UniqueIdentity
UniqueIdentity
Deployment on Ethereum mainnet:
https://etherscan.io/address/0xba0439088dc1e75F58e0A7C107627942C15cbb41
UniqueIdentity is an ERC1155-compliant contract for representing the identity verification status of addresses.
SIGNER_ROLE
bytes32 SIGNER_ROLE
ID_TYPE_0
uint256 ID_TYPE_0
ID_TYPE_1
uint256 ID_TYPE_1
ID_TYPE_2
uint256 ID_TYPE_2
ID_TYPE_3
uint256 ID_TYPE_3
ID_TYPE_4
uint256 ID_TYPE_4
ID_TYPE_5
uint256 ID_TYPE_5
ID_TYPE_6
uint256 ID_TYPE_6
ID_TYPE_7
uint256 ID_TYPE_7
ID_TYPE_8
uint256 ID_TYPE_8
ID_TYPE_9
uint256 ID_TYPE_9
ID_TYPE_10
uint256 ID_TYPE_10
MINT_COST_PER_TOKEN
uint256 MINT_COST_PER_TOKEN
nonces
mapping(address => uint256) nonces
We include a nonce in every hashed message, and increment the nonce as part of a state-changing operation, so as to prevent replay attacks, i.e. the reuse of a signature.
supportedUIDTypes
mapping(uint256 => bool) supportedUIDTypes
initialize
function initialize(address owner, string uri) public
__UniqueIdentity_init
function __UniqueIdentity_init(address owner) internal
__UniqueIdentity_init_unchained
function __UniqueIdentity_init_unchained(address owner) internal
setSupportedUIDTypes
function setSupportedUIDTypes(uint256[] ids, bool[] values) public
name
function name() public pure returns (string)
Gets the token name.
Return Values
| Name | Type | Description |
|---|---|---|
| [0] | string | string representing the token name |
symbol
function symbol() public pure returns (string)
Gets the token symbol.
Return Values
| Name | Type | Description |
|---|---|---|
| [0] | string | string representing the token symbol |
mint
function mint(uint256 id, uint256 expiresAt, bytes signature) public payable
Mint a new UniqueIdentity token to the msgSender
Parameters
| Name | Type | Description |
|---|---|---|
| id | uint256 | The id representing the KYC type of the UniqueIdentity |
| expiresAt | uint256 | The expiration time of the signature |
| signature | bytes | An EIP-191 signature of the corresponding mint params: account, id, expiresAt, address(this), nonces[account], block.chainid from an address with the SIGNER_ROLE. |
mintTo
function mintTo(address recipient, uint256 id, uint256 expiresAt, bytes signature) public payable
Mint a new UniqueIdentity token to the recipient
Parameters
| Name | Type | Description |
|---|---|---|
| recipient | address | The recipient address to be minted to. |
| id | uint256 | The id representing the KYC type of the UniqueIdentity |
| expiresAt | uint256 | The expiration time of the signature |
| signature | bytes | An EIP-191 signature of the corresponding mintTo params: (account, recipient, id, expiresAt, address(this), nonces[account], block.chainid) from an address with the SIGNER_ROLE. |
_mintTo
function _mintTo(address mintToAddress, uint256 id) private
burn
function burn(address account, uint256 id, uint256 expiresAt, bytes signature) public
Burn a UniqueIdentity token of id from the account
Parameters
| Name | Type | Description |
|---|---|---|
| account | address | The account which currently owns the UID |
| id | uint256 | The id representing the KYC type of the UniqueIdentity |
| expiresAt | uint256 | The expiration time of the signature |
| signature | bytes | An EIP-191 signature of the corresponding burn params: (account, id, expiresAt, address(this), nonces[account], block.chainid) from an address with the SIGNER_ROLE. |
_beforeTokenTransfer
function _beforeTokenTransfer(address operator, address from, address to, uint256[] ids, uint256[] amounts, bytes data) internal
_See {ERC1155-_beforeTokenTransfer}.
Requirements:
- the contract must not be paused._
onlySigner
modifier onlySigner(address account, uint256 id, uint256 expiresAt, bytes signature)
onlySignerMintTo
modifier onlySignerMintTo(address mintToAddress, uint256 id, uint256 expiresAt, bytes signature)
incrementNonce
modifier incrementNonce(address account)