessen here's an example of getting the minSetTokenAmount for issuance
| it("should redeem SetToken for ETH", async () => { | ||
| const outputAmountEstimate = await subjectQuote(); | ||
| subjectMinOutputTokenAmount = outputAmountEstimate.mul(995).div(1000); // 0.5% slippage | ||
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Example of estimating minOutputTokenAmount when redeeming.
| /** | ||
| * @title FlashMintNAV | ||
| * @author Index Cooperative | ||
| * @notice Part of a family of FlashMint contracts that allows users to issue and redeem SetTokens with a single input/output token (ETH/ERC20). | ||
| * Allows the caller to combine a DEX swap and a SetToken issuance or redemption in a single transaction. | ||
| * Supports SetTokens that use a NAV Issuance Module, and does not require use of off-chain APIs for swap quotes. | ||
| * The SetToken must be configured with a reserve asset that has liquidity on the exchanges supported by the DEXAdapterV2 library. | ||
| * | ||
| * See the FlashMint SDK for integrating any FlashMint contract (https://github.com/IndexCoop/flash-mint-sdk). | ||
| */ |
| erc4626Oracle = await deployer.setV2.deployERC4626Oracle( | ||
| tokenAddresses.gtUSDC, | ||
| usdc(1), | ||
| "gtUSDC - USDC Calculated Oracle", | ||
| ); |
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noting this constructor's arguments may change soon IndexCoop/index-protocol#49
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