@sovryn/sdk
v2.0.4
Published
## Installation
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Sovryn SDK
Installation
yarn add @sovryn/sdk @sovryn/contracts @sovryn/ethers-provider ethers @ethersproject/providers @ethersproject/abstract-provider
Smart Router
Smart router is a wrapper around the smart contracts that allows you to interact with the smart contracts for swapping tokens in a more convenient way.
Usage
import { SmartRouter, DEFAULT_SWAP_ROUTES } from '@sovryn/sdk';
import { getProvider } from '@sovryn/ethers-provider';
// Get ethers provider
const provider = getProvider();
// Create a new instance of the smart router, passing the provider and the swap routes to use
const smartRouter = new SmartRouter(provider, DEFAULT_SWAP_ROUTES);
// Get token addresses we want to swap
const xusdToken = '0xb5999795BE0EbB5bAb23144AA5FD6A02D080299F';
const sovToken = '0xEFc78fc7d48b64958315949279Ba181c2114ABBd';
const amount = 100;
// Get the best swap route for a token pair
// result contains the best route and the amount of tokens we will get
// { route: SwapRoute, quote: BigNumber }
const result = await smartRouter.getBestQuote(ChainIds.RSK_MAINNET, xusdToken, sovToken, amount);
// Check if we need to permit xusd token to be able to swap
// permitTxData will return the permit data to be signed by the user
const permitTxData = await result.route.permit(xusdToken, sovToken, amount)
let signedPermit: string | undefined;
if (permitTxData) {
// ask user to sign the transaction with permitTxData as data
signedPermit = await signPermit(permitTxData);
}
// If permit is possible and approval is not required, we can skip the approval step
if (!permitTxData || permitTxData?.approvalRequired) {
// Check if we need to approve xusd token to be able to swap
// approveTxData will return the transaction data to be signed by the user
// In most cases it will only have `to` and `data` fields
const approveTxData = await result.route.approve(xusdToken, sovToken, amount)
if (approveTxData) {
// ask user to sign the transaction with approveTxData as data
}
}
// Swap tokens
const txData = await result.route.swap(xusdToken, sovToken, amount, {
// pass the permit data if permit is required
typedDataValue: permitTxData?.typedData?.values,
// pass signature if permit is required
typedDataSignature: signedPermit,
});
// Sign the transaction with the user wallet of your choosing and send it to the network
const tx = await signAndSend(txData);