DataUniqueness.sol

Library to store data without repetition, assigning an id to it if new or reusing existing one if already stored

function addIdOrGetExisting(bytes data, mapping(bytes32 => uint256) _hashToIds, uint256 existingIds) internal returns (uint256 id, bool isNew)

Stores data without repetition, assigning an id to it if new or reusing existing one if already stored

Name	Type	Description
data	bytes	raw bytes, abi.encode() a value to be hashed
_ hashToIds	mapping(bytes32 => uint256)	storage ref to the mapping of hash -> data id
existingIds	uint256	amount of distinct data stored.

Name

Type

Description

data

bytes

raw bytes, abi.encode() a value to be hashed

hashToIds

mapping(bytes32 => uint256)

storage ref to the mapping of hash -> data id

existingIds

uint256

amount of distinct data stored.

Name	Type	Description
id	uint256	new sequential id if new data, reused id if not new
isNew	bool	True if a new id was generated, signaling the value was stored in _hashToIds. False if id is reused and data was not stored