Developers Forum for XinFin XDC Network: Minisoft

NUVOWallet Digital Trust Frameworks Enables Financial and Healthcare Inclusion

Minisoft — Tue, 12 Aug 2025 18:14:24 +0000

NUVO Wallet addresses the significant challenge of financial and healthcare exclusion in rural India, particularly for the 447 million women who lack access to digital services. Recognizing that over 54% of women in this demographic do not own a smartphone, NUVO has developed a low-cost, patent-pending solution called NUVO SmartCards. These SmartCards provide digital enablement to the "last mile," offering a practical and affordable alternative to smartphones for managing essential personal data, thus bridging the digital divide and enabling access to critical services.

The platform promotes digital empowerment through a robust trust framework built on blockchain technology. Using a consent-based data exchange protocol, NUVO provides individuals with a personalized digital wallet to securely manage their identity, academic, work, financial, and health data. This system utilizes blockchain-verifiable credentials to ensure data integrity, authenticity, and immutability. By giving users complete ownership and control over their personal data, NUVO's self-sovereign identity approach enhances privacy and security.

For healthcare, the wallet links with the Ayushman Bharat Health Account (ABHA-ID), enabling individuals to securely store and share their medical records with service providers. Similarly, for financial inclusion, the platform allows individuals to build verifiable credit histories, skills, and asset ownership records, which can be used to access loans and other financial services. This system helps to build trust and stronger relationships between individuals and service providers by providing a verifiable record of their history, all while safeguarding privacy and dignity.

https://nuvowallet.io

NUVOWallet Introduces Trust Framework with Soul-Bound Tokens (SBT) and Verifiable Credentials on XDC Mainnet

Minisoft — Tue, 12 Aug 2025 18:09:28 +0000

Link: https://youtu.be/8P3lAlYw0Go

Soulbound Tokens (SBTs) are a type of non-transferable digital token that are permanently tied to a specific blockchain wallet, often referred to as a "Soul." Unlike standard cryptocurrencies or non-fungible tokens (NFTs), which are designed to be bought, sold, and traded, SBTs cannot be transferred to another user.

SBTs are intended to represent a person's unique identity, credentials, and reputation in the digital world. This can include things like educational degrees, professional certifications, work history, and even medical records.

The non-transferable nature of SBTs makes them useful for creating a verifiable and authentic digital identity, helping to prevent fraud and build trust in decentralized applications and communities.

XDC Token SmartContract
https://xdcscan.com/address/0x113b3fb9d3ab4d02057313f9729b5f2f92491313

https://nuvowallet.io

Contract Verfication Not Working on XDC Mainnet

Minisoft — Tue, 05 Aug 2025 12:02:49 +0000

Unable to verify contract on XDC Mainnet, while the same contract is getting deployed on Testnet and Verification works.

Scenario: Using Remix to Deploy ERC20 Contract, Following is the SmartContract.

// SPDX-License-Identifier: MIT
// Compatible with OpenZeppelin Contracts ^5.0.0
pragma solidity ^0.8.0;`

import {AccessControl} from "@openzeppelin/contracts@5.3.0/access/AccessControl.sol";
import {ERC20} from "@openzeppelin/contracts@5.3.0/token/ERC20/ERC20.sol";
import {ERC20Burnable} from "@openzeppelin/contracts@5.3.0/token/ERC20/extensions/ERC20Burnable.sol";

/// @custom:security-contact nuvowalletio@outlook.com
contract tokenise000020 is ERC20, ERC20Burnable, AccessControl {

    bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");

    constructor(address admin, address minter, string memory name, string memory ticker)
        ERC20(name, ticker)
    {
        _grantRole(DEFAULT_ADMIN_ROLE, admin);
        _grantRole(MINTER_ROLE, minter);
    }

    function TokenMint(address credit, uint256 amount) public onlyRole(MINTER_ROLE) {
      _mint(credit, amount);
    }
    function TokenTransfer(address debit, address credit, uint256 amount) public onlyRole(MINTER_ROLE) {
      _transfer(debit, credit, amount);
    }
    function TokenBurn(address debit, uint256 amount) public onlyRole(MINTER_ROLE) {
      _burn(debit, amount);
    }
}

Contract Verification Method:
https://www.xdc.dev/openscan/how-to-verify-your-smart-contract-built-on-the-xdc-network-via-standard-input-json-on-xdcscan-powered-by-blocksscanopenscan-2j93

Testnet:
Compiler 0.8.30+commit.73712a01, evm: prague
Contract is Deployed, Contract Is Verified
https://testnet.xdcscan.com/address/0xaF25D83767fdCa9628FD1034feA905fDe9d9B25a

Mainnet:
Compiler 0.8.30+commit.73712a01, evm: prague
Contract cannot be deployed, Gas Estimation Error

Downgrade EVM version
Compiler 0.8.30+commit.73712a01, evm: london
Contract is Deployed, Contract Cannot be Verified
https://xdcscan.com/address/0x4857288174a307C5974b5C9749986A5fBCda95A2

Any help / advise how to resolve this ?