Gelato Limit Order React SDK

Use Gelato's react component or hooks to place limit buy and sell orders on Ethereum, Polygon and Fantom using Gelato Network.

- To hook it up in simple and direct way, using our default style, just use our react component (uniswap trade style widget). It's as is as a couple of lines of code.
- If your want to build your custom UI you can use our react hooks and plug them in into your components. Check the steps below.

> :warning: :warning: :warning: Warning :warning: :warning: :warning: :
> Version 1.0.0 introduced new features and our system changed to an approval/transferFrom flow. You should use the latest version available (>= 1.0.0). If you are using an old version you should update to the latest version immediately. Versions below 1.0.0 are being deprecated.

Demo

alt="Gelato Limit orders"
style="width: 440px;"
/>

Installation

yarn add -D @gelatonetwork/limit-orders-react

or

npm install --save-dev @gelatonetwork/limit-orders-react

Getting started

Wrap your app with the GelatoProvider and pass the gelato reducers into your redux store.

In your store pass the gelato reducers:

``tsx
import { configureStore } from "@reduxjs/toolkit";
import { save, load } from "redux-localstorage-simple";
import {
gelatoReducers,
GELATO_PERSISTED_KEYS,
} from "@gelatonetwork/limit-orders-react";

// OPTIONAL: set the gelato persisted keys
// If don't use redux-localstorage-simple you can skip this step and only set the reducers
// You can also skip you don't use the GelatoLimitOrderPanel component
const PERSISTED_KEYS: string[] = ["your_keys", ...GELATO_PERSISTED_KEYS];

const store = configureStore({
reducer: {
...your_reducers,
// Pass the gelato reducers
...gelatoReducers,
},
middleware: [save({ states: PERSISTED_KEYS, debounce: 1000 })],
preloadedState: load({ states: PERSISTED_KEYS }),
});

export default store;
`

In your main file wrap your app with GelatoProvider:

`tsx
import React from "react";
import ReactDOM from "react-dom";
import { GelatoProvider } from "@gelatonetwork/limit-orders-react";
import { useActiveWeb3React } from "hooks/web3";

function Gelato({ children }: { children?: React.ReactNode }) {
const { library, chainId, account } = useActiveWeb3React();
return (
library={library}
chainId={chainId}
account={account ?? undefined}

// Optionally your can set a specific handler to block trades on a specific handler
// Currently we offer support out of the box for "uniswap", "quickswap", "spookyswap" and "spiritswap"
// Please reach out to us if you want to register a custom handler
// Make sure chainId and handler are valid
// handler={'uniswap'}

// [ONLY IF USING COMPONENT] Optionally pass a toggle modal to be able to connect
// to a wallet via the component button
// toggleWalletModal={toggleWalletModal}
// Optionally, pass a custom subgraph url subgraphUrl={"..."}
// Optionally, parse tokenlist as tokenListURLs={["https://tokenlist.com"]}
// Optionally, set your own bases (otherwise the default one will be used) bases={bases} (where bases is an array of {chainId:number; address:string; decimals:number; name:string; symbol:string;})
// By default useDefaultThemeand useDarkMode are set to true
// Optionally, if you can try to use and pass your own theme by setting useDefaultTheme={false}
// as long as it conforms with our theme definitions (you can check our ThemeProvider here)
// Optionally, if your main theme does not comply with our definitions, you can also wrap GelatoProvider
// with a custom ThemeProvider with your own custom definitions. (check our ThemeProvider as an example)
// useDefaultTheme={false}
// useDarkMode={false}
>
{children}

);
}

ReactDOM.render(
















,
document.getElementById("root")
);
`

Use the Gelato react component

Using the Gelato react component is the easiest option to get limit orders into your app.

`tsx
import React from "react";
import {
GelatoLimitOrderPanel,
GelatoLimitOrdersHistoryPanel,
} from "@gelatonetwork/limit-orders-react";

export default function LimitOrder() {
return (
<>
{/To hide common bases in search modal you can pass into the component showCommonBases={false} /}



);
}
`

Use the Gelato react hooks

Using the gelato hooks all logic and state updates are encapsulated and all your have to do is plug them into your application.

Hooks available:

- useGelatoLimitOrders()
- useGelatoLimitOrdersHandlers()
- useGelatoLimitOrdersHistory()
- useGelatoLimitOrdersLib()
- useGasOverhead()

`tsx
import React from "react";
import {
useGelatoLimitOrders,
GelatoLimitOrdersHistoryPanel,
} from "@gelatonetwork/limit-orders-react";


export default function LimitOrder() {
const {
handlers: {
handleInput,
handleRateType,
handleCurrencySelection,
handleSwitchTokens,
handleLimitOrderSubmission,
handleLimitOrderCancellation
},
derivedOrderInfo: {
parsedAmounts,
currencies,
currencyBalances,
trade,
formattedAmounts,
inputError,
},
orderState: { independentField, rateType, typedValue },
} = useGelatoLimitOrders();

const { open, cancelled, executed, expired } = useGelatoLimitOrdersHistory();

...
}
`

Use the Gelato react hook useGasOverhead() to calculate real execution price

For networks using the "gas-model" to pay for execution. The Execution price will be slightly higher then the entered Price. Orders will execute when minReturn + transactionFee === "current price"

Hook to calculate actual execution price:

`tsx
import React, { useMemo } from "react";
import {
useGasOverhead,
CurrencyAmount,
useCurrency,
TradePrice
} from "@gelatonetwork/limit-orders-react";

export default function LimitOrderCard() {
...
const inputToken = useCurrency(order.inputToken);
const outputToken = useCurrency(order.outputToken);

const inputAmount = useMemo(
() =>
inputToken && order.inputAmount
? CurrencyAmount.fromRawAmount(inputToken, order.inputAmount)
: undefined,
[inputToken, order.inputAmount]
);

const isEthereum = isEthereumChain(chainId ?? 1);

const outputAmount = useMemo(
() =>
outputToken && rawMinReturn
? CurrencyAmount.fromRawAmount(outputToken, order.minReturn)
: undefined,
[outputToken, rawMinReturn]
);

const {
gasPrice,
realExecutionPrice, // returns @uniswap/sdk-core Price object
realExecutionPriceAsString,
} = useGasOverhead(inputAmount, outputAmount);

const [ inverted, setInverted, ] = useState(true);

...

return (
<>
{realExecutionPrice ? (
price={ethereumExecutionPrice}
showInverted={inverted}
setShowInverted={setInverted}
fontWeight={500}
fontSize={12}
/>
): ... }

)
}
`

Expiration

> :warning: :warning: :warning: Warning :warning: :warning: :warning: :
> Important: Open orders will expire three months 7889238 seconds after creation. Expired orders will be filtered out of open and pushed into the expired in useGelatoLimitOrdersHistory().

See complete integration example here.

Note: You can also import the following hooks and functions from the library:

- useCurrency (to get the currency entity to be traded by address)
- useUSDCValue (to get fiat value given a CurrencyAmount)
- useCurrencyBalances (to get account balances for given Currencies)
- useTradeExactIn (to get a trade using an input amount)
- useTradeExactOut (to get a trade using an output amount)
- tryParseAmount (to try to parse a user entered amount for a given token)
- ApprovalState and useApproveCallbackFromInputCurrencyAmount (to max approve and verify allowance)
- useTransactionAdder (to add published transaction)

$3

`typescript
useGelatoLimitOrders(): {
handlers: GelatoLimitOrdersHandlers;
derivedOrderInfo: DerivedOrderInfo;
orderState: OrderState;
}

useGelatoLimitOrdersHandlers(): {
handleLimitOrderSubmission: (
orderToSubmit: {
inputToken: string;
outputToken: string;
inputAmount: string;
outputAmount: string;
owner: string;
},
overrides?: Overrides
) => Promise;

handleLimitOrderCancellation: (
order: Order,
orderDetails?: {
inputTokenSymbol: string;
outputTokenSymbol: string;
inputAmount: string;
outputAmount: string;
},
overrides?: Overrides
) => Promise;

handleInput: (field: Field, value: string) => void;

handleCurrencySelection: (
field: Field.INPUT | Field.OUTPUT,
currency: Currency
) => void;

handleSwitchTokens: () => void;

handleRateType: (rateType: Rate, price?: Price) => void;
}

// includeOrdersWithNullHandler defaults to false
useGelatoLimitOrdersHistory(includeOrdersWithNullHandler?: boolean): {
open: { pending: Order[]; confirmed: Order[] };
cancelled: { pending: Order[]; confirmed: Order[] };
executed: Order[];
expired: Order[];
clearLocalStorageAndRefetchDataFromSubgraph: () => void
}

useGelatoLimitOrdersLib(): GelatoLimitOrders | undefined
``

$3

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