Weighted NFTs

[tenthirtyone]

Preamble

eip: 874
title: Weighted NFTs
author: Alex Sherbuck Alex@igave.io
type: Standard Track
category: ERC
status: Draft
created: 2018-02-06

Summary

Not all NFTs are created equal. Nothing exists to distinguish one NFT from another. Weight allows a DAO or other external actors to recognize some value for unique asset holdings.

Motivation

This allows DAOs to form based on asset/NFT holdings instead of just ERC-20 token holdings. Asset holders may decide how to set their token weight.

Specification

The Weighted Digital Asset Registry is an extension for ERC-821 that tracks asset weight. This follows the standard set in ERC821 and adds:

Weighted DAR

Extension to ERC-821

totalWeight

function totalWeight() public view returns (uint256);
Returns the total weight tracked by the DAR

isWeighted

function isWeighted() public view returns (bool);
This method returns true.

weightOfAsset

function weightOfAsset(uint256 assetId) public view returns (uint64);
Returns the total weight of an individual asset.

weightOfHolder

function weightOfHolder(address holder) public view returns (uint256);
Returns the total weight of the assets controlled by the holder.

changeWeight

function changeWeight(uint256 assetId, uint64 weight) public;
Changes the weight of the asset to the given value.

Events

event TransferWeight(
    address indexed from,
    address indexed to,
    uint256 indexed assetId,
    uint64 weight
  );
event ChangeWeight(
    uint256 indexed assetId,
    uint64 weight
  );

DAR Adapter

An adapter that exposes a balanceOf.

voteWeightAddress

function voteWeightAddress() public view returns (address);
Returns the address of the Weighted DAR.

balanceOf

function balanceOf(address holder) public view returns (uint256);
Calls the weightOfHolder function of the Weighted DAR.

Implementation

This will be updated to the most recent ERC-721 standard. Update: Standard is settled. Getting to work

Weighted Digital Asset Registry - w/ DAO voting

Rationale

Including an adapter for the DAO to reference holder weight minimizes the impact on current DAO code that references an ERC-20's balanceOf

Copyright

Copyright and related rights waived via CC0.

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[axic]

What is a DAR?

[tenthirtyone]

DAR was the 821 standard that was contentious with 721 before everyone decide to merge 821 Digital Asset Registry into 721 a while back.

[axic]

@tenthirtyone are you still interested in pursuing this ERC?

[tenthirtyone]

@axic Yes, we're doing things over at heritage.aero with it

[github-actions]

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[github-actions]

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