💀Soulbound Tokens

The SBT

You can think of your Impact Identity as a climate passport, where your impact with Return will be tracked and represented as your on-chain carbon identity. The more you do, the more it evolves!

The Smart Contract

The Return Impact Identity is an ERC-721 token locked to a single address, corresponding to the climate impact of that address. Impact Identities are non-transferable, and evolve according to the impact of the owner's wallet.

Publicly Callable Functions

function getTotalSBTOffset(uint sbtID) returns (uint totalOffset)

Parameter	Data Type	Description
sbtID	uint	ERC-721 ID of the Return Impact Identity to be queried
totalOffset	uint	Return Value: Total offset of SBT across all sources

getTotalSBTOffset queries the Return Pool Manager contract to find all associated NFT's and returns the sum of their offset amounts.

function calculateTier(uint sbtID) returns (uint tier)

Parameter	Data Type	Description
sbtID	uint	ERC-721 ID of Return Impact Identity to be queried
tier	uint	Calculated tier of queried SBT from total offset amount