Contract Address Details

0x5B2C9E7932B08D8F2Ce70ef9E5c98528256f9aB4

Contract Name
GrandaMento
Creator
0xf3eb91–a79239 at 0xdbefeb–706500
Balance
0 CELO ( )
Tokens
Fetching tokens...
Transactions
Transfers
Gas Used
Last Balance Update
10405323
This contract has been verified via Sourcify. View contract in Sourcify repository
Contract name:
GrandaMento




Optimization enabled
false
Compiler version
v0.5.13+commit.5b0b510c




EVM Version
istanbul




Verified at
2021-09-23 21:03:20.904288Z

Contract source code

pragma solidity ^0.5.13;
import "openzeppelin-solidity/contracts/math/SafeMath.sol";
import "openzeppelin-solidity/contracts/ownership/Ownable.sol";
import "../common/FixidityLib.sol";
import "../common/Initializable.sol";
import "../common/UsingRegistry.sol";
import "../common/interfaces/ICeloVersionedContract.sol";
import "../common/libraries/ReentrancyGuard.sol";
import "../stability/interfaces/IStableToken.sol";
/**
* @title Facilitates large exchanges between CELO stable tokens.
*/
contract GrandaMento is
ICeloVersionedContract,
Ownable,
Initializable,
UsingRegistry,
ReentrancyGuard
{
using FixidityLib for FixidityLib.Fraction;
using SafeMath for uint256;
// Emitted when a new exchange proposal is created.
event ExchangeProposalCreated(
uint256 indexed proposalId,
address indexed exchanger,
string stableTokenRegistryId,
uint256 sellAmount,
uint256 buyAmount,
bool sellCelo
);
// Emitted when an exchange proposal is approved by the approver.
event ExchangeProposalApproved(uint256 indexed proposalId);
// Emitted when an exchange proposal is cancelled.
event ExchangeProposalCancelled(uint256 indexed proposalId);
// Emitted when an exchange proposal is executed.
event ExchangeProposalExecuted(uint256 indexed proposalId);
// Emitted when the approver is set.
event ApproverSet(address approver);
// Emitted when maxApprovalExchangeRateChange is set.
event MaxApprovalExchangeRateChangeSet(uint256 maxApprovalExchangeRateChange);
// Emitted when the spread is set.
event SpreadSet(uint256 spread);
// Emitted when the veto period in seconds is set.
event VetoPeriodSecondsSet(uint256 vetoPeriodSeconds);
// Emitted when the exchange limits for a stable token are set.
event StableTokenExchangeLimitsSet(
string stableTokenRegistryId,
uint256 minExchangeAmount,
uint256 maxExchangeAmount
);
enum ExchangeProposalState { None, Proposed, Approved, Executed, Cancelled }
struct ExchangeLimits {
// The minimum amount of an asset that can be exchanged in a single proposal.
uint256 minExchangeAmount;
// The maximum amount of an asset that can be exchanged in a single proposal.
uint256 maxExchangeAmount;
}
struct ExchangeProposal {
// The exchanger/proposer of the exchange proposal.
address payable exchanger;
// The stable token involved in this proposal. This is stored rather than
// the stable token's registry ID in case the contract address is changed
// after a proposal is created, which could affect refunding or burning the
// stable token.
address stableToken;
// The state of the exchange proposal.
ExchangeProposalState state;
// Whether the exchanger is selling CELO and buying stableToken.
bool sellCelo;
// The amount of the sell token being sold. If a stable token is being sold,
// the amount of stable token in "units" is stored rather than the "value."
// This is because stable tokens may experience demurrage/inflation, where
// the amount of stable token "units" doesn't change with time, but the "value"
// does. This is important to ensure the correct inflation-adjusted amount
// of the stable token is transferred out of this contract when a deposit is
// refunded or an exchange selling the stable token is executed.
// See StableToken.sol for more details on what "units" vs "values" are.
uint256 sellAmount;
// The amount of the buy token being bought. For stable tokens, this is
// kept track of as the value, not units.
uint256 buyAmount;
// The price of CELO quoted in stableToken at the time of the exchange proposal
// creation. This is the price used to calculate the buyAmount. Used for a
// safety check when an approval is being made that the price isn't wildly
// different. Recalculating buyAmount is not sufficient because if a stable token
// is being sold that has demurrage enabled, the original value when the stable
// tokens were deposited cannot be calculated.
uint256 celoStableTokenExchangeRate;
// The veto period in seconds at the time the proposal was created. This is kept
// track of on a per-proposal basis to lock-in the veto period for a proposal so
// that changes to the contract's vetoPeriodSeconds do not affect existing
// proposals.
uint256 vetoPeriodSeconds;
// The timestamp (`block.timestamp`) at which the exchange proposal was approved
// in seconds. If the exchange proposal has not ever been approved, is 0.
uint256 approvalTimestamp;
}
// The address with the authority to approve exchange proposals.
address public approver;
// The maximum allowed change in the CELO/stable token price when an exchange proposal
// is being approved relative to the rate when the exchange proposal was created.
FixidityLib.Fraction public maxApprovalExchangeRateChange;
// The percent fee imposed upon an exchange execution.
FixidityLib.Fraction public spread;
// The period in seconds after an approval during which an exchange proposal can be vetoed.
uint256 public vetoPeriodSeconds;
// The minimum and maximum amount of the stable token that can be minted or
// burned in a single exchange. Indexed by the stable token registry identifier string.
mapping(string => ExchangeLimits) public stableTokenExchangeLimits;
// State for all exchange proposals. Indexed by the exchange proposal ID.
mapping(uint256 => ExchangeProposal) public exchangeProposals;
// An array containing a superset of the IDs of exchange proposals that are currently
// in the Proposed or Approved state. Intended to allow easy viewing of all active
// exchange proposals. It's possible for a proposal ID in this array to no longer be
// active, so filtering is required to find the true set of active proposal IDs.
// A superset is kept because exchange proposal vetoes, intended to be done
// by Governance, effectively go through a multi-day timelock. If the veto
// call was required to provide the index in an array of activeProposalIds to
// remove corresponding to the vetoed exchange proposal, the timelock could result
// in the provided index being stale by the time the veto would be executed.
// Alternative approaches exist, like maintaining a linkedlist of active proposal
// IDs, but this approach was chosen for its low implementation complexity.
uint256[] public activeProposalIdsSuperset;
// Number of exchange proposals that have ever been created. Used for assigning
// an exchange proposal ID to a new proposal.
uint256 public exchangeProposalCount;
/**
* @notice Reverts if the sender is not the approver.
*/
modifier onlyApprover() {
require(msg.sender == approver, "Sender must be approver");
_;
}
/**
* @notice Sets initialized == true on implementation contracts.
* @param test Set to true to skip implementation initialization.
*/
constructor(bool test) public Initializable(test) {}
/**
* @notice Returns the storage, major, minor, and patch version of the contract.
* @return The storage, major, minor, and patch version of the contract.
*/
function getVersionNumber() external pure returns (uint256, uint256, uint256, uint256) {
return (1, 1, 0, 0);
}
/**
* @notice Used in place of the constructor to allow the contract to be upgradable via proxy.
* @param _registry The address of the registry.
* @param _approver The approver that has the ability to approve exchange proposals.
* @param _maxApprovalExchangeRateChange The maximum allowed change in CELO price
* between an exchange proposal's creation and approval.
* @param _spread The spread charged on exchanges.
* @param _vetoPeriodSeconds The length of the veto period in seconds.
*/
function initialize(
address _registry,
address _approver,
uint256 _maxApprovalExchangeRateChange,
uint256 _spread,
uint256 _vetoPeriodSeconds
) external initializer {
_transferOwnership(msg.sender);
setRegistry(_registry);
setApprover(_approver);
setMaxApprovalExchangeRateChange(_maxApprovalExchangeRateChange);
setSpread(_spread);
setVetoPeriodSeconds(_vetoPeriodSeconds);
}
/**
* @notice Creates a new exchange proposal and deposits the tokens being sold.
* @dev Stable token value amounts are used for the sellAmount, not unit amounts.
* @param stableTokenRegistryId The string registry ID for the stable token
* involved in the exchange.
* @param sellAmount The amount of the sell token being sold.
* @param sellCelo Whether CELO is being sold.
* @return The proposal identifier for the newly created exchange proposal.
*/
function createExchangeProposal(
string calldata stableTokenRegistryId,
uint256 sellAmount,
bool sellCelo
) external nonReentrant returns (uint256) {
address stableToken = registry.getAddressForStringOrDie(stableTokenRegistryId);
// Gets the price of CELO quoted in stableToken.
uint256 celoStableTokenExchangeRate = getOracleExchangeRate(stableToken).unwrap();
// Using the current oracle exchange rate, calculate what the buy amount is.
// This takes the spread into consideration.
uint256 buyAmount = getBuyAmount(celoStableTokenExchangeRate, sellAmount, sellCelo);
// Create new scope to prevent a stack too deep error.
{
// Get the minimum and maximum amount of stable token than can be involved
// in the exchange. This reverts if exchange limits for the stable token have
// not been set.
(uint256 minExchangeAmount, uint256 maxExchangeAmount) = getStableTokenExchangeLimits(
stableTokenRegistryId
);
// Ensure that the amount of stableToken being bought or sold is within
// the configurable exchange limits.
uint256 stableTokenExchangeAmount = sellCelo ? buyAmount : sellAmount;
require(
stableTokenExchangeAmount <= maxExchangeAmount &&
stableTokenExchangeAmount >= minExchangeAmount,
"Stable token exchange amount not within limits"
);
}
// Deposit the assets being sold.
IERC20 sellToken = sellCelo ? getGoldToken() : IERC20(stableToken);
require(
sellToken.transferFrom(msg.sender, address(this), sellAmount),
"Transfer in of sell token failed"
);
// Record the proposal.
// Add 1 to the running proposal count, and use the updated proposal count as
// the proposal ID. Proposal IDs intentionally start at 1.
exchangeProposalCount = exchangeProposalCount.add(1);
// For stable tokens, the amount is stored in units to deal with demurrage.
uint256 storedSellAmount = sellCelo
? sellAmount
: IStableToken(stableToken).valueToUnits(sellAmount);
exchangeProposals[exchangeProposalCount] = ExchangeProposal({
exchanger: msg.sender,
stableToken: stableToken,
state: ExchangeProposalState.Proposed,
sellCelo: sellCelo,
sellAmount: storedSellAmount,
buyAmount: buyAmount,
celoStableTokenExchangeRate: celoStableTokenExchangeRate,
vetoPeriodSeconds: vetoPeriodSeconds,
approvalTimestamp: 0 // initial value when not approved yet
});
// StableToken.unitsToValue (called within getSellTokenAndSellAmount) can
// overflow for very large StableToken amounts. Call it here as a sanity
// check, so that the overflow happens here, blocking proposal creation
// rather than when attempting to execute the proposal, which would lock
// funds in this contract.
getSellTokenAndSellAmount(exchangeProposals[exchangeProposalCount]);
// Push it into the array of active proposals.
activeProposalIdsSuperset.push(exchangeProposalCount);
// Even if stable tokens are being sold, the sellAmount emitted is the "value."
emit ExchangeProposalCreated(
exchangeProposalCount,
msg.sender,
stableTokenRegistryId,
sellAmount,
buyAmount,
sellCelo
);
return exchangeProposalCount;
}
/**
* @notice Approves an existing exchange proposal.
* @dev Sender must be the approver. Exchange proposal must be in the Proposed state.
* @param proposalId The identifier of the proposal to approve.
*/
function approveExchangeProposal(uint256 proposalId) external nonReentrant onlyApprover {
ExchangeProposal storage proposal = exchangeProposals[proposalId];
// Ensure the proposal is in the Proposed state.
require(proposal.state == ExchangeProposalState.Proposed, "Proposal must be in Proposed state");
// Ensure the change in the current price of CELO quoted in the stable token
// relative to the value when the proposal was created is within the allowed limit.
FixidityLib.Fraction memory currentRate = getOracleExchangeRate(proposal.stableToken);
FixidityLib.Fraction memory proposalRate = FixidityLib.wrap(
proposal.celoStableTokenExchangeRate
);
(FixidityLib.Fraction memory lesserRate, FixidityLib.Fraction memory greaterRate) = currentRate
.lt(proposalRate)
? (currentRate, proposalRate)
: (proposalRate, currentRate);
FixidityLib.Fraction memory rateChange = greaterRate.subtract(lesserRate).divide(proposalRate);
require(
rateChange.lte(maxApprovalExchangeRateChange),
"CELO exchange rate is too different from the proposed price"
);
// Set the time the approval occurred and change the state.
proposal.approvalTimestamp = block.timestamp;
proposal.state = ExchangeProposalState.Approved;
emit ExchangeProposalApproved(proposalId);
}
/**
* @notice Cancels an exchange proposal.
* @dev Only callable by the exchanger if the proposal is in the Proposed state
* or the owner if the proposal is in the Approved state.
* @param proposalId The identifier of the proposal to cancel.
*/
function cancelExchangeProposal(uint256 proposalId) external nonReentrant {
ExchangeProposal storage proposal = exchangeProposals[proposalId];
// Require the appropriate state and sender.
// This will also revert if a proposalId is given that does not correspond
// to a previously created exchange proposal.
if (proposal.state == ExchangeProposalState.Proposed) {
require(proposal.exchanger == msg.sender, "Sender must be exchanger");
} else if (proposal.state == ExchangeProposalState.Approved) {
require(isOwner(), "Sender must be owner");
} else {
revert("Proposal must be in Proposed or Approved state");
}
// Mark the proposal as cancelled. Do so prior to refunding as a measure against reentrancy.
proposal.state = ExchangeProposalState.Cancelled;
// Get the token and amount that will be refunded to the proposer.
(IERC20 refundToken, uint256 refundAmount) = getSellTokenAndSellAmount(proposal);
// Finally, transfer out the deposited funds.
require(
refundToken.transfer(proposal.exchanger, refundAmount),
"Transfer out of refund token failed"
);
emit ExchangeProposalCancelled(proposalId);
}
/**
* @notice Executes an exchange proposal that's been approved and not vetoed.
* @dev Callable by anyone. Reverts if the proposal is not in the Approved state
* or proposal.vetoPeriodSeconds has not elapsed since approval.
* @param proposalId The identifier of the proposal to execute.
*/
function executeExchangeProposal(uint256 proposalId) external nonReentrant {
ExchangeProposal storage proposal = exchangeProposals[proposalId];
// Require that the proposal is in the Approved state.
require(proposal.state == ExchangeProposalState.Approved, "Proposal must be in Approved state");
// Require that the veto period has elapsed since the approval time.
require(
proposal.approvalTimestamp.add(proposal.vetoPeriodSeconds) <= block.timestamp,
"Veto period not elapsed"
);
// Mark the proposal as executed. Do so prior to exchanging as a measure against reentrancy.
proposal.state = ExchangeProposalState.Executed;
// Perform the exchange.
(IERC20 sellToken, uint256 sellAmount) = getSellTokenAndSellAmount(proposal);
// If the exchange sells CELO, the CELO is sent to the Reserve from this contract
// and stable token is minted to the exchanger.
if (proposal.sellCelo) {
// Send the CELO from this contract to the reserve.
require(
sellToken.transfer(address(getReserve()), sellAmount),
"Transfer out of CELO to Reserve failed"
);
// Mint stable token to the exchanger.
require(
IStableToken(proposal.stableToken).mint(proposal.exchanger, proposal.buyAmount),
"Stable token mint failed"
);
} else {
// If the exchange is selling stable token, the stable token is burned from
// this contract and CELO is transferred from the Reserve to the exchanger.
// Burn the stable token from this contract.
require(IStableToken(proposal.stableToken).burn(sellAmount), "Stable token burn failed");
// Transfer the CELO from the Reserve to the exchanger.
require(
getReserve().transferExchangeGold(proposal.exchanger, proposal.buyAmount),
"Transfer out of CELO from Reserve failed"
);
}
emit ExchangeProposalExecuted(proposalId);
}
/**
* @notice Gets the sell token and the sell amount for a proposal.
* @dev For stable token sell amounts that are stored as units, the value
* is returned. Ensures sell amount is not greater than this contract's balance.
* @param proposal The proposal to get the sell token and sell amount for.
* @return (the IERC20 sell token, the value sell amount).
*/
function getSellTokenAndSellAmount(ExchangeProposal memory proposal)
private
view
returns (IERC20, uint256)
{
IERC20 sellToken;
uint256 sellAmount;
if (proposal.sellCelo) {
sellToken = getGoldToken();
sellAmount = proposal.sellAmount;
} else {
address stableToken = proposal.stableToken;
sellToken = IERC20(stableToken);
// When selling stableToken, the sell amount is stored in units.
// Units must be converted to value when refunding.
sellAmount = IStableToken(stableToken).unitsToValue(proposal.sellAmount);
}
// In the event a precision issue from the unit <-> value calculations results
// in sellAmount being greater than this contract's balance, set the sellAmount
// to the entire balance.
// This check should not be necessary for CELO, but is done so regardless
// for extra certainty that cancelling an exchange proposal can never fail
// if for some reason the CELO balance of this contract is less than the
// recorded sell amount.
uint256 totalBalance = sellToken.balanceOf(address(this));
if (totalBalance < sellAmount) {
sellAmount = totalBalance;
}
return (sellToken, sellAmount);
}
/**
* @notice Using the oracle price, charges the spread and calculates the amount of
* the asset being bought.
* @dev Stable token value amounts are used for the sellAmount, not unit amounts.
* Assumes both CELO and the stable token have 18 decimals.
* @param celoStableTokenExchangeRate The unwrapped fraction exchange rate of CELO
* quoted in the stable token.
* @param sellAmount The amount of the sell token being sold.
* @param sellCelo Whether CELO is being sold.
* @return The amount of the asset being bought.
*/
function getBuyAmount(uint256 celoStableTokenExchangeRate, uint256 sellAmount, bool sellCelo)
public
view
returns (uint256)
{
FixidityLib.Fraction memory exchangeRate = FixidityLib.wrap(celoStableTokenExchangeRate);
// If stableToken is being sold, instead use the price of stableToken
// quoted in CELO.
if (!sellCelo) {
exchangeRate = exchangeRate.reciprocal();
}
// The sell amount taking the spread into account, ie:
// (1 - spread) * sellAmount
FixidityLib.Fraction memory adjustedSellAmount = FixidityLib.fixed1().subtract(spread).multiply(
FixidityLib.newFixed(sellAmount)
);
// Calculate the buy amount:
// exchangeRate * adjustedSellAmount
return exchangeRate.multiply(adjustedSellAmount).fromFixed();
}
/**
* @notice Removes the proposal ID found at the provided index of activeProposalIdsSuperset
* if the exchange proposal is not active.
* @dev Anyone can call. Reverts if the exchange proposal is active.
* @param index The index of the proposal ID to remove from activeProposalIdsSuperset.
*/
function removeFromActiveProposalIdsSuperset(uint256 index) external {
require(index < activeProposalIdsSuperset.length, "Index out of bounds");
uint256 proposalId = activeProposalIdsSuperset[index];
// Require the exchange proposal to be inactive.
require(
exchangeProposals[proposalId].state != ExchangeProposalState.Proposed &&
exchangeProposals[proposalId].state != ExchangeProposalState.Approved,
"Exchange proposal not inactive"
);
// If not removing the last element, overwrite the index with the value of
// the last element.
uint256 lastIndex = activeProposalIdsSuperset.length.sub(1);
if (index < lastIndex) {
activeProposalIdsSuperset[index] = activeProposalIdsSuperset[lastIndex];
}
// Delete the last element.
activeProposalIdsSuperset.length--;
}
/**
* @notice Gets the proposal identifiers of exchange proposals in the
* Proposed or Approved state. Returns a version of activeProposalIdsSuperset
* with inactive proposal IDs set as 0.
* @dev Elements with a proposal ID of 0 should be filtered out by the consumer.
* @return An array of active exchange proposals IDs.
*/
function getActiveProposalIds() external view returns (uint256[] memory) {
// Solidity doesn't play well with dynamically sized memory arrays.
// Instead, this array is created with the same length as activeProposalIdsSuperset,
// and will replace elements that are inactive proposal IDs with the value 0.
uint256[] memory activeProposalIds = new uint256[](activeProposalIdsSuperset.length);
for (uint256 i = 0; i < activeProposalIdsSuperset.length; i = i.add(1)) {
uint256 proposalId = activeProposalIdsSuperset[i];
if (
exchangeProposals[proposalId].state == ExchangeProposalState.Proposed ||
exchangeProposals[proposalId].state == ExchangeProposalState.Approved
) {
activeProposalIds[i] = proposalId;
}
}
return activeProposalIds;
}
/**
* @notice Gets the oracle CELO price quoted in the stable token.
* @dev Reverts if there is not a rate for the provided stable token.
* @param stableToken The stable token to get the oracle price for.
* @return The oracle CELO price quoted in the stable token.
*/
function getOracleExchangeRate(address stableToken)
private
view
returns (FixidityLib.Fraction memory)
{
uint256 rateNumerator;
uint256 rateDenominator;
(rateNumerator, rateDenominator) = getSortedOracles().medianRate(stableToken);
// When rateDenominator is 0, it means there are no rates known to SortedOracles.
require(rateDenominator > 0, "No oracle rates present for token");
return FixidityLib.wrap(rateNumerator).divide(FixidityLib.wrap(rateDenominator));
}
/**
* @notice Gets the minimum and maximum amount of a stable token that can be
* involved in a single exchange.
* @dev Reverts if there is no explicit exchange limit for the stable token.
* @param stableTokenRegistryId The string registry ID for the stable token.
* @return (minimum exchange amount, maximum exchange amount).
*/
function getStableTokenExchangeLimits(string memory stableTokenRegistryId)
public
view
returns (uint256, uint256)
{
ExchangeLimits memory exchangeLimits = stableTokenExchangeLimits[stableTokenRegistryId];
// Require the configurable stableToken max exchange amount to be > 0.
// This covers the case where a stableToken has never been explicitly permitted.
require(
exchangeLimits.maxExchangeAmount > 0,
"Max stable token exchange amount must be defined"
);
return (exchangeLimits.minExchangeAmount, exchangeLimits.maxExchangeAmount);
}
/**
* @notice Sets the approver.
* @dev Sender must be owner. New approver is allowed to be address(0).
* @param newApprover The new value for the approver.
*/
function setApprover(address newApprover) public onlyOwner {
approver = newApprover;
emit ApproverSet(newApprover);
}
/**
* @notice Sets the maximum allowed change in the CELO/stable token price when
* an exchange proposal is being approved relative to the price when the proposal
* was created.
* @dev Sender must be owner.
* @param newMaxApprovalExchangeRateChange The new value for maxApprovalExchangeRateChange
* to be wrapped.
*/
function setMaxApprovalExchangeRateChange(uint256 newMaxApprovalExchangeRateChange)
public
onlyOwner
{
maxApprovalExchangeRateChange = FixidityLib.wrap(newMaxApprovalExchangeRateChange);
emit MaxApprovalExchangeRateChangeSet(newMaxApprovalExchangeRateChange);
}
/**
* @notice Sets the spread.
* @dev Sender must be owner.
* @param newSpread The new value for the spread to be wrapped. Must be <= fixed 1.
*/
function setSpread(uint256 newSpread) public onlyOwner {
require(newSpread <= FixidityLib.fixed1().unwrap(), "Spread must be smaller than 1");
spread = FixidityLib.wrap(newSpread);
emit SpreadSet(newSpread);
}
/**
* @notice Sets the minimum and maximum amount of the stable token an exchange can involve.
* @dev Sender must be owner. Setting the maxExchangeAmount to 0 effectively disables new
* exchange proposals for the token.
* @param stableTokenRegistryId The registry ID string for the stable token to set limits for.
* @param minExchangeAmount The new minimum exchange amount for the stable token.
* @param maxExchangeAmount The new maximum exchange amount for the stable token.
*/
function setStableTokenExchangeLimits(
string calldata stableTokenRegistryId,
uint256 minExchangeAmount,
uint256 maxExchangeAmount
) external onlyOwner {
require(
minExchangeAmount <= maxExchangeAmount,
"Min exchange amount must not be greater than max"
);
stableTokenExchangeLimits[stableTokenRegistryId] = ExchangeLimits({
minExchangeAmount: minExchangeAmount,
maxExchangeAmount: maxExchangeAmount
});
emit StableTokenExchangeLimitsSet(stableTokenRegistryId, minExchangeAmount, maxExchangeAmount);
}
/**
* @notice Sets the veto period in seconds.
* @dev Sender must be owner.
* @param newVetoPeriodSeconds The new value for the veto period in seconds.
*/
function setVetoPeriodSeconds(uint256 newVetoPeriodSeconds) public onlyOwner {
// Hardcode a max of 4 weeks.
// A minimum is not enforced for flexibility. A case of interest is if
// Governance were to be set as the `approver`, it would be desirable to
// set the veto period to 0 seconds.
require(newVetoPeriodSeconds <= 4 weeks, "Veto period cannot exceed 4 weeks");
vetoPeriodSeconds = newVetoPeriodSeconds;
emit VetoPeriodSecondsSet(newVetoPeriodSeconds);
}
}

IERC20.sol

pragma solidity ^0.5.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see {ERC20Detailed}.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}

IAccounts.sol

pragma solidity ^0.5.13;
interface IAccounts {
function isAccount(address) external view returns (bool);
function voteSignerToAccount(address) external view returns (address);
function validatorSignerToAccount(address) external view returns (address);
function attestationSignerToAccount(address) external view returns (address);
function signerToAccount(address) external view returns (address);
function getAttestationSigner(address) external view returns (address);
function getValidatorSigner(address) external view returns (address);
function getVoteSigner(address) external view returns (address);
function hasAuthorizedVoteSigner(address) external view returns (bool);
function hasAuthorizedValidatorSigner(address) external view returns (bool);
function hasAuthorizedAttestationSigner(address) external view returns (bool);
function setAccountDataEncryptionKey(bytes calldata) external;
function setMetadataURL(string calldata) external;
function setName(string calldata) external;
function setWalletAddress(address, uint8, bytes32, bytes32) external;
function setAccount(string calldata, bytes calldata, address, uint8, bytes32, bytes32) external;
function getDataEncryptionKey(address) external view returns (bytes memory);
function getWalletAddress(address) external view returns (address);
function getMetadataURL(address) external view returns (string memory);
function batchGetMetadataURL(address[] calldata)
external
view
returns (uint256[] memory, bytes memory);
function getName(address) external view returns (string memory);
function authorizeVoteSigner(address, uint8, bytes32, bytes32) external;
function authorizeValidatorSigner(address, uint8, bytes32, bytes32) external;
function authorizeValidatorSignerWithPublicKey(address, uint8, bytes32, bytes32, bytes calldata)
external;
function authorizeValidatorSignerWithKeys(
address,
uint8,
bytes32,
bytes32,
bytes calldata,
bytes calldata,
bytes calldata
) external;
function authorizeAttestationSigner(address, uint8, bytes32, bytes32) external;
function createAccount() external returns (bool);
}

Ownable.sol

pragma solidity ^0.5.0;
import "../GSN/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(isOwner(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Returns true if the caller is the current owner.
*/
function isOwner() public view returns (bool) {
return _msgSender() == _owner;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public onlyOwner {
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
*/
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}

SafeMath.sol

pragma solidity ^0.5.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*
* _Available since v2.4.0._
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}

Context.sol

pragma solidity ^0.5.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
contract Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}

IStableToken.sol

pragma solidity ^0.5.13;
/**
* @title This interface describes the functions specific to Celo Stable Tokens, and in the
* absence of interface inheritance is intended as a companion to IERC20.sol and ICeloToken.sol.
*/
interface IStableToken {
function mint(address, uint256) external returns (bool);
function burn(uint256) external returns (bool);
function setInflationParameters(uint256, uint256) external;
function valueToUnits(uint256) external view returns (uint256);
function unitsToValue(uint256) external view returns (uint256);
function getInflationParameters() external view returns (uint256, uint256, uint256, uint256);
// NOTE: duplicated with IERC20.sol, remove once interface inheritance is supported.
function balanceOf(address) external view returns (uint256);
}

ISortedOracles.sol

pragma solidity ^0.5.13;
interface ISortedOracles {
function addOracle(address, address) external;
function removeOracle(address, address, uint256) external;
function report(address, uint256, address, address) external;
function removeExpiredReports(address, uint256) external;
function isOldestReportExpired(address token) external view returns (bool, address);
function numRates(address) external view returns (uint256);
function medianRate(address) external view returns (uint256, uint256);
function numTimestamps(address) external view returns (uint256);
function medianTimestamp(address) external view returns (uint256);
}

IReserve.sol

pragma solidity ^0.5.13;
interface IReserve {
function setTobinTaxStalenessThreshold(uint256) external;
function addToken(address) external returns (bool);
function removeToken(address, uint256) external returns (bool);
function transferGold(address payable, uint256) external returns (bool);
function transferExchangeGold(address payable, uint256) external returns (bool);
function getReserveGoldBalance() external view returns (uint256);
function getUnfrozenReserveGoldBalance() external view returns (uint256);
function getOrComputeTobinTax() external returns (uint256, uint256);
function getTokens() external view returns (address[] memory);
function getReserveRatio() external view returns (uint256);
function addExchangeSpender(address) external;
function removeExchangeSpender(address, uint256) external;
function addSpender(address) external;
function removeSpender(address) external;
}

IExchange.sol

pragma solidity ^0.5.13;
interface IExchange {
function buy(uint256, uint256, bool) external returns (uint256);
function sell(uint256, uint256, bool) external returns (uint256);
function exchange(uint256, uint256, bool) external returns (uint256);
function setUpdateFrequency(uint256) external;
function getBuyTokenAmount(uint256, bool) external view returns (uint256);
function getSellTokenAmount(uint256, bool) external view returns (uint256);
function getBuyAndSellBuckets(bool) external view returns (uint256, uint256);
}

IRandom.sol

pragma solidity ^0.5.13;
interface IRandom {
function revealAndCommit(bytes32, bytes32, address) external;
function randomnessBlockRetentionWindow() external view returns (uint256);
function random() external view returns (bytes32);
function getBlockRandomness(uint256) external view returns (bytes32);
}

IAttestations.sol

pragma solidity ^0.5.13;
interface IAttestations {
function request(bytes32, uint256, address) external;
function selectIssuers(bytes32) external;
function complete(bytes32, uint8, bytes32, bytes32) external;
function revoke(bytes32, uint256) external;
function withdraw(address) external;
function approveTransfer(bytes32, uint256, address, address, bool) external;
// view functions
function getUnselectedRequest(bytes32, address) external view returns (uint32, uint32, address);
function getAttestationIssuers(bytes32, address) external view returns (address[] memory);
function getAttestationStats(bytes32, address) external view returns (uint32, uint32);
function batchGetAttestationStats(bytes32[] calldata)
external
view
returns (uint256[] memory, address[] memory, uint64[] memory, uint64[] memory);
function getAttestationState(bytes32, address, address)
external
view
returns (uint8, uint32, address);
function getCompletableAttestations(bytes32, address)
external
view
returns (uint32[] memory, address[] memory, uint256[] memory, bytes memory);
function getAttestationRequestFee(address) external view returns (uint256);
function getMaxAttestations() external view returns (uint256);
function validateAttestationCode(bytes32, address, uint8, bytes32, bytes32)
external
view
returns (address);
function lookupAccountsForIdentifier(bytes32) external view returns (address[] memory);
function requireNAttestationsRequested(bytes32, address, uint32) external view;
// only owner
function setAttestationRequestFee(address, uint256) external;
function setAttestationExpiryBlocks(uint256) external;
function setSelectIssuersWaitBlocks(uint256) external;
function setMaxAttestations(uint256) external;
}

IValidators.sol

pragma solidity ^0.5.13;
interface IValidators {
function registerValidator(bytes calldata, bytes calldata, bytes calldata)
external
returns (bool);
function deregisterValidator(uint256) external returns (bool);
function affiliate(address) external returns (bool);
function deaffiliate() external returns (bool);
function updateBlsPublicKey(bytes calldata, bytes calldata) external returns (bool);
function registerValidatorGroup(uint256) external returns (bool);
function deregisterValidatorGroup(uint256) external returns (bool);
function addMember(address) external returns (bool);
function addFirstMember(address, address, address) external returns (bool);
function removeMember(address) external returns (bool);
function reorderMember(address, address, address) external returns (bool);
function updateCommission() external;
function setNextCommissionUpdate(uint256) external;
function resetSlashingMultiplier() external;
// only owner
function setCommissionUpdateDelay(uint256) external;
function setMaxGroupSize(uint256) external returns (bool);
function setMembershipHistoryLength(uint256) external returns (bool);
function setValidatorScoreParameters(uint256, uint256) external returns (bool);
function setGroupLockedGoldRequirements(uint256, uint256) external returns (bool);
function setValidatorLockedGoldRequirements(uint256, uint256) external returns (bool);
function setSlashingMultiplierResetPeriod(uint256) external;
// view functions
function getMaxGroupSize() external view returns (uint256);
function getCommissionUpdateDelay() external view returns (uint256);
function getValidatorScoreParameters() external view returns (uint256, uint256);
function getMembershipHistory(address)
external
view
returns (uint256[] memory, address[] memory, uint256, uint256);
function calculateEpochScore(uint256) external view returns (uint256);
function calculateGroupEpochScore(uint256[] calldata) external view returns (uint256);
function getAccountLockedGoldRequirement(address) external view returns (uint256);
function meetsAccountLockedGoldRequirements(address) external view returns (bool);
function getValidatorBlsPublicKeyFromSigner(address) external view returns (bytes memory);
function getValidator(address account)
external
view
returns (bytes memory, bytes memory, address, uint256, address);
function getValidatorGroup(address)
external
view
returns (address[] memory, uint256, uint256, uint256, uint256[] memory, uint256, uint256);
function getGroupNumMembers(address) external view returns (uint256);
function getTopGroupValidators(address, uint256) external view returns (address[] memory);
function getGroupsNumMembers(address[] calldata accounts)
external
view
returns (uint256[] memory);
function getNumRegisteredValidators() external view returns (uint256);
function groupMembershipInEpoch(address, uint256, uint256) external view returns (address);
// only registered contract
function updateEcdsaPublicKey(address, address, bytes calldata) external returns (bool);
function updatePublicKeys(address, address, bytes calldata, bytes calldata, bytes calldata)
external
returns (bool);
function getValidatorLockedGoldRequirements() external view returns (uint256, uint256);
function getGroupLockedGoldRequirements() external view returns (uint256, uint256);
function getRegisteredValidators() external view returns (address[] memory);
function getRegisteredValidatorSigners() external view returns (address[] memory);
function getRegisteredValidatorGroups() external view returns (address[] memory);
function isValidatorGroup(address) external view returns (bool);
function isValidator(address) external view returns (bool);
function getValidatorGroupSlashingMultiplier(address) external view returns (uint256);
function getMembershipInLastEpoch(address) external view returns (address);
function getMembershipInLastEpochFromSigner(address) external view returns (address);
// only VM
function updateValidatorScoreFromSigner(address, uint256) external;
function distributeEpochPaymentsFromSigner(address, uint256) external returns (uint256);
// only slasher
function forceDeaffiliateIfValidator(address) external;
function halveSlashingMultiplier(address) external;
}

ILockedGold.sol

pragma solidity ^0.5.13;
interface ILockedGold {
function incrementNonvotingAccountBalance(address, uint256) external;
function decrementNonvotingAccountBalance(address, uint256) external;
function getAccountTotalLockedGold(address) external view returns (uint256);
function getTotalLockedGold() external view returns (uint256);
function getPendingWithdrawals(address)
external
view
returns (uint256[] memory, uint256[] memory);
function getTotalPendingWithdrawals(address) external view returns (uint256);
function lock() external payable;
function unlock(uint256) external;
function relock(uint256, uint256) external;
function withdraw(uint256) external;
function slash(
address account,
uint256 penalty,
address reporter,
uint256 reward,
address[] calldata lessers,
address[] calldata greaters,
uint256[] calldata indices
) external;
function isSlasher(address) external view returns (bool);
}

IGovernance.sol

pragma solidity ^0.5.13;
interface IGovernance {
function isVoting(address) external view returns (bool);
}

IElection.sol

pragma solidity ^0.5.13;
interface IElection {
function electValidatorSigners() external view returns (address[] memory);
function electNValidatorSigners(uint256, uint256) external view returns (address[] memory);
function vote(address, uint256, address, address) external returns (bool);
function activate(address) external returns (bool);
function revokeActive(address, uint256, address, address, uint256) external returns (bool);
function revokeAllActive(address, address, address, uint256) external returns (bool);
function revokePending(address, uint256, address, address, uint256) external returns (bool);
function markGroupIneligible(address) external;
function markGroupEligible(address, address, address) external;
function forceDecrementVotes(
address,
uint256,
address[] calldata,
address[] calldata,
uint256[] calldata
) external returns (uint256);
// view functions
function getElectableValidators() external view returns (uint256, uint256);
function getElectabilityThreshold() external view returns (uint256);
function getNumVotesReceivable(address) external view returns (uint256);
function getTotalVotes() external view returns (uint256);
function getActiveVotes() external view returns (uint256);
function getTotalVotesByAccount(address) external view returns (uint256);
function getPendingVotesForGroupByAccount(address, address) external view returns (uint256);
function getActiveVotesForGroupByAccount(address, address) external view returns (uint256);
function getTotalVotesForGroupByAccount(address, address) external view returns (uint256);
function getActiveVoteUnitsForGroupByAccount(address, address) external view returns (uint256);
function getTotalVotesForGroup(address) external view returns (uint256);
function getActiveVotesForGroup(address) external view returns (uint256);
function getPendingVotesForGroup(address) external view returns (uint256);
function getGroupEligibility(address) external view returns (bool);
function getGroupEpochRewards(address, uint256, uint256[] calldata)
external
view
returns (uint256);
function getGroupsVotedForByAccount(address) external view returns (address[] memory);
function getEligibleValidatorGroups() external view returns (address[] memory);
function getTotalVotesForEligibleValidatorGroups()
external
view
returns (address[] memory, uint256[] memory);
function getCurrentValidatorSigners() external view returns (address[] memory);
function canReceiveVotes(address, uint256) external view returns (bool);
function hasActivatablePendingVotes(address, address) external view returns (bool);
// only owner
function setElectableValidators(uint256, uint256) external returns (bool);
function setMaxNumGroupsVotedFor(uint256) external returns (bool);
function setElectabilityThreshold(uint256) external returns (bool);
// only VM
function distributeEpochRewards(address, uint256, address, address) external;
}

ReentrancyGuard.sol

pragma solidity ^0.5.13;
/**
* @title Helps contracts guard against reentrancy attacks.
* @author Remco Bloemen <[email protected]π.com>, Eenae <[email protected]>
* @dev If you mark a function `nonReentrant`, you should also
* mark it `external`.
*/
contract ReentrancyGuard {
/// @dev counter to allow mutex lock with only one SSTORE operation
uint256 private _guardCounter;
constructor() internal {
// The counter starts at one to prevent changing it from zero to a non-zero
// value, which is a more expensive operation.
_guardCounter = 1;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_guardCounter += 1;
uint256 localCounter = _guardCounter;
_;
require(localCounter == _guardCounter, "reentrant call");
}
}

IRegistry.sol

pragma solidity ^0.5.13;
interface IRegistry {
function setAddressFor(string calldata, address) external;
function getAddressForOrDie(bytes32) external view returns (address);
function getAddressFor(bytes32) external view returns (address);
function getAddressForStringOrDie(string calldata identifier) external view returns (address);
function getAddressForString(string calldata identifier) external view returns (address);
function isOneOf(bytes32[] calldata, address) external view returns (bool);
}

IFreezer.sol

pragma solidity ^0.5.13;
interface IFreezer {
function isFrozen(address) external view returns (bool);
}

IFeeCurrencyWhitelist.sol

pragma solidity ^0.5.13;
interface IFeeCurrencyWhitelist {
function addToken(address) external;
function getWhitelist() external view returns (address[] memory);
}

ICeloVersionedContract.sol

pragma solidity ^0.5.13;
interface ICeloVersionedContract {
/**
* @notice Returns the storage, major, minor, and patch version of the contract.
* @return The storage, major, minor, and patch version of the contract.
*/
function getVersionNumber() external pure returns (uint256, uint256, uint256, uint256);
}

UsingRegistry.sol

pragma solidity ^0.5.13;
import "openzeppelin-solidity/contracts/ownership/Ownable.sol";
import "openzeppelin-solidity/contracts/token/ERC20/IERC20.sol";
import "./interfaces/IAccounts.sol";
import "./interfaces/IFeeCurrencyWhitelist.sol";
import "./interfaces/IFreezer.sol";
import "./interfaces/IRegistry.sol";
import "../governance/interfaces/IElection.sol";
import "../governance/interfaces/IGovernance.sol";
import "../governance/interfaces/ILockedGold.sol";
import "../governance/interfaces/IValidators.sol";
import "../identity/interfaces/IRandom.sol";
import "../identity/interfaces/IAttestations.sol";
import "../stability/interfaces/IExchange.sol";
import "../stability/interfaces/IReserve.sol";
import "../stability/interfaces/ISortedOracles.sol";
import "../stability/interfaces/IStableToken.sol";
contract UsingRegistry is Ownable {
event RegistrySet(address indexed registryAddress);
// solhint-disable state-visibility
bytes32 constant ACCOUNTS_REGISTRY_ID = keccak256(abi.encodePacked("Accounts"));
bytes32 constant ATTESTATIONS_REGISTRY_ID = keccak256(abi.encodePacked("Attestations"));
bytes32 constant DOWNTIME_SLASHER_REGISTRY_ID = keccak256(abi.encodePacked("DowntimeSlasher"));
bytes32 constant DOUBLE_SIGNING_SLASHER_REGISTRY_ID = keccak256(
abi.encodePacked("DoubleSigningSlasher")
);
bytes32 constant ELECTION_REGISTRY_ID = keccak256(abi.encodePacked("Election"));
bytes32 constant EXCHANGE_REGISTRY_ID = keccak256(abi.encodePacked("Exchange"));
bytes32 constant FEE_CURRENCY_WHITELIST_REGISTRY_ID = keccak256(
abi.encodePacked("FeeCurrencyWhitelist")
);
bytes32 constant FREEZER_REGISTRY_ID = keccak256(abi.encodePacked("Freezer"));
bytes32 constant GOLD_TOKEN_REGISTRY_ID = keccak256(abi.encodePacked("GoldToken"));
bytes32 constant GOVERNANCE_REGISTRY_ID = keccak256(abi.encodePacked("Governance"));
bytes32 constant GOVERNANCE_SLASHER_REGISTRY_ID = keccak256(
abi.encodePacked("GovernanceSlasher")
);
bytes32 constant LOCKED_GOLD_REGISTRY_ID = keccak256(abi.encodePacked("LockedGold"));
bytes32 constant RESERVE_REGISTRY_ID = keccak256(abi.encodePacked("Reserve"));
bytes32 constant RANDOM_REGISTRY_ID = keccak256(abi.encodePacked("Random"));
bytes32 constant SORTED_ORACLES_REGISTRY_ID = keccak256(abi.encodePacked("SortedOracles"));
bytes32 constant STABLE_TOKEN_REGISTRY_ID = keccak256(abi.encodePacked("StableToken"));
bytes32 constant VALIDATORS_REGISTRY_ID = keccak256(abi.encodePacked("Validators"));
// solhint-enable state-visibility
IRegistry public registry;
modifier onlyRegisteredContract(bytes32 identifierHash) {
require(registry.getAddressForOrDie(identifierHash) == msg.sender, "only registered contract");
_;
}
modifier onlyRegisteredContracts(bytes32[] memory identifierHashes) {
require(registry.isOneOf(identifierHashes, msg.sender), "only registered contracts");
_;
}
/**
* @notice Updates the address pointing to a Registry contract.
* @param registryAddress The address of a registry contract for routing to other contracts.
*/
function setRegistry(address registryAddress) public onlyOwner {
require(registryAddress != address(0), "Cannot register the null address");
registry = IRegistry(registryAddress);
emit RegistrySet(registryAddress);
}
function getAccounts() internal view returns (IAccounts) {
return IAccounts(registry.getAddressForOrDie(ACCOUNTS_REGISTRY_ID));
}
function getAttestations() internal view returns (IAttestations) {
return IAttestations(registry.getAddressForOrDie(ATTESTATIONS_REGISTRY_ID));
}
function getElection() internal view returns (IElection) {
return IElection(registry.getAddressForOrDie(ELECTION_REGISTRY_ID));
}
function getExchange() internal view returns (IExchange) {
return IExchange(registry.getAddressForOrDie(EXCHANGE_REGISTRY_ID));
}
function getFeeCurrencyWhitelistRegistry() internal view returns (IFeeCurrencyWhitelist) {
return IFeeCurrencyWhitelist(registry.getAddressForOrDie(FEE_CURRENCY_WHITELIST_REGISTRY_ID));
}
function getFreezer() internal view returns (IFreezer) {
return IFreezer(registry.getAddressForOrDie(FREEZER_REGISTRY_ID));
}
function getGoldToken() internal view returns (IERC20) {
return IERC20(registry.getAddressForOrDie(GOLD_TOKEN_REGISTRY_ID));
}
function getGovernance() internal view returns (IGovernance) {
return IGovernance(registry.getAddressForOrDie(GOVERNANCE_REGISTRY_ID));
}
function getLockedGold() internal view returns (ILockedGold) {
return ILockedGold(registry.getAddressForOrDie(LOCKED_GOLD_REGISTRY_ID));
}
function getRandom() internal view returns (IRandom) {
return IRandom(registry.getAddressForOrDie(RANDOM_REGISTRY_ID));
}
function getReserve() internal view returns (IReserve) {
return IReserve(registry.getAddressForOrDie(RESERVE_REGISTRY_ID));
}
function getSortedOracles() internal view returns (ISortedOracles) {
return ISortedOracles(registry.getAddressForOrDie(SORTED_ORACLES_REGISTRY_ID));
}
function getStableToken() internal view returns (IStableToken) {
return IStableToken(registry.getAddressForOrDie(STABLE_TOKEN_REGISTRY_ID));
}
function getValidators() internal view returns (IValidators) {
return IValidators(registry.getAddressForOrDie(VALIDATORS_REGISTRY_ID));
}
}

Initializable.sol

pragma solidity ^0.5.13;
contract Initializable {
bool public initialized;
constructor(bool testingDeployment) public {
if (!testingDeployment) {
initialized = true;
}
}
modifier initializer() {
require(!initialized, "contract already initialized");
initialized = true;
_;
}
}

FixidityLib.sol

pragma solidity ^0.5.13;
/**
* @title FixidityLib
* @author Gadi Guy, Alberto Cuesta Canada
* @notice This library provides fixed point arithmetic with protection against
* overflow.
* All operations are done with uint256 and the operands must have been created
* with any of the newFrom* functions, which shift the comma digits() to the
* right and check for limits, or with wrap() which expects a number already
* in the internal representation of a fraction.
* When using this library be sure to use maxNewFixed() as the upper limit for
* creation of fixed point numbers.
* @dev All contained functions are pure and thus marked internal to be inlined
* on consuming contracts at compile time for gas efficiency.
*/
library FixidityLib {
struct Fraction {
uint256 value;
}
/**
* @notice Number of positions that the comma is shifted to the right.
*/
function digits() internal pure returns (uint8) {
return 24;
}
uint256 private constant FIXED1_UINT = 1000000000000000000000000;
/**
* @notice This is 1 in the fixed point units used in this library.
* @dev Test fixed1() equals 10^digits()
* Hardcoded to 24 digits.
*/
function fixed1() internal pure returns (Fraction memory) {
return Fraction(FIXED1_UINT);
}
/**
* @notice Wrap a uint256 that represents a 24-decimal fraction in a Fraction
* struct.
* @param x Number that already represents a 24-decimal fraction.
* @return A Fraction struct with contents x.
*/
function wrap(uint256 x) internal pure returns (Fraction memory) {
return Fraction(x);
}
/**
* @notice Unwraps the uint256 inside of a Fraction struct.
*/
function unwrap(Fraction memory x) internal pure returns (uint256) {
return x.value;
}
/**
* @notice The amount of decimals lost on each multiplication operand.
* @dev Test mulPrecision() equals sqrt(fixed1)
*/
function mulPrecision() internal pure returns (uint256) {
return 1000000000000;
}
/**
* @notice Maximum value that can be converted to fixed point. Optimize for deployment.
* @dev
* Test maxNewFixed() equals maxUint256() / fixed1()
*/
function maxNewFixed() internal pure returns (uint256) {
return 115792089237316195423570985008687907853269984665640564;
}
/**
* @notice Converts a uint256 to fixed point Fraction
* @dev Test newFixed(0) returns 0
* Test newFixed(1) returns fixed1()
* Test newFixed(maxNewFixed()) returns maxNewFixed() * fixed1()
* Test newFixed(maxNewFixed()+1) fails
*/
function newFixed(uint256 x) internal pure returns (Fraction memory) {
require(x <= maxNewFixed(), "can't create fixidity number larger than maxNewFixed()");
return Fraction(x * FIXED1_UINT);
}
/**
* @notice Converts a uint256 in the fixed point representation of this
* library to a non decimal. All decimal digits will be truncated.
*/
function fromFixed(Fraction memory x) internal pure returns (uint256) {
return x.value / FIXED1_UINT;
}
/**
* @notice Converts two uint256 representing a fraction to fixed point units,
* equivalent to multiplying dividend and divisor by 10^digits().
* @param numerator numerator must be <= maxNewFixed()
* @param denominator denominator must be <= maxNewFixed() and denominator can't be 0
* @dev
* Test newFixedFraction(1,0) fails
* Test newFixedFraction(0,1) returns 0
* Test newFixedFraction(1,1) returns fixed1()
* Test newFixedFraction(1,fixed1()) returns 1
*/
function newFixedFraction(uint256 numerator, uint256 denominator)
internal
pure
returns (Fraction memory)
{
Fraction memory convertedNumerator = newFixed(numerator);
Fraction memory convertedDenominator = newFixed(denominator);
return divide(convertedNumerator, convertedDenominator);
}
/**
* @notice Returns the integer part of a fixed point number.
* @dev
* Test integer(0) returns 0
* Test integer(fixed1()) returns fixed1()
* Test integer(newFixed(maxNewFixed())) returns maxNewFixed()*fixed1()
*/
function integer(Fraction memory x) internal pure returns (Fraction memory) {
return Fraction((x.value / FIXED1_UINT) * FIXED1_UINT); // Can't overflow
}
/**
* @notice Returns the fractional part of a fixed point number.
* In the case of a negative number the fractional is also negative.
* @dev
* Test fractional(0) returns 0
* Test fractional(fixed1()) returns 0
* Test fractional(fixed1()-1) returns 10^24-1
*/
function fractional(Fraction memory x) internal pure returns (Fraction memory) {
return Fraction(x.value - (x.value / FIXED1_UINT) * FIXED1_UINT); // Can't overflow
}
/**
* @notice x+y.
* @dev The maximum value that can be safely used as an addition operator is defined as
* maxFixedAdd = maxUint256()-1 / 2, or
* 57896044618658097711785492504343953926634992332820282019728792003956564819967.
* Test add(maxFixedAdd,maxFixedAdd) equals maxFixedAdd + maxFixedAdd
* Test add(maxFixedAdd+1,maxFixedAdd+1) throws
*/
function add(Fraction memory x, Fraction memory y) internal pure returns (Fraction memory) {
uint256 z = x.value + y.value;
require(z >= x.value, "add overflow detected");
return Fraction(z);
}
/**
* @notice x-y.
* @dev
* Test subtract(6, 10) fails
*/
function subtract(Fraction memory x, Fraction memory y) internal pure returns (Fraction memory) {
require(x.value >= y.value, "substraction underflow detected");
return Fraction(x.value - y.value);
}
/**
* @notice x*y. If any of the operators is higher than the max multiplier value it
* might overflow.
* @dev The maximum value that can be safely used as a multiplication operator
* (maxFixedMul) is calculated as sqrt(maxUint256()*fixed1()),
* or 340282366920938463463374607431768211455999999999999
* Test multiply(0,0) returns 0
* Test multiply(maxFixedMul,0) returns 0
* Test multiply(0,maxFixedMul) returns 0
* Test multiply(fixed1()/mulPrecision(),fixed1()*mulPrecision()) returns fixed1()
* Test multiply(maxFixedMul,maxFixedMul) is around maxUint256()
* Test multiply(maxFixedMul+1,maxFixedMul+1) fails
*/
function multiply(Fraction memory x, Fraction memory y) internal pure returns (Fraction memory) {
if (x.value == 0 || y.value == 0) return Fraction(0);
if (y.value == FIXED1_UINT) return x;
if (x.value == FIXED1_UINT) return y;
// Separate into integer and fractional parts
// x = x1 + x2, y = y1 + y2
uint256 x1 = integer(x).value / FIXED1_UINT;
uint256 x2 = fractional(x).value;
uint256 y1 = integer(y).value / FIXED1_UINT;
uint256 y2 = fractional(y).value;
// (x1 + x2) * (y1 + y2) = (x1 * y1) + (x1 * y2) + (x2 * y1) + (x2 * y2)
uint256 x1y1 = x1 * y1;
if (x1 != 0) require(x1y1 / x1 == y1, "overflow x1y1 detected");
// x1y1 needs to be multiplied back by fixed1
// solium-disable-next-line mixedcase
uint256 fixed_x1y1 = x1y1 * FIXED1_UINT;
if (x1y1 != 0) require(fixed_x1y1 / x1y1 == FIXED1_UINT, "overflow x1y1 * fixed1 detected");
x1y1 = fixed_x1y1;
uint256 x2y1 = x2 * y1;
if (x2 != 0) require(x2y1 / x2 == y1, "overflow x2y1 detected");
uint256 x1y2 = x1 * y2;
if (x1 != 0) require(x1y2 / x1 == y2, "overflow x1y2 detected");
x2 = x2 / mulPrecision();
y2 = y2 / mulPrecision();
uint256 x2y2 = x2 * y2;
if (x2 != 0) require(x2y2 / x2 == y2, "overflow x2y2 detected");
// result = fixed1() * x1 * y1 + x1 * y2 + x2 * y1 + x2 * y2 / fixed1();
Fraction memory result = Fraction(x1y1);
result = add(result, Fraction(x2y1)); // Add checks for overflow
result = add(result, Fraction(x1y2)); // Add checks for overflow
result = add(result, Fraction(x2y2)); // Add checks for overflow
return result;
}
/**
* @notice 1/x
* @dev
* Test reciprocal(0) fails
* Test reciprocal(fixed1()) returns fixed1()
* Test reciprocal(fixed1()*fixed1()) returns 1 // Testing how the fractional is truncated
* Test reciprocal(1+fixed1()*fixed1()) returns 0 // Testing how the fractional is truncated
* Test reciprocal(newFixedFraction(1, 1e24)) returns newFixed(1e24)
*/
function reciprocal(Fraction memory x) internal pure returns (Fraction memory) {
require(x.value != 0, "can't call reciprocal(0)");
return Fraction((FIXED1_UINT * FIXED1_UINT) / x.value); // Can't overflow
}
/**
* @notice x/y. If the dividend is higher than the max dividend value, it
* might overflow. You can use multiply(x,reciprocal(y)) instead.
* @dev The maximum value that can be safely used as a dividend (maxNewFixed) is defined as
* divide(maxNewFixed,newFixedFraction(1,fixed1())) is around maxUint256().
* This yields the value 115792089237316195423570985008687907853269984665640564.
* Test maxNewFixed equals maxUint256()/fixed1()
* Test divide(maxNewFixed,1) equals maxNewFixed*(fixed1)
* Test divide(maxNewFixed+1,multiply(mulPrecision(),mulPrecision())) throws
* Test divide(fixed1(),0) fails
* Test divide(maxNewFixed,1) = maxNewFixed*(10^digits())
* Test divide(maxNewFixed+1,1) throws
*/
function divide(Fraction memory x, Fraction memory y) internal pure returns (Fraction memory) {
require(y.value != 0, "can't divide by 0");
uint256 X = x.value * FIXED1_UINT;
require(X / FIXED1_UINT == x.value, "overflow at divide");
return Fraction(X / y.value);
}
/**
* @notice x > y
*/
function gt(Fraction memory x, Fraction memory y) internal pure returns (bool) {
return x.value > y.value;
}
/**
* @notice x >= y
*/
function gte(Fraction memory x, Fraction memory y) internal pure returns (bool) {
return x.value >= y.value;
}
/**
* @notice x < y
*/
function lt(Fraction memory x, Fraction memory y) internal pure returns (bool) {
return x.value < y.value;
}
/**
* @notice x <= y
*/
function lte(Fraction memory x, Fraction memory y) internal pure returns (bool) {
return x.value <= y.value;
}
/**
* @notice x == y
*/
function equals(Fraction memory x, Fraction memory y) internal pure returns (bool) {
return x.value == y.value;
}
/**
* @notice x <= 1
*/
function isProperFraction(Fraction memory x) internal pure returns (bool) {
return lte(x, fixed1());
}
}

Contract ABI

[{"type":"constructor","stateMutability":"nonpayable","payable":false,"inputs":[{"type":"bool","name":"test","internalType":"bool"}]},{"type":"event","name":"ApproverSet","inputs":[{"type":"address","name":"approver","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"ExchangeProposalApproved","inputs":[{"type":"uint256","name":"proposalId","internalType":"uint256","indexed":true}],"anonymous":false},{"type":"event","name":"ExchangeProposalCancelled","inputs":[{"type":"uint256","name":"proposalId","internalType":"uint256","indexed":true}],"anonymous":false},{"type":"event","name":"ExchangeProposalCreated","inputs":[{"type":"uint256","name":"proposalId","internalType":"uint256","indexed":true},{"type":"address","name":"exchanger","internalType":"address","indexed":true},{"type":"string","name":"stableTokenRegistryId","internalType":"string","indexed":false},{"type":"uint256","name":"sellAmount","internalType":"uint256","indexed":false},{"type":"uint256","name":"buyAmount","internalType":"uint256","indexed":false},{"type":"bool","name":"sellCelo","internalType":"bool","indexed":false}],"anonymous":false},{"type":"event","name":"ExchangeProposalExecuted","inputs":[{"type":"uint256","name":"proposalId","internalType":"uint256","indexed":true}],"anonymous":false},{"type":"event","name":"MaxApprovalExchangeRateChangeSet","inputs":[{"type":"uint256","name":"maxApprovalExchangeRateChange","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"OwnershipTransferred","inputs":[{"type":"address","name":"previousOwner","internalType":"address","indexed":true},{"type":"address","name":"newOwner","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"RegistrySet","inputs":[{"type":"address","name":"registryAddress","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"SpreadSet","inputs":[{"type":"uint256","name":"spread","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"StableTokenExchangeLimitsSet","inputs":[{"type":"string","name":"stableTokenRegistryId","internalType":"string","indexed":false},{"type":"uint256","name":"minExchangeAmount","internalType":"uint256","indexed":false},{"type":"uint256","name":"maxExchangeAmount","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"VetoPeriodSecondsSet","inputs":[{"type":"uint256","name":"vetoPeriodSeconds","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"activeProposalIdsSuperset","inputs":[{"type":"uint256","name":"","internalType":"uint256"}],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"approveExchangeProposal","inputs":[{"type":"uint256","name":"proposalId","internalType":"uint256"}],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"address","name":"","internalType":"address"}],"name":"approver","inputs":[],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"cancelExchangeProposal","inputs":[{"type":"uint256","name":"proposalId","internalType":"uint256"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"createExchangeProposal","inputs":[{"type":"string","name":"stableTokenRegistryId","internalType":"string"},{"type":"uint256","name":"sellAmount","internalType":"uint256"},{"type":"bool","name":"sellCelo","internalType":"bool"}],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"exchangeProposalCount","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"address","name":"exchanger","internalType":"address payable"},{"type":"address","name":"stableToken","internalType":"address"},{"type":"uint8","name":"state","internalType":"enum GrandaMento.ExchangeProposalState"},{"type":"bool","name":"sellCelo","internalType":"bool"},{"type":"uint256","name":"sellAmount","internalType":"uint256"},{"type":"uint256","name":"buyAmount","internalType":"uint256"},{"type":"uint256","name":"celoStableTokenExchangeRate","internalType":"uint256"},{"type":"uint256","name":"vetoPeriodSeconds","internalType":"uint256"},{"type":"uint256","name":"approvalTimestamp","internalType":"uint256"}],"name":"exchangeProposals","inputs":[{"type":"uint256","name":"","internalType":"uint256"}],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"executeExchangeProposal","inputs":[{"type":"uint256","name":"proposalId","internalType":"uint256"}],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256[]","name":"","internalType":"uint256[]"}],"name":"getActiveProposalIds","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"getBuyAmount","inputs":[{"type":"uint256","name":"celoStableTokenExchangeRate","internalType":"uint256"},{"type":"uint256","name":"sellAmount","internalType":"uint256"},{"type":"bool","name":"sellCelo","internalType":"bool"}],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"","internalType":"uint256"},{"type":"uint256","name":"","internalType":"uint256"}],"name":"getStableTokenExchangeLimits","inputs":[{"type":"string","name":"stableTokenRegistryId","internalType":"string"}],"constant":true},{"type":"function","stateMutability":"pure","payable":false,"outputs":[{"type":"uint256","name":"","internalType":"uint256"},{"type":"uint256","name":"","internalType":"uint256"},{"type":"uint256","name":"","internalType":"uint256"},{"type":"uint256","name":"","internalType":"uint256"}],"name":"getVersionNumber","inputs":[],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"initialize","inputs":[{"type":"address","name":"_registry","internalType":"address"},{"type":"address","name":"_approver","internalType":"address"},{"type":"uint256","name":"_maxApprovalExchangeRateChange","internalType":"uint256"},{"type":"uint256","name":"_spread","internalType":"uint256"},{"type":"uint256","name":"_vetoPeriodSeconds","internalType":"uint256"}],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"initialized","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"isOwner","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"value","internalType":"uint256"}],"name":"maxApprovalExchangeRateChange","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"address","name":"","internalType":"contract IRegistry"}],"name":"registry","inputs":[],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"removeFromActiveProposalIdsSuperset","inputs":[{"type":"uint256","name":"index","internalType":"uint256"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"renounceOwnership","inputs":[],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"setApprover","inputs":[{"type":"address","name":"newApprover","internalType":"address"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"setMaxApprovalExchangeRateChange","inputs":[{"type":"uint256","name":"newMaxApprovalExchangeRateChange","internalType":"uint256"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"setRegistry","inputs":[{"type":"address","name":"registryAddress","internalType":"address"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"setSpread","inputs":[{"type":"uint256","name":"newSpread","internalType":"uint256"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"setStableTokenExchangeLimits","inputs":[{"type":"string","name":"stableTokenRegistryId","internalType":"string"},{"type":"uint256","name":"minExchangeAmount","internalType":"uint256"},{"type":"uint256","name":"maxExchangeAmount","internalType":"uint256"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"setVetoPeriodSeconds","inputs":[{"type":"uint256","name":"newVetoPeriodSeconds","internalType":"uint256"}],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"value","internalType":"uint256"}],"name":"spread","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"minExchangeAmount","internalType":"uint256"},{"type":"uint256","name":"maxExchangeAmount","internalType":"uint256"}],"name":"stableTokenExchangeLimits","inputs":[{"type":"string","name":"","internalType":"string"}],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"transferOwnership","inputs":[{"type":"address","name":"newOwner","internalType":"address"}],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"vetoPeriodSeconds","inputs":[],"constant":true}]
            

Deployed ByteCode

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