Contract Source Code:
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;
interface IOracle {
function requestRandomness(bytes32 userRandomNumber) external returns (uint64);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)
pragma solidity ^0.8.20;
import {Context} from "../utils/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.
*
* The initial owner is set to the address provided by the deployer. This can
* later be changed with {transferOwnership}.
*
* 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.
*/
abstract contract Ownable is Context {
address private _owner;
/**
* @dev The caller account is not authorized to perform an operation.
*/
error OwnableUnauthorizedAccount(address account);
/**
* @dev The owner is not a valid owner account. (eg. `address(0)`)
*/
error OwnableInvalidOwner(address owner);
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the address provided by the deployer as the initial owner.
*/
constructor(address initialOwner) {
if (initialOwner == address(0)) {
revert OwnableInvalidOwner(address(0));
}
_transferOwnership(initialOwner);
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
if (owner() != _msgSender()) {
revert OwnableUnauthorizedAccount(_msgSender());
}
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby disabling any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(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 virtual onlyOwner {
if (newOwner == address(0)) {
revert OwnableInvalidOwner(address(0));
}
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (interfaces/draft-IERC6093.sol)
pragma solidity ^0.8.20;
/**
* @dev Standard ERC-20 Errors
* Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-20 tokens.
*/
interface IERC20Errors {
/**
* @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
* @param sender Address whose tokens are being transferred.
* @param balance Current balance for the interacting account.
* @param needed Minimum amount required to perform a transfer.
*/
error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed);
/**
* @dev Indicates a failure with the token `sender`. Used in transfers.
* @param sender Address whose tokens are being transferred.
*/
error ERC20InvalidSender(address sender);
/**
* @dev Indicates a failure with the token `receiver`. Used in transfers.
* @param receiver Address to which tokens are being transferred.
*/
error ERC20InvalidReceiver(address receiver);
/**
* @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers.
* @param spender Address that may be allowed to operate on tokens without being their owner.
* @param allowance Amount of tokens a `spender` is allowed to operate with.
* @param needed Minimum amount required to perform a transfer.
*/
error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed);
/**
* @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
* @param approver Address initiating an approval operation.
*/
error ERC20InvalidApprover(address approver);
/**
* @dev Indicates a failure with the `spender` to be approved. Used in approvals.
* @param spender Address that may be allowed to operate on tokens without being their owner.
*/
error ERC20InvalidSpender(address spender);
}
/**
* @dev Standard ERC-721 Errors
* Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-721 tokens.
*/
interface IERC721Errors {
/**
* @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in ERC-20.
* Used in balance queries.
* @param owner Address of the current owner of a token.
*/
error ERC721InvalidOwner(address owner);
/**
* @dev Indicates a `tokenId` whose `owner` is the zero address.
* @param tokenId Identifier number of a token.
*/
error ERC721NonexistentToken(uint256 tokenId);
/**
* @dev Indicates an error related to the ownership over a particular token. Used in transfers.
* @param sender Address whose tokens are being transferred.
* @param tokenId Identifier number of a token.
* @param owner Address of the current owner of a token.
*/
error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner);
/**
* @dev Indicates a failure with the token `sender`. Used in transfers.
* @param sender Address whose tokens are being transferred.
*/
error ERC721InvalidSender(address sender);
/**
* @dev Indicates a failure with the token `receiver`. Used in transfers.
* @param receiver Address to which tokens are being transferred.
*/
error ERC721InvalidReceiver(address receiver);
/**
* @dev Indicates a failure with the `operator`’s approval. Used in transfers.
* @param operator Address that may be allowed to operate on tokens without being their owner.
* @param tokenId Identifier number of a token.
*/
error ERC721InsufficientApproval(address operator, uint256 tokenId);
/**
* @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
* @param approver Address initiating an approval operation.
*/
error ERC721InvalidApprover(address approver);
/**
* @dev Indicates a failure with the `operator` to be approved. Used in approvals.
* @param operator Address that may be allowed to operate on tokens without being their owner.
*/
error ERC721InvalidOperator(address operator);
}
/**
* @dev Standard ERC-1155 Errors
* Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-1155 tokens.
*/
interface IERC1155Errors {
/**
* @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
* @param sender Address whose tokens are being transferred.
* @param balance Current balance for the interacting account.
* @param needed Minimum amount required to perform a transfer.
* @param tokenId Identifier number of a token.
*/
error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId);
/**
* @dev Indicates a failure with the token `sender`. Used in transfers.
* @param sender Address whose tokens are being transferred.
*/
error ERC1155InvalidSender(address sender);
/**
* @dev Indicates a failure with the token `receiver`. Used in transfers.
* @param receiver Address to which tokens are being transferred.
*/
error ERC1155InvalidReceiver(address receiver);
/**
* @dev Indicates a failure with the `operator`’s approval. Used in transfers.
* @param operator Address that may be allowed to operate on tokens without being their owner.
* @param owner Address of the current owner of a token.
*/
error ERC1155MissingApprovalForAll(address operator, address owner);
/**
* @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
* @param approver Address initiating an approval operation.
*/
error ERC1155InvalidApprover(address approver);
/**
* @dev Indicates a failure with the `operator` to be approved. Used in approvals.
* @param operator Address that may be allowed to operate on tokens without being their owner.
*/
error ERC1155InvalidOperator(address operator);
/**
* @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation.
* Used in batch transfers.
* @param idsLength Length of the array of token identifiers
* @param valuesLength Length of the array of token amounts
*/
error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/ERC20.sol)
pragma solidity ^0.8.20;
import {IERC20} from "./IERC20.sol";
import {IERC20Metadata} from "./extensions/IERC20Metadata.sol";
import {Context} from "../../utils/Context.sol";
import {IERC20Errors} from "../../interfaces/draft-IERC6093.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
*
* TIP: For a detailed writeup see our guide
* https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* The default value of {decimals} is 18. To change this, you should override
* this function so it returns a different value.
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC-20
* applications.
*/
abstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors {
mapping(address account => uint256) private _balances;
mapping(address account => mapping(address spender => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the default value returned by this function, unless
* it's overridden.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - the caller must have a balance of at least `value`.
*/
function transfer(address to, uint256 value) public virtual returns (bool) {
address owner = _msgSender();
_transfer(owner, to, value);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* NOTE: If `value` is the maximum `uint256`, the allowance is not updated on
* `transferFrom`. This is semantically equivalent to an infinite approval.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 value) public virtual returns (bool) {
address owner = _msgSender();
_approve(owner, spender, value);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Skips emitting an {Approval} event indicating an allowance update. This is not
* required by the ERC. See {xref-ERC20-_approve-address-address-uint256-bool-}[_approve].
*
* NOTE: Does not update the allowance if the current allowance
* is the maximum `uint256`.
*
* Requirements:
*
* - `from` and `to` cannot be the zero address.
* - `from` must have a balance of at least `value`.
* - the caller must have allowance for ``from``'s tokens of at least
* `value`.
*/
function transferFrom(address from, address to, uint256 value) public virtual returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, value);
_transfer(from, to, value);
return true;
}
/**
* @dev Moves a `value` amount of tokens from `from` to `to`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* NOTE: This function is not virtual, {_update} should be overridden instead.
*/
function _transfer(address from, address to, uint256 value) internal {
if (from == address(0)) {
revert ERC20InvalidSender(address(0));
}
if (to == address(0)) {
revert ERC20InvalidReceiver(address(0));
}
_update(from, to, value);
}
/**
* @dev Transfers a `value` amount of tokens from `from` to `to`, or alternatively mints (or burns) if `from`
* (or `to`) is the zero address. All customizations to transfers, mints, and burns should be done by overriding
* this function.
*
* Emits a {Transfer} event.
*/
function _update(address from, address to, uint256 value) internal virtual {
if (from == address(0)) {
// Overflow check required: The rest of the code assumes that totalSupply never overflows
_totalSupply += value;
} else {
uint256 fromBalance = _balances[from];
if (fromBalance < value) {
revert ERC20InsufficientBalance(from, fromBalance, value);
}
unchecked {
// Overflow not possible: value <= fromBalance <= totalSupply.
_balances[from] = fromBalance - value;
}
}
if (to == address(0)) {
unchecked {
// Overflow not possible: value <= totalSupply or value <= fromBalance <= totalSupply.
_totalSupply -= value;
}
} else {
unchecked {
// Overflow not possible: balance + value is at most totalSupply, which we know fits into a uint256.
_balances[to] += value;
}
}
emit Transfer(from, to, value);
}
/**
* @dev Creates a `value` amount of tokens and assigns them to `account`, by transferring it from address(0).
* Relies on the `_update` mechanism
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* NOTE: This function is not virtual, {_update} should be overridden instead.
*/
function _mint(address account, uint256 value) internal {
if (account == address(0)) {
revert ERC20InvalidReceiver(address(0));
}
_update(address(0), account, value);
}
/**
* @dev Destroys a `value` amount of tokens from `account`, lowering the total supply.
* Relies on the `_update` mechanism.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* NOTE: This function is not virtual, {_update} should be overridden instead
*/
function _burn(address account, uint256 value) internal {
if (account == address(0)) {
revert ERC20InvalidSender(address(0));
}
_update(account, address(0), value);
}
/**
* @dev Sets `value` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*
* Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument.
*/
function _approve(address owner, address spender, uint256 value) internal {
_approve(owner, spender, value, true);
}
/**
* @dev Variant of {_approve} with an optional flag to enable or disable the {Approval} event.
*
* By default (when calling {_approve}) the flag is set to true. On the other hand, approval changes made by
* `_spendAllowance` during the `transferFrom` operation set the flag to false. This saves gas by not emitting any
* `Approval` event during `transferFrom` operations.
*
* Anyone who wishes to continue emitting `Approval` events on the`transferFrom` operation can force the flag to
* true using the following override:
*
* ```solidity
* function _approve(address owner, address spender, uint256 value, bool) internal virtual override {
* super._approve(owner, spender, value, true);
* }
* ```
*
* Requirements are the same as {_approve}.
*/
function _approve(address owner, address spender, uint256 value, bool emitEvent) internal virtual {
if (owner == address(0)) {
revert ERC20InvalidApprover(address(0));
}
if (spender == address(0)) {
revert ERC20InvalidSpender(address(0));
}
_allowances[owner][spender] = value;
if (emitEvent) {
emit Approval(owner, spender, value);
}
}
/**
* @dev Updates `owner` s allowance for `spender` based on spent `value`.
*
* Does not update the allowance value in case of infinite allowance.
* Revert if not enough allowance is available.
*
* Does not emit an {Approval} event.
*/
function _spendAllowance(address owner, address spender, uint256 value) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance < type(uint256).max) {
if (currentAllowance < value) {
revert ERC20InsufficientAllowance(spender, currentAllowance, value);
}
unchecked {
_approve(owner, spender, currentAllowance - value, false);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.20;
import {IERC20} from "../IERC20.sol";
/**
* @dev Interface for the optional metadata functions from the ERC-20 standard.
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.20;
/**
* @dev Interface of the ERC-20 standard as defined in the ERC.
*/
interface IERC20 {
/**
* @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);
/**
* @dev Returns the value of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the value of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves a `value` amount of tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 value) 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 a `value` amount of tokens 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 value) external returns (bool);
/**
* @dev Moves a `value` amount of tokens from `from` to `to` using the
* allowance mechanism. `value` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 value) external returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)
pragma solidity ^0.8.20;
/**
* @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 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.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
function _contextSuffixLength() internal view virtual returns (uint256) {
return 0;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;
import "./openzeppelin-contracts/contracts/access/Ownable.sol";
import "./openzeppelin-contracts/contracts/token/ERC20/ERC20.sol";
import "./interfaces/IOracle.sol";
import "./SoniccoinStorage.sol";
contract Soniccoin is ERC20, Ownable, SoniccoinStorage {
/// @notice Maximum supply of the token
uint256 public constant MAX_SUPPLY = 21000000e18; // 21 million
/// @notice Block interval for mining
uint256 public constant BLOCK_INTERVAL = 1 minutes;
uint256 public nonce;
uint256 public minimumEnergiesPerBlock;
bool public minimumEnergiesPerBlockActivated;
event Mine(uint256 indexed blockNumber, address indexed miner, uint256 mineCount);
event NewSONICBlock(uint256 indexed blockNumber);
event MiningRewardSet(uint256 indexed miningReward);
event MinerSelected(uint256 blockNumber, address selectedMiner, uint256 miningReward);
event FeeCollectorSet(address feeCollector);
event MineCostSet(uint256 mineCost);
event OracleSet(address oracle);
modifier whenStarted() {
require(isStarted, "not started");
_;
}
/**
* @notice Initializes the contract.
*/
constructor() ERC20("Sonic Coin", "SONIC") Ownable(msg.sender) {
mineCost = 0.2 ether; // 0.2 $S
miningReward = 200e18; // 200 SONIC
halvingInterval = 10080; // 10080 Soniccoin blocks, ~1 week
// Launch price at 0.40$ per SONIC
minimumEnergiesPerBlock = 340; // 0.40 * 200 = 80$ per block -> 80 / (0.2 * $S_price) = 340 energies per block
minimumEnergiesPerBlockActivated = true;
_mint(msg.sender, 2025000e18); // mint 2.025M Soniccoin
}
function getUserRandomNumber() internal returns (bytes32) {
nonce++;
return keccak256(abi.encodePacked(block.timestamp, msg.sender, nonce));
}
/**
* @notice Get the miners for a specific block.
* @param _blockNumber The block number
* @return The miners
*/
function minersOfBlock(uint256 _blockNumber) public view returns (address[] memory) {
return blocks[_blockNumber].miners;
}
/**
* @notice Get the miners for a specific block with a range.
* @dev This function is not recommended to use for on-chain purposes.
* @param _blockNumber The block number
* @param _from The start index
* @param _to The end index
* @return The miners
*/
function minersOfBlockWithRange(uint256 _blockNumber, uint256 _from, uint256 _to)
public
view
returns (address[] memory)
{
uint256 count = _to - _from;
address[] memory miners = new address[](count);
for (uint256 i = 0; i < count; i++) {
miners[i] = blocks[_blockNumber].miners[_from + i];
}
return miners;
}
/**
* @notice Get the number of miners for a specific block.
* @param _blockNumber The block number
* @return The number of miners
*/
function minersOfBlockCount(uint256 _blockNumber) public view returns (uint256) {
return blocks[_blockNumber].miners.length;
}
/**
* @notice Get the selected miner for a specific block.
* @param _blockNumber The block number
* @return The selected miner
*/
function selectedMinerOfBlock(uint256 _blockNumber) public view returns (address) {
return blocks[_blockNumber].selectedMiner;
}
/**
* @notice Get the next halving block.
* @return The next halving block
*/
function nextHalvingBlock() public view returns (uint256) {
return lastHalvingBlock + halvingInterval;
}
/**
* @notice Get the request ID for the target block.
* @param _blockNumber The target block number
* @return The request ID
*/
function getRequestIdByBlockNumber(uint256 _blockNumber) public view returns (uint256) {
return blockNumberToRequests[_blockNumber];
}
/**
* @notice Get the block number for the request ID.
* @param _requestId The request ID
* @return The block number
*/
function getBlockNumberByRequestId(uint256 _requestId) public view returns (uint256) {
return requestsToBlockNumber[_requestId];
}
/**
* @notice Mines the reward multiple times in the current block.
* @param mineCount The number of times to mine
*/
function mine(uint256 mineCount) public payable whenStarted {
require(mineCount > 0, "invalid mine count");
require(msg.value == mineCost * mineCount, "insufficient mine cost");
_mine(msg.sender, blockNumber + 1, mineCount);
_concludeBlock();
}
/**
* @notice Mines the reward multiple times in the future block.
* @param mineCount The number of times to mine per block
* @param blockCount The number of future blocks to mine
*/
function futureMine(uint256 mineCount, uint256 blockCount) public payable whenStarted {
require(mineCount > 0 && blockCount > 0, "invalid mine count or block count");
require(msg.value == mineCost * mineCount * blockCount, "insufficient mine cost");
uint256 targetBlock = blockNumber + 1;
for (uint256 i = 0; i < blockCount;) {
_mine(msg.sender, targetBlock + i, mineCount);
unchecked {
i++;
}
}
_concludeBlock();
}
/**
* @notice Starts the mining.
*/
function start() public onlyOwner {
require(!isStarted, "already initialized");
isStarted = true;
lastBlockTime = block.timestamp;
}
/**
* @notice Sets the mining reward.
* @param _miningReward The mining reward
*/
function setMiningReward(uint256 _miningReward) public onlyOwner {
require(!isStarted, "already initialized");
miningReward = _miningReward;
emit MiningRewardSet(_miningReward);
}
/**
* @notice Sets the fee collector address.
* @param _feeCollector The fee collector address
*/
function setFeeCollector(address _feeCollector) public onlyOwner {
feeCollector = _feeCollector;
emit FeeCollectorSet(_feeCollector);
}
/**
* @notice Adjusts the mine cost.
* @param _mineCost The mine cost
*/
function adjustMineCost(uint256 _mineCost) public onlyOwner {
mineCost = _mineCost;
emit MineCostSet(_mineCost);
}
/**
* @notice Sets the oracle.
* @param _oracle The oracle
*/
function setOracle(address _oracle) public onlyOwner {
oracle = _oracle;
emit OracleSet(_oracle);
}
function setMinimumEnergiesPerBlock(uint256 _minimumEnergiesPerBlock) public onlyOwner {
minimumEnergiesPerBlock = _minimumEnergiesPerBlock;
}
function setMinimumEnergiesPerBlockActivated(bool _minimumEnergiesPerBlockActivated) public onlyOwner {
minimumEnergiesPerBlockActivated = _minimumEnergiesPerBlockActivated;
}
/**
* @notice Collects the Ether.
* @param amount The amount of Ether to collect
*/
function collect(uint256 amount) public {
require(msg.sender == feeCollector, "only feeCollector can collect");
(bool sent,) = feeCollector.call{value: amount}("");
require(sent, "failed to send Ether");
}
/**
* @notice Oracle fulfills the randomness and selects the miner.
* @param sequenceNumber The sequence number from the oracle.
* @param randomNumber The random number provided by the oracle in bytes32 format.
*/
function fulfillRandomness(uint64 sequenceNumber, bytes32 randomNumber) public {
require(msg.sender == address(oracle), "only oracle can select miner");
uint256 targetBlock = requestsToBlockNumber[sequenceNumber];
Block storage blockData = blocks[targetBlock];
// Skip if the selected miner is already set.
if (blockData.selectedMiner != address(0)) {
return;
}
uint256 minerCount = minersOfBlockCount(targetBlock);
if (minerCount == 0) {
return;
}
// Convert bytes32 random number to uint256 and select miner based on index
uint256 randIdx = uint256(randomNumber) % minerCount;
address selectedMiner = blockData.miners[randIdx];
// Mint the mining reward.
if (totalSupply() + blockData.miningReward <= MAX_SUPPLY) {
_mint(selectedMiner, blockData.miningReward);
}
// Record the selected miner.
blockData.selectedMiner = selectedMiner;
emit MinerSelected(targetBlock, selectedMiner, blockData.miningReward);
}
/**
* @dev Concludes the block.
*/
function _concludeBlock() private {
uint256 nextBlockNumber = blockNumber + 1;
uint256 minerCount = minersOfBlockCount(nextBlockNumber);
bool hasMinimumEnergiesPerBlock = minimumEnergiesPerBlockActivated ? minerCount >= minimumEnergiesPerBlock : true;
if ((block.timestamp >= lastBlockTime + BLOCK_INTERVAL) && hasMinimumEnergiesPerBlock) {
// Proceed to the next block.
blockNumber++;
lastBlockTime = block.timestamp;
// Use block number or another unique identifier as the user-provided random seed
bytes32 userRandomNumber = getUserRandomNumber();
// bytes32 userRandomNumber = keccak256(abi.encodePacked(blockNumber));
// Call the oracle with the seed and get the sequence number as the request ID
uint64 sequenceNumber = IOracle(oracle).requestRandomness(userRandomNumber);
// Check if it's time for halving.
if (blockNumber >= nextHalvingBlock()) {
miningReward = miningReward / 2;
halvingInterval = halvingInterval * 2;
lastHalvingBlock = blockNumber;
}
blockNumberToRequests[blockNumber] = sequenceNumber;
requestsToBlockNumber[sequenceNumber] = blockNumber;
blocks[blockNumber].miningReward = miningReward;
emit NewSONICBlock(blockNumber);
}
}
/**
* @dev Mines the reward.
* @param user The user address
* @param targetBlock The target block number to mine
*/
function _mine(address user, uint256 targetBlock, uint256 counts) private {
for (uint256 i = 0; i < counts;) {
blocks[targetBlock].miners.push(user);
unchecked {
i++;
}
}
emit Mine(targetBlock, user, counts);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;
contract SoniccoinStorage {
/// @notice The flag to check if the mining is started
bool public isStarted;
/// @notice The cost to mine
uint256 public mineCost;
/// @notice The mining reward
uint256 public miningReward;
/// @notice The current block number
uint256 public blockNumber;
/// @notice The last block time
uint256 public lastBlockTime;
/// @notice The halving interval
uint256 public halvingInterval;
/// @notice The last halving block
uint256 public lastHalvingBlock;
/// @notice The fee collector address
address public feeCollector;
struct Block {
address[] miners;
address selectedMiner;
uint256 miningReward;
}
/// @notice The blocks data
mapping(uint256 => Block) public blocks;
/// @notice The block number to request ID mapping
mapping(uint256 => uint256) public blockNumberToRequests;
/// @notice The randomness oracle
address public oracle;
/// @notice The request ID to block number mapping
mapping(uint256 => uint256) public requestsToBlockNumber;
}