SDK#

npm install @okxconnect/universal-provider

import {OKXUniversalProvider} from "@okxconnect/universal-provider";

const okxUniversalProvider = await OKXUniversalProvider.init({
    dappMetaData: {
        name: "application name",
        icon: "application icon url"
    },
})

var session = await okxUniversalProvider.connect({
    namespaces: {
        eip155: {
            // Please pass in as many chain ids as you need.
            chains: ["eip155:1", "eip155:xxx"],
            rpcMap: {
               1: "https://url to your rpc", // Corresponds to the chain id above, just write the chain id number
               xxx: "https://url to your rpc"
            },
            defaultChain: "1"
        }
    },
    optionalNamespaces: {
        eip155: {
            chains: ["eip155:43114"]
        }
    },
    sessionConfig: {
        redirect: "tg://resolve"
    }
})

okxUniversalProvider.request(requestArguments, chain);

let chain = 'eip155:1'
var data = {}

// Execute personalSign on the chain.
The first parameter in the // params array is mandatory for Challenge;
// The second parameter, hex encoded address, is optional.
data = {
    
    “params": [
        “0x506c65617365207369676e2074686973206d65737361676520746f20636f6e6669726d20796f7572206964656e746974792e”, '0x4B0897b’, ”0x4B0897b
        “0x4B0897b0513FdBeEc7C469D9aF4fA6C0752aBea7”
    ]
}
var personalSignResult = await okxUniversalProvider.request(data, chain)
//personalSignResult: 0xe8d34297c33a61”

// Execute eth_signTypedData_v4 on chain chain
// params array, first parameter is Address is optional;
// The second parameter is TypedData, which must be passed.
data = {
    "method": "eth_signTypedData_v4",
    "params": [
        "0x00000",
        {
            "domain": {
                "name": "Ether Mail",
                "version": "1",
                "chainId": 1,
                "verifyingContract": "0xcccccccccccccccccccccccccccccccccccccccc"
            },
            "message": {
                "from": {"name": "Cow", "wallet": "0xCD2a3d9F938E13CD947Ec05AbC7FE734Df8DD826"},
                "to": {"name": "Bob", "wallet": "0xbBbBBBBbbBBBbbbBbbBbbbbBBbBbbbbBbBbbBBbB"},
                "contents": "Hello, Bob!"
            },
            "primaryType": "Mail",
            "types": {
                "EIP712Domain": [{"name": "name", "type": "string"}, {
                    "name": "version",
                    "type": "string"
                }, {"name": "chainId", "type": "uint256"}, {"name": "verifyingContract", "type": "address"}],
                "Person": [{"name": "name", "type": "string"}, {"name": "wallet", "type": "address"}],
                "Mail": [{"name": "from", "type": "Person"}, {"name": "to", "type": "Person"}, {
                    "name": "contents",
                    "type": "string"
                }]
            }
        }
    ]
}
var signTypeV4Result = await okxUniversalProvider.request(data, chain)
//signTypeV4Result: "0xa8bb3c6b33a119d..."

// Execute sendTransaction on the chain,
data = {
    "method": "eth_sendTransaction",
    "params": [
        {
            to: "0x4B...",
            from: "0xDe...",
            gas: "0x76c0",
            value: "0x8ac7230489e80000",
            data: "0x",
            gasPrice: "0x4a817c800"
        }
    ]
}
var sendTransactionResult = await okxUniversalProvider.request(data, chain)
// "0x1ccf2c4a3d689067fc2ac..."

// Get address information for the default chain;
data = {"method": "eth_requestAccounts"}
var ethRequestAccountsResult = await okxUniversalProvider.request(data, chain)
//  ["0xf2f3e73b..."]

// Get the default chain information;
data = {"method": "eth_chainId"}
var chainIdResult = await okxUniversalProvider.request(data, chain)
//chainIdResult   1

// Switching chains;
data = {
    "method": "wallet_switchEthereumChain",
    "params": [
        {
            chainId: "0x1"
        }
    ]
}
var switchResult = await okxUniversalProvider.request(data, chain)
// switchResult null

// Add chain
data = {
    "method": "wallet_addEthereumChain",
    "params": [{
        "blockExplorerUrls": ["https://explorer.fuse.io"],
        "chainId": "0x7a",
        "chainName": "Fuse",
        "nativeCurrency": {"name": "Fuse", "symbol": "FUSE", "decimals": 18},
        "rpcUrls": ["https://rpc.fuse.io"]
    }]
}
var addEthereumChainResult = await okxUniversalProvider.request(data, chain)
//addEthereumChainResult   null

// add coins to the chain watchAsset
data = {
    "method": "wallet_watchAsset",
    "params": [{
        "type": "ERC20",
        "options": {
            "address": "0xeB51D9A39AD5EEF215dC0Bf39a8821ff804A0F01",
            "symbol": "LGNS",
            "image": "https://polygonscan.com/token/images/originlgns_32.png",
            "decimals": 9
        }
    }]
}
var watchAssetResult = await okxUniversalProvider.request(data, chain)
// watchAssetResult   
// true/false

// Execute requestRpc on the chain.
data = {"method": "eth_getBalance", "params": ["0x8D97689C9818892B700e27F316cc3E41e17fBeb9", "latest"]}
var getBalanceResult = await okxUniversalProvider.request(data, chain)
// getBalanceResult:  "0xba862b54effa"

okxUniversalProvider.setDefaultChain("eip155:1", "rpcurl")

okxUniversalProvider.disconnect();

// Generate universalLink  
okxUniversalProvider.on('display_uri’, (uri) => {
    console.log(uri);
}).
// Session information changes (e.g. adding a custom chain) will trigger this event;
okxUniversalProvider.on('session_update’, (session) => {
    console.log(JSON.stringify(session)); }); // Session information changes (e.g., adding a custom chain).

// Disconnecting triggers this event;
okxUniversalProvider.on('session_delete’, ({topic}) => {
    console.log(topic);
});

export enum OKX_CONNECT_ERROR_CODES {
    UNKNOWN_ERROR = 0,
    ALREADY_CONNECTED_ERROR = 11,
    NOT_CONNECTED_ERROR = 12,
    USER_REJECTS_ERROR = 300,
    METHOD_NOT_SUPPORTED = 400,
    CHAIN_NOT_SUPPORTED = 500,
    WALLET_NOT_SUPPORTED = 600,
    CONNECTION_ERROR = 700
}