Gemini dollar

0x056fd409e1d7a124bd7017459dfea2f387b6d5cd Copy

ERC20

This contract is an ERC20 token.

Name Gemini dollar

Symbol GUSD

Decimals 2

Total Supply 11,539,982 GUSD

About

Gemini Dollar (GUSD) is a cryptocurrency and operates on the Ethereum platform. Gemini Dollar has a current supply of 309,478,288.65. The last known price of Gemini Dollar is 0.99172544 USD and is up 0.17 over the last 24 hours. It is currently trading on 29 active market(s) with $9,313,293.48 traded over the last 24 hours. More information can be found at https://gemini.com/dollar/.

Identical Contracts

The following contracts have identical source code.

ERC20Impl - 0x6704ba24b8640bccee6bf2fd276a6a1b8edf4ade

ERC20Store - 0xc42b14e49744538e3c239f8ae48a1eaaf35e68a0

Stats

Public Functions 14

Event Types 6

Code Size 37,448 bytes

Events (6)

Approval Event

Parameters

_owner	address
_spender	address
_value	uint256

CustodianChangeConfirmed Event

Parameters

_lockId	bytes32
_newCustodian	address

CustodianChangeRequested Event

Parameters

_lockId	bytes32
_msgSender	address
_proposedCustodian	address

ImplChangeConfirmed Event

Parameters

_lockId	bytes32
_newImpl	address

ImplChangeRequested Event

Parameters

_lockId	bytes32
_msgSender	address
_proposedImpl	address

Transfer Event

Parameters

_from	address
_to	address
_value	uint256

State Variables (8)

name Variable

string

symbol Variable

string

decimals Variable

uint8

erc20Impl Variable

address

custodian Variable

address

lockRequestCount Variable

uint256

implChangeReqs Variable

mapping(bytes32 => ImplChangeRequest)

Internal Variable

custodianChangeReqs Variable

mapping(bytes32 => CustodianChangeRequest)

Internal Variable

Functions Expand All Collapse All

requestCustodianChange

Parameters

Name	Type
_proposedCustodian	address

Properties

Visibility public

Mutability transaction

Requirements

_proposedCustodian must not be equal to UNKNOWN VALUE

Source Code

function requestCustodianChange(address _proposedCustodian)
  public
  returns (bytes32 lockId)
{
  require(_proposedCustodian != address(0));

  lockId = generateLockId();

  custodianChangeReqs[lockId] = CustodianChangeRequest({
    proposedNew: _proposedCustodian
  });

  emit CustodianChangeRequested(lockId, msg.sender, _proposedCustodian);
}

confirmCustodianChange

Parameters

Name	Type
_lockId	bytes32

Properties

Visibility public

Mutability transaction

Modifiers

onlyCustodian checks for the following:

custodian must be equal to the sender's address

Source Code

function confirmCustodianChange(bytes32 _lockId) public onlyCustodian {
  custodian = getCustodianChangeReq(_lockId);

  delete custodianChangeReqs[_lockId];

  emit CustodianChangeConfirmed(_lockId, custodian);
}

requestImplChange

Parameters

Name	Type
_proposedImpl	address

Properties

Visibility public

Mutability transaction

Requirements

_proposedImpl must not be equal to UNKNOWN VALUE

Source Code

function requestImplChange(address _proposedImpl)
  public
  returns (bytes32 lockId)
{
  require(_proposedImpl != address(0));

  lockId = generateLockId();

  implChangeReqs[lockId] = ImplChangeRequest({proposedNew: _proposedImpl});

  emit ImplChangeRequested(lockId, msg.sender, _proposedImpl);
}

confirmImplChange

Parameters

Name	Type
_lockId	bytes32

Properties

Visibility public

Mutability transaction

Modifiers

onlyCustodian checks for the following:

custodian must be equal to the sender's address

Source Code

function confirmImplChange(bytes32 _lockId) public onlyCustodian {
  erc20Impl = getImplChangeReq(_lockId);

  delete implChangeReqs[_lockId];

  emit ImplChangeConfirmed(_lockId, address(erc20Impl));
}

totalSupply

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function totalSupply() public view returns (uint256) {
  return erc20Impl.totalSupply();
}

balanceOf

Parameters

Name	Type
_owner	address

Properties

Visibility public

Mutability view

Source Code

function balanceOf(address _owner) public view returns (uint256 balance) {
  return erc20Impl.balanceOf(_owner);
}

transfer

Parameters

Name	Type
_to	address
_value	uint256

Properties

Visibility public

Mutability transaction

Source Code

function transfer(address _to, uint256 _value) public returns (bool success) {
  return erc20Impl.transferWithSender(msg.sender, _to, _value);
}

transferFrom

Parameters

Name	Type
_from	address
_to	address
_value	uint256

Properties

Visibility public

Mutability transaction

Source Code

function transferFrom(
  address _from,
  address _to,
  uint256 _value
) public returns (bool success) {
  return erc20Impl.transferFromWithSender(msg.sender, _from, _to, _value);
}

approve

Parameters

Name	Type
_spender	address
_value	uint256

Properties

Visibility public

Mutability transaction

Source Code

function approve(address _spender, uint256 _value)
  public
  returns (bool success)
{
  return erc20Impl.approveWithSender(msg.sender, _spender, _value);
}

allowance

Parameters

Name	Type
_owner	address
_spender	address

Properties

Visibility public

Mutability view

Source Code

function allowance(address _owner, address _spender)
  public
  view
  returns (uint256 remaining)
{
  return erc20Impl.allowance(_owner, _spender);
}

emitTransfer

Parameters

Name	Type
_from	address
_to	address
_value	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlyImpl checks for the following:

the sender's address must be equal to UNKNOWN VALUE

Source Code

function emitTransfer(
  address _from,
  address _to,
  uint256 _value
) public onlyImpl {
  emit Transfer(_from, _to, _value);
}

emitApproval

Parameters

Name	Type
_owner	address
_spender	address
_value	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlyImpl checks for the following:

the sender's address must be equal to UNKNOWN VALUE

Source Code

function emitApproval(
  address _owner,
  address _spender,
  uint256 _value
) public onlyImpl {
  emit Approval(_owner, _spender, _value);
}

increaseApproval

Parameters

Name	Type
_spender	address
_addedValue	uint256

Properties

Visibility public

Mutability transaction

Source Code

function increaseApproval(address _spender, uint256 _addedValue)
  public
  returns (bool success)
{
  return
    erc20Impl.increaseApprovalWithSender(msg.sender, _spender, _addedValue);
}

decreaseApproval

Parameters

Name	Type
_spender	address
_subtractedValue	uint256

Properties

Visibility public

Mutability transaction

Source Code

function decreaseApproval(address _spender, uint256 _subtractedValue)
  public
  returns (bool success)
{
  return
    erc20Impl.decreaseApprovalWithSender(
      msg.sender,
      _spender,
      _subtractedValue
    );
}

Internal Functions Expand All Collapse All

Internal functions are parts of the contract that can't be used directly, but instead are used by the public functions listed above.

internal ERC20ImplUpgradeable.getImplChangeReq

Parameters

Name	Type
_lockId	bytes32

Properties

Visibility private

Mutability view

Requirements

changeRequest.proposedNew must not be equal to UNKNOWN VALUE

Source Code

function getImplChangeReq(bytes32 _lockId)
  private
  view
  returns (ERC20Impl _proposedNew)
{
  ImplChangeRequest storage changeRequest = implChangeReqs[_lockId];

  // reject ‘null’ results from the map lookup
  // this can only be the case if an unknown `_lockId` is received
  require(changeRequest.proposedNew != address(0));

  return ERC20Impl(changeRequest.proposedNew);
}

internal CustodianUpgradeable.getCustodianChangeReq

Parameters

Name	Type
_lockId	bytes32

Properties

Visibility private

Mutability view

Requirements

changeRequest.proposedNew must not be equal to 0

Source Code

function getCustodianChangeReq(bytes32 _lockId)
  private
  view
  returns (address _proposedNew)
{
  CustodianChangeRequest storage changeRequest = custodianChangeReqs[_lockId];

  // reject ‘null’ results from the map lookup
  // this can only be the case if an unknown `_lockId` is received
  require(changeRequest.proposedNew != 0);

  return changeRequest.proposedNew;
}

internal LockRequestable.generateLockId

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Source Code

function generateLockId() internal returns (bytes32 lockId) {
  return
    keccak256(
      block.blockhash(block.number - 1),
      address(this),
      ++lockRequestCount
    );
}

Gemini dollar

ERC20

About link description

Identical Contracts

Stats

Events (6) keyboard_arrow_up

Approval Event

Parameters help Event parameters list the data that an event contains.

CustodianChangeConfirmed Event

Parameters help Event parameters list the data that an event contains.

CustodianChangeRequested Event

Parameters help Event parameters list the data that an event contains.

ImplChangeConfirmed Event

Parameters help Event parameters list the data that an event contains.

ImplChangeRequested Event

Parameters help Event parameters list the data that an event contains.

Transfer Event

Parameters help Event parameters list the data that an event contains.

State Variables (8) keyboard_arrow_up

name Variable

symbol Variable

decimals Variable

erc20Impl Variable

custodian Variable

lockRequestCount Variable

implChangeReqs Variable

custodianChangeReqs Variable

Functions Expand All Collapse All

requestCustodianChange keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Requirements help Requirements are checks that the function makes when it runs, and give you insight on what conditions are required for the function to succeed.

Source Code

confirmCustodianChange keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Modifiers help Modifiers are additions to a function that typically make various checks before the function is run.

onlyCustodian checks for the following:

Source Code

requestImplChange keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Requirements help Requirements are checks that the function makes when it runs, and give you insight on what conditions are required for the function to succeed.

Source Code

confirmImplChange keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Modifiers help Modifiers are additions to a function that typically make various checks before the function is run.

onlyCustodian checks for the following:

Source Code

totalSupply keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Source Code

balanceOf keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Source Code

transfer keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Source Code

transferFrom keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Source Code

approve keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Source Code

allowance keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Source Code

emitTransfer keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Modifiers help Modifiers are additions to a function that typically make various checks before the function is run.

onlyImpl checks for the following:

Source Code

About

Events (6)

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

State Variables (8)

requestCustodianChange

Parameters

Requirements

confirmCustodianChange

Parameters

Modifiers

requestImplChange

Parameters

Requirements

confirmImplChange

Parameters

Modifiers

totalSupply

Parameters

balanceOf

Parameters

transfer

Parameters

transferFrom

Parameters

approve

Parameters

allowance

Parameters

emitTransfer

Parameters

Modifiers

emitApproval

Parameters

Modifiers

increaseApproval

Parameters

decreaseApproval

Parameters

internal ERC20ImplUpgradeable.getImplChangeReq

Parameters

Requirements

internal CustodianUpgradeable.getCustodianChangeReq

Parameters

Requirements

internal LockRequestable.generateLockId

Parameters