Iziswap-sdk NPM

iZUMi-iZiSwap-sdk

The latest version of the SDK is considered Alpha software and may contain bugs or change significantly between patch versions.

Check iZUMi.finance for in-depth documentation.

Check Github for latest sdk code.

run example

Notice that, this section we only talk about how to run the attached examples after cloning this sdk-source-project from github. For usage of this sdk, you should install this package from npm in your project (see next section for installation command).

Suppose you want to run example of mint, you could first compile that example.

$ npx tsc example/liquidityManager/mint.ts --resolveJsonModule --esModuleInterop --outDir bin

and then run the compiled js file.

$ node bin/example/liquidityManager/mint.js

install

to install sdk in your project, use following command.

$ npm install iziswap-sdk

new from version 1.2.0

the difference is that we add a new way to specify whether to use wrapped gas token (like WBNB on BSC, or WETH on ethereum or arbitrum...), or to use gas token (like BNB on BSC or ETH on ethereum or arbitrum)

in the past versions (before 1.2.0), when we call swap/mint/collect/newLimitOrder or other interfaces to pay or acquire tokens, we need to specify a field named strictERC20Token in the params to indicate the sdk whether to treat wrapped gas token as erc20 token or gas token.

And in the version from 1.2.0, we can also indicate that via setting appropriate symbol in the token object.

For example, assume we want to pay at most 1 BNB to get at least 300 USDC on bsc's iziswap. We could fill the swap params as following:

    const BNB = {
        address: '0xbb4cdb9cbd36b01bd1cbaebf2de08d9173bc095c',
        symbol: 'BNB',
        chainId: ChainId.BSC
    } as TokenInfoFormatted
    const USDC = {
        address: '0xc1f47175d96fe7c4cd5370552e5954f384e3c791',
        symbol: 'USDC',
        chainId: ChainId.BSC
    } as TokenInfoFormatted
    const swapParams = {
        tokenChain: [BNB, USDC],
        feeChain: [200],
        inputAmount: new BigNumber(10 ** 18).toFixed(0)
        minOutputAmount: new BigNumber(300 * 10 ** 6).toFixed(0)
    } as SwapChainWithExactInputParams

in the old versions, if we want to pay BNB in the form of WBNB, we should set swapParams.strictERC20Token as true, and if we want to pay BNB directly, we should set swapParams.strictERC20Token as false or undefined.

from the version 1.2.0, if we want to pay BNB in the form of WBNB, we should set swapParams.strictERC20Token as true, and if we want to pay BNB directly, we should set swapParams.strictERC20Token as false but not undefined.

That is because, if we set that value as undefined, the sdk will check token's symbol field to indicate whether to use gas token or not.

if we set swapParams.strictERC20Token as undefined, we should replace BNB.symbol as WBNB in the above code if we want to pay from our WBNB balance.