Add ERC: Parametric Token - #1937
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| title: Parametric Token | ||
| description: An extension of ERC-20 enabling fungible tokens with account-specific mutable or immutable parameters and sub-accounts. | ||
| author: Alexander Zvezdin (@k2eno) | ||
| discussions-to: https://ethereum-magicians.org/t/erc-xxxx-parametric-token/29385 |
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| discussions-to: https://ethereum-magicians.org/t/erc-8378-parametric-token/29385 |
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This PR proposes a new ERC: Parametric Token – an extension of ERC-20 that enables fungible tokens to carry account-specific, mutable or immutable parameters, with built-in sub-account support.
Summary
Parametric tokens keep fungibility while allowing each account to hold its own state. Parameters travel with the token and update deterministically on transfer via pure functions (e.g., weighted average, max, or custom combine). The standard introduces:
Dependencies: ERC-20, ERC-165
Files added: ERCS/erc-xxxx.md
Reference Implementation
A Foundry repo with three fully-tested examples (Prediction, Tenure, Bundle) accompanies the draft. It includes all interfaces, parameter mutation logic, and comprehensive test suites covering core functionality, revert conditions, and NZS event emission.
Discussion Thread
https://ethereum-magicians.org/t/erc-xxxx-parametric-token/29385
The thread is active and seeks feedback on gas costs, parameter limits, sub-account deletion, NZS detection, and engine integration patterns.
Many thanks,
Alexander Zvezdin (@K2eno)