Token migration announcement. Streamr token contract has migrated to a new address.
ERC-20
Old Contract
Overview
Max Total Supply
104,159,259.093822289936641023 XDATA
Holders
444,338 ( -0.001%)
Market
Price
$0.06 @ 0.000015 ETH (+2.07%)
Onchain Market Cap
$6,276,532.79
Circulating Supply Market Cap
$42,007,818.00
Other Info
Token Contract (WITH 18 Decimals)
Balance
0.157010132606382936 XDATAValue
$0.01 ( ~2.5373895056344E-06 Eth) [0.0000%]Loading...
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This contract contains unverified libraries: SafeMathLib
This contract may be a proxy contract. Click on More Options and select Is this a proxy? to confirm and enable the "Read as Proxy" & "Write as Proxy" tabs.
Contract Name:
CrowdsaleToken
Compiler Version
v0.4.8+commit.60cc1668
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2017-07-24 */ /* * ERC20 interface * see https://github.com/ethereum/EIPs/issues/20 */ contract ERC20 { uint public totalSupply; function balanceOf(address who) constant returns (uint); function allowance(address owner, address spender) constant returns (uint); function transfer(address to, uint value) returns (bool ok); function transferFrom(address from, address to, uint value) returns (bool ok); function approve(address spender, uint value) returns (bool ok); event Transfer(address indexed from, address indexed to, uint value); event Approval(address indexed owner, address indexed spender, uint value); } /** * Math operations with safety checks */ contract SafeMath { function safeMul(uint a, uint b) internal returns (uint) { uint c = a * b; assert(a == 0 || c / a == b); return c; } function safeDiv(uint a, uint b) internal returns (uint) { assert(b > 0); uint c = a / b; assert(a == b * c + a % b); return c; } function safeSub(uint a, uint b) internal returns (uint) { assert(b <= a); return a - b; } function safeAdd(uint a, uint b) internal returns (uint) { uint c = a + b; assert(c>=a && c>=b); return c; } function max64(uint64 a, uint64 b) internal constant returns (uint64) { return a >= b ? a : b; } function min64(uint64 a, uint64 b) internal constant returns (uint64) { return a < b ? a : b; } function max256(uint256 a, uint256 b) internal constant returns (uint256) { return a >= b ? a : b; } function min256(uint256 a, uint256 b) internal constant returns (uint256) { return a < b ? a : b; } function assert(bool assertion) internal { if (!assertion) { throw; } } } /** * Standard ERC20 token with Short Hand Attack and approve() race condition mitigation. * * Based on code by FirstBlood: * https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol */ contract StandardToken is ERC20, SafeMath { /* Token supply got increased and a new owner received these tokens */ event Minted(address receiver, uint amount); /* Actual balances of token holders */ mapping(address => uint) balances; /* approve() allowances */ mapping (address => mapping (address => uint)) allowed; /* Interface declaration */ function isToken() public constant returns (bool weAre) { return true; } function transfer(address _to, uint _value) returns (bool success) { balances[msg.sender] = safeSub(balances[msg.sender], _value); balances[_to] = safeAdd(balances[_to], _value); Transfer(msg.sender, _to, _value); return true; } function transferFrom(address _from, address _to, uint _value) returns (bool success) { uint _allowance = allowed[_from][msg.sender]; balances[_to] = safeAdd(balances[_to], _value); balances[_from] = safeSub(balances[_from], _value); allowed[_from][msg.sender] = safeSub(_allowance, _value); Transfer(_from, _to, _value); return true; } function balanceOf(address _owner) constant returns (uint balance) { return balances[_owner]; } function approve(address _spender, uint _value) returns (bool success) { // To change the approve amount you first have to reduce the addresses` // allowance to zero by calling `approve(_spender, 0)` if it is not // already 0 to mitigate the race condition described here: // https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 if ((_value != 0) && (allowed[msg.sender][_spender] != 0)) throw; allowed[msg.sender][_spender] = _value; Approval(msg.sender, _spender, _value); return true; } function allowance(address _owner, address _spender) constant returns (uint remaining) { return allowed[_owner][_spender]; } } /** * Upgrade agent interface inspired by Lunyr. * * Upgrade agent transfers tokens to a new contract. * Upgrade agent itself can be the token contract, or just a middle man contract doing the heavy lifting. */ contract UpgradeAgent { uint public originalSupply; /** Interface marker */ function isUpgradeAgent() public constant returns (bool) { return true; } function upgradeFrom(address _from, uint256 _value) public; } /** * A token upgrade mechanism where users can opt-in amount of tokens to the next smart contract revision. * * First envisioned by Golem and Lunyr projects. */ contract UpgradeableToken is StandardToken { /** Contract / person who can set the upgrade path. This can be the same as team multisig wallet, as what it is with its default value. */ address public upgradeMaster; /** The next contract where the tokens will be migrated. */ UpgradeAgent public upgradeAgent; /** How many tokens we have upgraded by now. */ uint256 public totalUpgraded; /** * Upgrade states. * * - NotAllowed: The child contract has not reached a condition where the upgrade can bgun * - WaitingForAgent: Token allows upgrade, but we don't have a new agent yet * - ReadyToUpgrade: The agent is set, but not a single token has been upgraded yet * - Upgrading: Upgrade agent is set and the balance holders can upgrade their tokens * */ enum UpgradeState {Unknown, NotAllowed, WaitingForAgent, ReadyToUpgrade, Upgrading} /** * Somebody has upgraded some of his tokens. */ event Upgrade(address indexed _from, address indexed _to, uint256 _value); /** * New upgrade agent available. */ event UpgradeAgentSet(address agent); /** * Do not allow construction without upgrade master set. */ function UpgradeableToken(address _upgradeMaster) { upgradeMaster = _upgradeMaster; } /** * Allow the token holder to upgrade some of their tokens to a new contract. */ function upgrade(uint256 value) public { UpgradeState state = getUpgradeState(); if(!(state == UpgradeState.ReadyToUpgrade || state == UpgradeState.Upgrading)) { // Called in a bad state throw; } // Validate input value. if (value == 0) throw; balances[msg.sender] = safeSub(balances[msg.sender], value); // Take tokens out from circulation totalSupply = safeSub(totalSupply, value); totalUpgraded = safeAdd(totalUpgraded, value); // Upgrade agent reissues the tokens upgradeAgent.upgradeFrom(msg.sender, value); Upgrade(msg.sender, upgradeAgent, value); } /** * Set an upgrade agent that handles */ function setUpgradeAgent(address agent) external { if(!canUpgrade()) { // The token is not yet in a state that we could think upgrading throw; } if (agent == 0x0) throw; // Only a master can designate the next agent if (msg.sender != upgradeMaster) throw; // Upgrade has already begun for an agent if (getUpgradeState() == UpgradeState.Upgrading) throw; upgradeAgent = UpgradeAgent(agent); // Bad interface if(!upgradeAgent.isUpgradeAgent()) throw; // Make sure that token supplies match in source and target if (upgradeAgent.originalSupply() != totalSupply) throw; UpgradeAgentSet(upgradeAgent); } /** * Get the state of the token upgrade. */ function getUpgradeState() public constant returns(UpgradeState) { if(!canUpgrade()) return UpgradeState.NotAllowed; else if(address(upgradeAgent) == 0x00) return UpgradeState.WaitingForAgent; else if(totalUpgraded == 0) return UpgradeState.ReadyToUpgrade; else return UpgradeState.Upgrading; } /** * Change the upgrade master. * * This allows us to set a new owner for the upgrade mechanism. */ function setUpgradeMaster(address master) public { if (master == 0x0) throw; if (msg.sender != upgradeMaster) throw; upgradeMaster = master; } /** * Child contract can enable to provide the condition when the upgrade can begun. */ function canUpgrade() public constant returns(bool) { return true; } } /* * Ownable * * Base contract with an owner. * Provides onlyOwner modifier, which prevents function from running if it is called by anyone other than the owner. */ contract Ownable { address public owner; function Ownable() { owner = msg.sender; } modifier onlyOwner() { if (msg.sender != owner) { throw; } _; } function transferOwnership(address newOwner) onlyOwner { if (newOwner != address(0)) { owner = newOwner; } } } /** * Define interface for releasing the token transfer after a successful crowdsale. */ contract ReleasableToken is ERC20, Ownable { /* The finalizer contract that allows unlift the transfer limits on this token */ address public releaseAgent; /** A crowdsale contract can release us to the wild if ICO success. If false we are are in transfer lock up period.*/ bool public released = false; /** Map of agents that are allowed to transfer tokens regardless of the lock down period. These are crowdsale contracts and possible the team multisig itself. */ mapping (address => bool) public transferAgents; /** * Limit token transfer until the crowdsale is over. * */ modifier canTransfer(address _sender) { if(!released) { if(!transferAgents[_sender]) { throw; } } _; } /** * Set the contract that can call release and make the token transferable. * * Design choice. Allow reset the release agent to fix fat finger mistakes. */ function setReleaseAgent(address addr) onlyOwner inReleaseState(false) public { // We don't do interface check here as we might want to a normal wallet address to act as a release agent releaseAgent = addr; } /** * Owner can allow a particular address (a crowdsale contract) to transfer tokens despite the lock up period. */ function setTransferAgent(address addr, bool state) onlyOwner inReleaseState(false) public { transferAgents[addr] = state; } /** * One way function to release the tokens to the wild. * * Can be called only from the release agent that is the final ICO contract. It is only called if the crowdsale has been success (first milestone reached). */ function releaseTokenTransfer() public onlyReleaseAgent { released = true; } /** The function can be called only before or after the tokens have been releasesd */ modifier inReleaseState(bool releaseState) { if(releaseState != released) { throw; } _; } /** The function can be called only by a whitelisted release agent. */ modifier onlyReleaseAgent() { if(msg.sender != releaseAgent) { throw; } _; } function transfer(address _to, uint _value) canTransfer(msg.sender) returns (bool success) { // Call StandardToken.transfer() return super.transfer(_to, _value); } function transferFrom(address _from, address _to, uint _value) canTransfer(_from) returns (bool success) { // Call StandardToken.transferForm() return super.transferFrom(_from, _to, _value); } } /** * Safe unsigned safe math. * * https://blog.aragon.one/library-driven-development-in-solidity-2bebcaf88736#.750gwtwli * * Originally from https://raw.githubusercontent.com/AragonOne/zeppelin-solidity/master/contracts/SafeMathLib.sol * * Maintained here until merged to mainline zeppelin-solidity. * */ library SafeMathLib { function times(uint a, uint b) returns (uint) { uint c = a * b; assert(a == 0 || c / a == b); return c; } function minus(uint a, uint b) returns (uint) { assert(b <= a); return a - b; } function plus(uint a, uint b) returns (uint) { uint c = a + b; assert(c>=a); return c; } function assert(bool assertion) private { if (!assertion) throw; } } /** * A token that can increase its supply by another contract. * * This allows uncapped crowdsale by dynamically increasing the supply when money pours in. * Only mint agents, contracts whitelisted by owner, can mint new tokens. * */ contract MintableToken is StandardToken, Ownable { using SafeMathLib for uint; bool public mintingFinished = false; /** List of agents that are allowed to create new tokens */ mapping (address => bool) public mintAgents; event MintingAgentChanged(address addr, bool state ); /** * Create new tokens and allocate them to an address.. * * Only callably by a crowdsale contract (mint agent). */ function mint(address receiver, uint amount) onlyMintAgent canMint public { totalSupply = totalSupply.plus(amount); balances[receiver] = balances[receiver].plus(amount); // This will make the mint transaction apper in EtherScan.io // We can remove this after there is a standardized minting event Transfer(0, receiver, amount); } /** * Owner can allow a crowdsale contract to mint new tokens. */ function setMintAgent(address addr, bool state) onlyOwner canMint public { mintAgents[addr] = state; MintingAgentChanged(addr, state); } modifier onlyMintAgent() { // Only crowdsale contracts are allowed to mint new tokens if(!mintAgents[msg.sender]) { throw; } _; } /** Make sure we are not done yet. */ modifier canMint() { if(mintingFinished) throw; _; } } /** * A crowdsaled token. * * An ERC-20 token designed specifically for crowdsales with investor protection and further development path. * * - The token transfer() is disabled until the crowdsale is over * - The token contract gives an opt-in upgrade path to a new contract * - The same token can be part of several crowdsales through approve() mechanism * - The token can be capped (supply set in the constructor) or uncapped (crowdsale contract can mint new tokens) * */ contract CrowdsaleToken is ReleasableToken, MintableToken, UpgradeableToken { /** Name and symbol were updated. */ event UpdatedTokenInformation(string newName, string newSymbol); string public name; string public symbol; uint public decimals; /** * Construct the token. * * This token must be created through a team multisig wallet, so that it is owned by that wallet. * * @param _name Token name * @param _symbol Token symbol - should be all caps * @param _initialSupply How many tokens we start with * @param _decimals Number of decimal places * @param _mintable Are new tokens created over the crowdsale or do we distribute only the initial supply? Note that when the token becomes transferable the minting always ends. */ function CrowdsaleToken(string _name, string _symbol, uint _initialSupply, uint _decimals, bool _mintable) UpgradeableToken(msg.sender) { // Create any address, can be transferred // to team multisig via changeOwner(), // also remember to call setUpgradeMaster() owner = msg.sender; name = _name; symbol = _symbol; totalSupply = _initialSupply; decimals = _decimals; // Create initially all balance on the team multisig balances[owner] = totalSupply; if(totalSupply > 0) { Minted(owner, totalSupply); } // No more new supply allowed after the token creation if(!_mintable) { mintingFinished = true; if(totalSupply == 0) { throw; // Cannot create a token without supply and no minting } } } /** * When token is released to be transferable, enforce no new tokens can be created. */ function releaseTokenTransfer() public onlyReleaseAgent { mintingFinished = true; super.releaseTokenTransfer(); } /** * Allow upgrade agent functionality kick in only if the crowdsale was success. */ function canUpgrade() public constant returns(bool) { return released && super.canUpgrade(); } /** * Owner can update token information here. * * It is often useful to conceal the actual token association, until * the token operations, like central issuance or reissuance have been completed. * * This function allows the token owner to rename the token after the operations * have been completed and then point the audience to use the token contract. */ function setTokenInformation(string _name, string _symbol) onlyOwner { name = _name; symbol = _symbol; UpdatedTokenInformation(name, symbol); } }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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Contract Creation Code
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Deployed Bytecode
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000e0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000120000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000844415441636f696e00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000044441544100000000000000000000000000000000000000000000000000000000
-----Decoded View---------------
Arg [0] : _name (string): DATAcoin
Arg [1] : _symbol (string): DATA
Arg [2] : _initialSupply (uint256): 0
Arg [3] : _decimals (uint256): 18
Arg [4] : _mintable (bool): True
-----Encoded View---------------
9 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000e0
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000012
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000008
Arg [6] : 44415441636f696e000000000000000000000000000000000000000000000000
Arg [7] : 0000000000000000000000000000000000000000000000000000000000000004
Arg [8] : 4441544100000000000000000000000000000000000000000000000000000000
Swarm Source
bzzr://50db375aecbe9d707ae23fd4fe5268455eeced766ab05d58133ee11a1b16fa61
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