Add ERC: Dual-Mode Fungible Tokens

[0xRowan]

Summary

This PR proposes a new ERC standard for dual-mode fungible tokens that support both transparent (ERC-20) and privacy-preserving (zk-SNARK) modes within a single token.

Motivation

Current privacy solutions for tokens require trade-offs:

• Wrapper-based: Creates two separate tokens, splits liquidity
• Protocol-level: Requires blockchain forks, multi-year coordination

This standard provides an integrated approach specifically for new token deployments that want privacy as a core feature from day one.

Key Features

• Unified Token Economics: One token address, no liquidity fragmentation
• Seamless Mode Switching: Users convert between public and privacy modes
• Full ERC-20 Compatibility: Works with existing DeFi without modification
• Transparent Supply Tracking: Prevents hidden inflation
• Application-Layer Deployment: Deploy today on any EVM chain

Community Discussion

• Ethereum Magicians: https://ethereum-magicians.org/t/erc-8085-dual-mode-fungible-tokens/26592

Current Status

• [x] Specification complete
• [x] Interface definitions with detailed event comments
• [x] Security considerations documented
• [x] Community discussion initiated
• [ ] Reference implementation (planned after initial feedback)
• [ ] Test cases (planned after initial feedback)

Next Steps

I will add the reference implementation and test cases after receiving initial community feedback on the specification.

[eip-review-bot]

File ERCS/erc-8085.md

Requires 1 more reviewers from @g11tech, @samwilsn, @xinbenlv

[github-actions[bot]]

The commit e8a5c7d39c15cba6461c84ca8f28589d2d58bb83 (as a parent of 1d16586d2a2b6837f12d1fc3414cfda212f534c0) contains errors. Please inspect the Run Summary for details.

[0xRowan]

Closing this PR. ERC-8085 has been moved to PR #1359 along with its dependency ERC-8086.