@indexcoop/flash-mint-sdk
v2.4.0
Published
The FlashMintSDK of the Index Coop.
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Flash Mint SDK v2
The Flash Mint SDK provides easy to use functions to integrate flashminting for Index's products.
The Contracts
To find out more about the contracts, go to Index's smart contracts repo.
This SDK currently supports the contracts listed here. Check out the utility functions for easily obtaining the correct addresses and contracts.
Install
$ npm install @indexcoop/flash-mint-sdk
Limitations
A limitation to be aware of (especially for getting quotes) is that the contracts can only mint or redeem an exact amount of Index token.
Additionally, make sure that the (Index/Set) tokens have been approved on the specific FlashMint contracts.
Usage
Quotes
In v2 we made it way easier to fetch a quote. Meet the FlashMintQuoteProvider
.
This provider will now return the appropriate quotes for any Index token, automatically
selecting the correct FlashMint contract for you.
import { FlashMintQuoteProvider } from '@indexcoop/flash-mint-sdk'
// Input/output token should be of type QuoteToken with the following properties
const inputToken = {
symbol: 'ETH',
decimals: 18,
address: '0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE',
}
const outputToken = {
symbol: 'icETH',
decimals: 18,
address: '0x7C07F7aBe10CE8e33DC6C5aD68FE033085256A84',
}
const rpcProvider = new JsonRpcProvider('')
const quoteProvider = new FlashMintQuoteProvider(rpcProvider)
const quote = await quoteProvider.getQuote({
isMinting: true,
inputToken,
outputToken,
indexTokenAmount: wei(1),
slippage: 0.1,
})
The returned quote is an object with meta data but most importantly the inputOutputAmount
which is the quote for the given request and a tx
object which is a tx object
basically ready to be send.
interface FlashMintQuote {
chainId: number
contractType: FlashMintContractType
contract: string
isMinting: boolean
inputToken: QuoteToken
outputToken: QuoteToken
indexTokenAmount: BigNumber
inputOutputAmount: BigNumber
slippage: number
tx: TransactionRequest
}
You can still fetch quotes for individual FlashMint contracts e.g. using the ZeroExQuoteProvider
.
import { QuoteToken, ZeroExQuoteProvider } from '@indexcoop/flash-mint-sdk'
// Input/output token should be of type QuoteToken with the following properties
const inputToken: QuoteToken = {
symbol: 'ETH',
decimals: 18,
address: '0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE',
}
const outputToken: QuoteToken = {
symbol: 'dsETH',
decimals: 18,
address: '0x341c05c0E9b33C0E38d64de76516b2Ce970bB3BE',
}
const rpcProvider = new JsonRpcProvider('')
const quoteProvider = new ZeroExQuoteProvider(rpcProvider, zeroExApiV1)
const quote = await quoteProvider.getQuote({
isMinting: true,
inputToken,
outputToken,
indexTokenAmount,
slippage: 0.1,
})
The quote providers for the individual FlashMint contracts will return not just
the inputOutputAmount
but also the swap data/component quotes
.
interface FlashMintZeroExQuote {
componentQuotes: string[]
indexTokenAmount: BigNumber
inputOutputTokenAmount: BigNumber
}
Flashmint
To execute the flashminting of an Index for convenience use the tx
object
returned by the FlashMintQuoteProvider
.
...
const quoteProvider = new FlashMintQuoteProvider(rpcProvider)
const quote = await quoteProvider.getQuote({...})
let tx = quote.tx
const gasEstimate = await provider.estimateGas(tx)
tx.gasLimit = gasEstimate
const res = await signer.sendTransaction(tx)
console.log(res.hash)
Alternatively, you can use the swap data returned by the individual providers to construct the tx yourself which then has to be executed on the correct FlashMint contract for that specific Index token. Use the utility functions for easily obtaining the correct addresses and contracts.
Develoment
.env vars
When adding new .env vars do not forget to update the publish.yml
Adding a new Index token
- add a test for determining the correct issuance module here
- add a test for determining the correct contract here
- if there is a new FlashMint contract, add it as described below
- additionally, add a test in tests
- add symbol to
function getContractType(token: string)
inFlashMintQuoteProvider
Adding a new contract
- add the contract address in constants
- add appropriate getters and tests in utils/contracts
- add a new builder and quote provider
- The new quote provider has to be integrated into the FlashMintQuoteProvider
Contributing
We will encourage contributing and open dialog how to improve the SDK. How though is still TBD. 🚧 In the meantime just open an issue.
License
Copyright © 2023 Index Coop.