3. Getting the signer objects

3.1 Example of getting the signer object (for manual EVM testing in the BE):

Avoid using 3.1 setup in production. Use it for initial or backend testing only.

Add your private key to the environment:

touch .env
echo "SK=<Replace this with your Private Key>" >> .env

// EVM chains compatible wallet:
import { Wallet } from "ethers";
import { config } from 'dotenv';
config();
// EVM signer for testing in the BE
const signer = new Wallet(
        process.env.SK!,
        // Replace 'polygonParams'
        // with the relevant parameter
        // from the table below
        CONFIG.polygonParams?.provider
    );

Chain	Parameters	Chain Nonce
Elrond	elrondParams	2
BSC	bscParams	4
Ethereum	ropstenParams	5
Avalanche	avalancheParams	6
Polygon	polygonParams	7
Fantom	fantomParams	8
Tron	tronParams	9
Harmony	harmonyParams	12
xDai	xDaiParams	14
Algorand	algorandParams	15
Fuse	fuseParams	16
Tezos	tezosParams	18
Velas	velasParams	19
Aurora	auroraParams	21
Godwoken	godwokenParams	22
Gatechain	gatechainParams	23
VeChain	vechainParams	25

3.2 Example of getting the signer object (in the FE for web3):

// EVM chains compatible signer:
import ethers from "ethers";
const signer = new ethers.providers.Web3Provider(window.ethereum).getSigner();

3.3 Example of getting the signer object (in the FE for Elrond):

// ELROND provider:
import { ExtensionProvider } from "@elrondnetwork/erdjs/out";
const elrondSigner = ExtensionProvider.getInstance();

3.4 Example of getting the signer object (in the FE for Tron):

// Address is fetched from tronweb
(async () => {
  const addresses = await window.tronLink.tronWeb.request({
    method: "tron_requestAccounts",
  });
  const tronSigner = addresses[0];
})();

3.5 Example of getting the signer object (in the FE for Algorand):

import { typedAlgoSigner } from "xp.network/dist/helpers/algorand";
// Use the typedAlgoSigner function to get access to the Algorand signer
const algorandSigner = typedAlgoSigner();

3.6 Example of getting the signer object (in the FE for Tezos):

import { TempleWallet } from "@temple-wallet/dapp";
(async () => {
  try {
        const available = await TempleWallet.isAvailable();
        if (!available) {
            throw new Error("Temple Wallet is not installed");
        }
        const tezosSigner = new TempleWallet("bridge.xp.network");
    } catch (error) {
        console.error("Error:", error);
    }
})();

For the ways of connecting the wallets in the FE check-out our bridge repository