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Privacy Routing SDK

How to use privacy-routing-sdk

How to use privacy-routing-sdk

You can use privacy-routing-sdk to transfer any FRC-20 asset (including FRA) on Findora Smart Chain from Address A to Address B, and remove the link between the two addresses. Both addresses can be classical user address or contract address.
Note: Privacy Routing SDK can currently only be used on the Findora Forge Testnet. See network settings for RPC details and request Forge EVM testnet FRA tokens here.

Privacy Routing Overview

Below is a visual representation of the major flows when routing transactions which begins on the Findora EVM wallet through the Findora UTXO layer (to break the link between the sender and final Findora EVM wallet receiver).
Privacy Routing SDK Process Flow
Here is the process flow using the SDK's APIs:
Privacy Routing API Call Flow

Asset Type on Findora Native Chain

  • BAR
    • Transparent Asset
  • ABAR
    • Shielded Asset ({amount, asset type, address} masked)

Simple Steps to Use

First clone and add the SDK to your project.
Import SDK
// Use appropriate ways to importing the privacy-routing-sdk
import { Sdk } from "privacy-routing-sdk";
const { Sdk } = require("privacy-routing-sdk");
Initiate SDK
import { Sdk } from "privacy-routing-sdk";
​
const ENV_CONFIG = {
hostUrl: "findora RPC",
};
​
// Initiating the SDK configuration
await Sdk.init(ENV_CONFIG);

Supported Tokens

  • FRC20 (FRA token)
  • FRC20 (Customized token)
    • any FRC20 token on Findora EVM

Findora EVM -> Findora EVM Transaction

Using privacy-routing-sdk for a complete confidential cross chain transaction by the following steps,
  • (1) From EVM compatible chain to Findora Native Chain
    • Bridging FRC20(FRA token) to Findora Native Chain
    await evm.transfer.fraToBar({
    bridgeAddress: simBridgeAddress, // bridge contract address
    recipientAddress: "0x.....", // wallet account address
    amount: "100", // send amount
    });
    • Bridging FRC20(Customized token) to Findora Native Chain
    /*
    Parameters
    bridgeAddress: simBridge contract address
    tokenAddress: FRC20 token address
    totalAmount: send amount
    recipientAddress: wallet account address
    */
    await evm.services.approveToken(tokenAddress, simBridgeAddress, tokenAmount);
    return await evm.transfer.frc20ToBar({
    bridgeAddress: simBridgeAddress,
    recipientAddress,
    tokenAddress,
    tokenAmount,
    });
  • (2) Converting Assets from BAR to ABAR in Findora Native Chain （entering confidential cycle）
import { findora } from "privacy-routing-sdk";
​
/**
Parameters
sids: consumable utxo sids
*/
const walletWrap = await findora.keypair.getWallet();
findora.transfer.barToAbar(walletWrap, sids);
  • (3) Converting Assets from ABAR to BAR in Fidnora Native Chain （leaving confidential cycle）
import { findora } from "privacy-routing-sdk";
​
/**
Parameters
commitments: consumable Abar utxo sids
*/
const walletWrap = await findora.keypair.getWallet();
findora.transferabarToBar(
walletWrap.anonWallet,
walletWrap.walletEnd,
commitments
);
  • (4) Bridging from Findora Native Chain to EVM Compatible chain
    • Bridging FRC20 (FRA token) to Findora EVM
    import { findora } from "privacy-routing-sdk";
    ​
    const walletWrap = await findora.keypair.getWallet();
    await findora.transfer.barToEVM(
    walletWrap.walletEnd,
    "100", // token amount
    recipientAddress, // recipient's address
    "",
    "",
    false
    );
    • Bridging FRC20 (Customized token) to Findora EVM
    import { findora, evm } from "privacy-routing-sdk";
    ​
    const walletWrap = await findora.keypair.getWallet();
    const assetCode = await evm.services.getAssetCode(
    prismBridgeAddress,
    tokenAddress, // FRC20 token address
    findoraNetworkRpcUrl
    );
    ​
    await findora.transfer.barToEVM(
    walletWrap.walletEnd,
    "100", // token amount
    recipientAddress, // recipient's address
    assetCode,
    "",
    false
    );

Boilerplate settings

import { Sdk } from 'privacy-routing-sdk';
import Web3 from 'web3';
​
export const ENV_CONFIG = {
hostUrl: 'https://prod-forge.prod.findora.org',
feeServerUrl: 'https://forge.invisiblex.org/api/fee',
configServerUrl: 'https://columbus-config.s3.us-west-2.amazonaws.com/columbus_config_forge.json',
navticeExplorerUrl: 'https://forge.findorascan.io/',
};
​
export const FINDORA_EVM_CHAIN_ID = '2154';
​
Sdk.init({ ...ENV_CONFIG, web3: new Web3(Web3.givenProvider) });
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Last modified 2mo ago