Dexter

Customizable Typescript SDK for interacting with Cardano DEXs.

### What You Can Do - Pull Liquidity Pools from DEX APIs or On-chain using [Blockfrost](https://blockfrost.io/) / [Kupo](https://github.com/CardanoSolutions/kupo) - Submit and cancel swap orders - Submit split swap orders across multple DEXs - Build your own data, wallet, or asset metadata providers to plug into Dexter - Build swap datums given specific parameters using Dexters _Definition Builder_ - Load wallets using a seedphrase or CIP-30 interface using [Lucid](https://github.com/spacebudz/lucid) ### Notes - You may need to use the flag `--experimental-specifier-resolution=node` when building your project to correctly import Dexter - All figures/parameters represented as a bigint are denominated in lovelaces ### Install ##### NPM ``` npm i @indigo-labs/dexter ``` ##### Yarn ``` yarn add @indigo-labs/dexter ``` ### Quick Start ```js const dexterConfig: DexterConfig = { shouldFetchMetadata: true, // Whether to fetch asset metadata (Best to leave this `true` for accurate pool info) shouldFallbackToApi: true, // Only use when using Blockfrost or Kupo as data providers. On failure, fallback to the DEX API to grab necessary data shouldSubmitOrders: false, // Allow Dexter to submit orders from swap requests. Useful during development metadataMsgBranding: 'Dexter', // Prepend branding name in Tx message }; const requestConfig: RequestConfig = { timeout: 5000, // How long outside network requests have to reply proxyUrl: '', // URL to prepend to all outside URLs. Useful when dealing with CORs retries: 3, // Number of times to reattempt any outside request }; const dexter: Dexter = new Dexter(dexterConfig, requestConfig); // Basic fetch example dexter.newFetchRequest() .onAllDexs() .getLiquidityPools() .then((pools: LiquidityPool[]) => { console.log(pools); }); // Example loading wallet to be used in a swap const lucidProvider: BaseWalletProvider = new LucidProvider(); lucidProvider .loadWallet(cip30Interface, { url: 'https://cardano-mainnet.blockfrost.io/api/v0', projectId: '' }) .then((walletProvider: BaseWalletProvider) => { dexter.withWalletProvider(walletProvider) .newFetchRequest() ... }); ``` ### Dexter API All providers outlined below are modular, so you can extend the 'base' of the specific provider you want to supply, and provide it to Dexter with one of the methods below.
dexByName(string): BaseDex | undefined Grab a DEX instance by name. ##### Using ```js dexter.dexByName(Minswap.identifier) ... ```

withDataProvider(BaseDataProvider): Dexter Set where Dexter should grab liquidity pool data. By default, Dexter will use the DEX APIs to grab information. However, you can use [Blockfrost](https://github.com/IndigoProtocol/dexter/blob/master/docs/providers/data.md) or [Kupo](https://github.com/IndigoProtocol/dexter/blob/master/docs/providers/data.md) to supply your own data. ##### Using ```js const provider: BaseDataProvider = new BlockfrostProvider( { url: 'https://cardano-mainnet.blockfrost.io/api/v0', projectId: '', } ); dexter.withDataProvider(provider) ... ```

withWalletProvider(BaseWalletProvider): Dexter Set who Dexter sends wallet requests to. At this time, Dexter only supplies a Mock wallet provider & a [Lucid provider](./docs/providers/wallet.md). Behind the scenes, the lucid provider leverages [Lucid](https://github.com/spacebudz/lucid) to manage your wallet & create transactions. ##### Using ```js const provider: BaseWalletProvider = new LucidProvider(); const seedphrase: string[] = ['...']; const blockfrostConfig: BlockfrostConfig = { url: 'https://cardano-mainnet.blockfrost.io/api/v0', projectId: '', }; provider.loadWalletFromSeedPhrase(seedphrase, blockfrostConfig) .then((walletProvider: BaseWalletProvider) => { dexter.withWalletProvider(walletProvider) ... }); ```

withMetadataProvider(BaseMetadataProvider): Dexter Set where Dexter grabs necessary asset metadata. By default, Dexter will use the [Cardano Token Registry](https://github.com/cardano-foundation/cardano-token-registry) for grabbing asset metadata. You can extend the `BaseMetadataProvider` interface to provide your own metadata. ##### Using ```js const provider: BaseMetadataProvider = new TokenRegistryProvider(); dexter.withMetadataProvider(provider) ... ```

newFetchRequest(): FetchRequest Create new request for liquidity pool data. For available methods on the `FetchRequest` instance, please see those specific [docs](https://github.com/IndigoProtocol/dexter/blob/master/docs/requests/fetch-request.md). ##### Using ```js dexter.newFetchRequest() ... ```

newSwapRequest(): SwapRequest Create new request for a swap order. For available methods on the `SwapRequest` instance, please see those specific [docs](https://github.com/IndigoProtocol/dexter/blob/master/docs/requests/swap-request.md). ##### Using ```js dexter.newSwapRequest() ... ```

newSplitSwapRequest(): SplitSwapRequest Create new request for a split swap order. For available methods on the `SplitSwapRequest` instance, please see those specific [docs](https://github.com/IndigoProtocol/dexter/blob/master/docs/requests/split-swap-request.md). ##### Using ```js dexter.newSplitSwapRequest() ... ```

newCancelSwapRequest(): CancelSwapRequest Create new request for cancelling a swap order. For available methods on the `CancelSwapRequest` instance, please see those specific [docs](https://github.com/IndigoProtocol/dexter/blob/master/docs/requests/cancel-swap-request.md). ##### Using ```js dexter.newCancelSwapRequest() ... ```

newSplitCancelSwapRequest(): SplitCancelSwapRequest Create new request for cancelling multiple swap orders. For available methods on the `SplitCancelSwapRequest` instance, please see those specific [docs](https://github.com/IndigoProtocol/dexter/blob/master/docs/requests/split-cancel-swap-request.md). ##### Using ```js dexter.newSplitCancelSwapRequest() ... ```
### More Docs - [Data Providers](https://github.com/IndigoProtocol/dexter/blob/master/docs/providers/data.md) - [Wallet Providers](https://github.com/IndigoProtocol/dexter/blob/master/docs/providers/wallet.md) - [Creating a Fetch Request](https://github.com/IndigoProtocol/dexter/blob/master/docs/requests/fetch-request.md) - [Creating a Swap Request](https://github.com/IndigoProtocol/dexter/blob/master/docs/requests/swap-request.md) - [Creating a Split Swap Request](https://github.com/IndigoProtocol/dexter/blob/master/docs/requests/split-swap-request.md) - [Creating a Cancel Swap Request](https://github.com/IndigoProtocol/dexter/blob/master/docs/requests/cancel-swap-request.md) - [Creating a Split Cancel Swap Request](https://github.com/IndigoProtocol/dexter/blob/master/docs/requests/split-cancel-swap-request.md) - [Listening for transaction events](https://github.com/IndigoProtocol/dexter/blob/master/docs/dex-transaction.md) - [Commonly returned models](https://github.com/IndigoProtocol/dexter/blob/master/docs/models.md)