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---
eip: 7849
title: Fungible Token with gas rebates
description: Built-in gas rebates, secure signature validation, and optimized transfer mechanisms.
author: Amitesh Gautam (@blockchainDevAmitesh) <[email protected]>
discussions-to: https://ethereum-magicians.org/t/erc-7849-fungible-token-with-gas-rebates/22356
status: Draft
type: Standards Track
category: ERC
created: 2025-01-01
description: A new fungible token standard with built-in gas rebates, secure signature validation using [EIP-712](https://eips.ethereum.org/EIPS/eip-712), and optimized transfer mechanisms.
---

## Abstract

EIP7849 introduces a new fungible token standard focused on security, efficiency, and interoperability. It extends traditional [ERC-20](https://eips.ethereum.org/EIPS/eip-20) functionality with built-in gas rebates, secure signature validation using [EIP-712](https://eips.ethereum.org/EIPS/eip-712), and optimized transfer mechanisms. The standard includes protections against common attack vectors while maintaining full compatibility with existing token interfaces.
EIP-7849 introduces a new fungible token standard focused on security, efficiency, and interoperability. It extends traditional [ERC-20](./erc-20.md) functionality with built-in gas rebates, secure signature validation using [EIP-712](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md), and optimized transfer mechanisms. The standard includes protections against common attack vectors while maintaining full compatibility with existing token interfaces.

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## Motivation

Current fungible token standards lack built-in security features and gas optimization mechanisms. EIP7849 addresses these limitations by incorporating:
Current fungible token standards lack built-in security features and gas optimization mechanisms. EIP-7849 addresses these limitations by incorporating:

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- Native gas rebate system to reduce transaction costs
- [EIP-712](https://eips.ethereum.org/EIPS/eip-712) compliant signatures for gasless approvals
- [EIP-712](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md) compliant signatures for gasless approvals

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- Strong security measures against common vulnerabilities
- Efficient state management and error handling

## Specification

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 and RFC 8174.

## Token Details

### Core Variables
- `name`: Token name
- `symbol`: Token symbol
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### Features
- Gas rebate system
- [EIP-712](https://eips.ethereum.org/EIPS/eip-712) signature validation
- [EIP-712](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md) signature validation

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- Nonce tracking for replay protection

### Functions
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- Returns: `bool`

**`permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s)`**
- Processes gasless approvals using [EIP-712](https://eips.ethereum.org/EIPS/eip-712) signatures
- Processes gasless approvals using [EIP-712](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md) signatures

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- Validates signature and deadline
- No return value

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## Rationale

The design choices in EIP7849 prioritize:
The design choices in EIP-7849 prioritize:

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129 | The design choices in EIP-7849 prioritize:
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1. Security through custom error handling and signature validation
2. Gas efficiency via rebate mechanisms
3. Interoperability through standard [EIP-712](https://eips.ethereum.org/EIPS/eip-712) implementation
3. Interoperability through standard [EIP-712](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md) implementation

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4. User experience through gasless approvals

## Backwards Compatibility

EIP7849 maintains full backwards compatibility with [ERC-20](https://eips.ethereum.org/EIPS/eip-20) while adding enhanced functionality.
EIP-7849 maintains full backwards compatibility with [ERC-20](./erc-20.md) while adding enhanced functionality.

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## Security Considerations

- Implements nonce tracking for signature validation
- Uses custom errors for efficient error handling
- Includes checks against zero-address transfers
- Limits gas rebates to prevent abuse
- Validates [EIP-712](https://eips.ethereum.org/EIPS/eip-712) signatures for permit operations
- Validates [EIP-712](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md) signatures for permit operations

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## Copyright

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