Golem Network Token

Golem Network Token is an Ethereum based ERC20 token which is paid by the user for renting computational power. Providers can freely set their price in GNT as the rental price. Since Golem works as a marketplace, therefore, these prices will reach equilibrium over time. GNT is also required to submit deposits to providers and for participation in the application registry.

Token Information

Website:	https://golem.network/
Forum:	https://golemproject.slack.com
Explorer:	https://etherscan.io/token/Golem
Exchanges:	https://coinmarketcap.com/assets/golem-network-tokens/#markets

Token Contract Information

Symbol:	GNT
Name:	Golem Network Token
Address:	0xa74476443119a942de498590fe1f2454d7d4ac0d
Decimal places:	18
Available supply:	820,000,000
Total supply:	1,000,000,000

How To Watch The Token Contract In Ethereum Wallet / Mist

In Ethereum Wallet / Mist, select the CONTRACTS tab and click WATCH CONTRACT to open the Watch contract window. Then:

Under CONTRACT NAME, enter GNT
Under CONTRACT ADDRESS, enter 0xa74476443119a942de498590fe1f2454d7d4ac0d
Copy the Application Binary Interface below and paste it into the JSON INTERFACE text box

[{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"golemFactory","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_master","type":"address"}],"name":"setMigrationMaster","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_value","type":"uint256"}],"name":"migrate","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"finalize","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"refund","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"migrationMaster","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"tokenCreationCap","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_agent","type":"address"}],"name":"setMigrationAgent","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"migrationAgent","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"fundingEndBlock","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"totalMigrated","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"tokenCreationMin","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"funding","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"tokenCreationRate","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"fundingStartBlock","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"create","outputs":[],"payable":true,"type":"function"},{"inputs":[{"name":"_golemFactory","type":"address"},{"name":"_migrationMaster","type":"address"},{"name":"_fundingStartBlock","type":"uint256"},{"name":"_fundingEndBlock","type":"uint256"}],"type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":true,"name":"_to","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":true,"name":"_to","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Migrate","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Refund","type":"event"}]

Click OK

How To Watch The Token In Ethereum Wallet / Mist

In Ethereum Wallet / Mist, select the CONTRACTS tab and click WATCH TOKEN to open the Add token window. Then:

Under TOKEN CONTRACT ADDRESS, enter 0xa74476443119a942de498590fe1f2454d7d4ac0d. The additional fields should automatically be filled in.

Click OK

Check Your Token Balance In EtherScan.io

Navigate to https://etherscan.io/. Then:

Select the menu TOKEN -> View Tokens
Select GOLEM
Select the Read Contract tab
In the balanceOf field, enter the address you want to check the token balance of
Click Query

A simpler way to check your token balance is to navigate to https://etherscan.io/. Then:

Enter your address into the search box on the top right of the screen
Press ENTER
Click on the View Token Balances dropdown

How To Interact With The Token Smart Contract In Ethereum Wallet / Mist

How To Check Your Token Balance In Ethereum Wallet / Mist

Watch the Contract and Watch the Token as described above. Then:

View the GNT contract
Click on SHOW CONTRACT INFO
In the READ FROM CONTRACT section and under Balance of:
- Enter the address you want to check the token balance of
- The token balance will be displayed in the Natural Units with 18 decimal places. e.g., 806451612903225800000 is 806451612903225800000 / 1e18 = 806.4516129032258 token units

How To Transfer Your Tokens In Ethereum Wallet / Mist

Watch the Contract and Watch the Token as described above. Then:

View the GNT contract
Click on SHOW CONTRACT INFO
In the WRITE TO CONTRACT section and under Select function:
- Select the Transfer function
- Under to, enter the address you want to transfer your tokens to
- Under value', enter the amount of tokens you want to transfer. This amount needs to be specified in the Natural Units with 18 decimal places. e.g., 1230000000000000000 is 1230000000000000000 / 1e18 = 1.23 GNTs
- Under Execute from, select the account you want to transfer your tokens from
- Click on Execute, then confirm your transaction

The Token Contract Source Code

Following is the source code from 0xa74476443119a942de498590fe1f2454d7d4ac0d:

 1 pragma solidity ^0.4.4;  2   3   4 /// @title Golem Network Token (GNT) - crowdfunding code for Golem Project  5 contract GolemNetworkToken {  6  string public constant name = "Golem Network Token";  7  string public constant symbol = "GNT";  8  uint8 public constant decimals = 18; // 18 decimal places, the same as ETH.  9   10  uint256 public constant tokenCreationRate = 1000;  11   12  // The funding cap in weis.  13  uint256 public constant tokenCreationCap = 820000 ether * tokenCreationRate;  14  uint256 public constant tokenCreationMin = 150000 ether * tokenCreationRate;  15   16  uint256 public fundingStartBlock;  17  uint256 public fundingEndBlock;  18   19  // The flag indicates if the GNT contract is in Funding state.  20  bool public funding = true;  21   22  // Receives ETH and its own GNT endowment.  23  address public golemFactory;  24   25  // Has control over token migration to next version of token.  26  address public migrationMaster;  27   28  GNTAllocation lockedAllocation;  29   30  // The current total token supply.  31  uint256 totalTokens;  32   33  mapping (address => uint256) balances;  34   35  address public migrationAgent;  36  uint256 public totalMigrated;  37   38  event Transfer(address indexed _from, address indexed _to, uint256 _value);  39  event Migrate(address indexed _from, address indexed _to, uint256 _value);  40  event Refund(address indexed _from, uint256 _value);  41   42  function GolemNetworkToken(address _golemFactory,  43  address _migrationMaster,  44  uint256 _fundingStartBlock,  45  uint256 _fundingEndBlock) {  46   47  if (_golemFactory == 0) throw;  48  if (_migrationMaster == 0) throw;  49  if (_fundingStartBlock <= block.number) throw;  50  if (_fundingEndBlock <= _fundingStartBlock) throw;  51   52  lockedAllocation = new GNTAllocation(_golemFactory);  53  migrationMaster = _migrationMaster;  54  golemFactory = _golemFactory;  55  fundingStartBlock = _fundingStartBlock;  56  fundingEndBlock = _fundingEndBlock;  57  }  58   59  /// @notice Transfer `_value` GNT tokens from sender's account  60  /// `msg.sender` to provided account address `_to`.  61  /// @notice This function is disabled during the funding.  62  /// @dev Required state: Operational  63  /// @param _to The address of the tokens recipient  64  /// @param _value The amount of token to be transferred  65  /// @return Whether the transfer was successful or not  66  function transfer(address _to, uint256 _value) returns (bool) {  67  // Abort if not in Operational state.  68  if (funding) throw;  69   70  var senderBalance = balances[msg.sender];  71  if (senderBalance >= _value && _value > 0) {  72  senderBalance -= _value;  73  balances[msg.sender] = senderBalance;  74  balances[_to] += _value;  75  Transfer(msg.sender, _to, _value);  76  return true;  77  }  78  return false;  79  }  80   81  function totalSupply() external constant returns (uint256) {  82  return totalTokens;  83  }  84   85  function balanceOf(address _owner) external constant returns (uint256) {  86  return balances[_owner];  87  }  88   89  // Token migration support:  90   91  /// @notice Migrate tokens to the new token contract.  92  /// @dev Required state: Operational Migration  93  /// @param _value The amount of token to be migrated  94  function migrate(uint256 _value) external {  95  // Abort if not in Operational Migration state.  96  if (funding) throw;  97  if (migrationAgent == 0) throw;  98   99  // Validate input value. 100  if (_value == 0) throw; 101  if (_value > balances[msg.sender]) throw; 102  103  balances[msg.sender] -= _value; 104  totalTokens -= _value; 105  totalMigrated += _value; 106  MigrationAgent(migrationAgent).migrateFrom(msg.sender, _value); 107  Migrate(msg.sender, migrationAgent, _value); 108  } 109  110  /// @notice Set address of migration target contract and enable migration 111  /// process. 112  /// @dev Required state: Operational Normal 113  /// @dev State transition: -> Operational Migration 114  /// @param _agent The address of the MigrationAgent contract 115  function setMigrationAgent(address _agent) external { 116  // Abort if not in Operational Normal state. 117  if (funding) throw; 118  if (migrationAgent != 0) throw; 119  if (msg.sender != migrationMaster) throw; 120  migrationAgent = _agent; 121  } 122  123  function setMigrationMaster(address _master) external { 124  if (msg.sender != migrationMaster) throw; 125  if (_master == 0) throw; 126  migrationMaster = _master; 127  } 128  129  // Crowdfunding: 130  131  /// @notice Create tokens when funding is active. 132  /// @dev Required state: Funding Active 133  /// @dev State transition: -> Funding Success (only if cap reached) 134  function create() payable external { 135  // Abort if not in Funding Active state. 136  // The checks are split (instead of using or operator) because it is 137  // cheaper this way. 138  if (!funding) throw; 139  if (block.number < fundingStartBlock) throw; 140  if (block.number > fundingEndBlock) throw; 141  142  // Do not allow creating 0 or more than the cap tokens. 143  if (msg.value == 0) throw; 144  if (msg.value > (tokenCreationCap - totalTokens) / tokenCreationRate) 145  throw; 146  147  var numTokens = msg.value * tokenCreationRate; 148  totalTokens += numTokens; 149  150  // Assign new tokens to the sender 151  balances[msg.sender] += numTokens; 152  153  // Log token creation event 154  Transfer(0, msg.sender, numTokens); 155  } 156  157  /// @notice Finalize crowdfunding 158  /// @dev If cap was reached or crowdfunding has ended then: 159  /// create GNT for the Golem Factory and developer, 160  /// transfer ETH to the Golem Factory address. 161  /// @dev Required state: Funding Success 162  /// @dev State transition: -> Operational Normal 163  function finalize() external { 164  // Abort if not in Funding Success state. 165  if (!funding) throw; 166  if ((block.number <= fundingEndBlock || 167  totalTokens < tokenCreationMin) && 168  totalTokens < tokenCreationCap) throw; 169  170  // Switch to Operational state. This is the only place this can happen. 171  funding = false; 172  173  // Create additional GNT for the Golem Factory and developers as 174  // the 18% of total number of tokens. 175  // All additional tokens are transfered to the account controller by 176  // GNTAllocation contract which will not allow using them for 6 months. 177  uint256 percentOfTotal = 18; 178  uint256 additionalTokens = 179  totalTokens * percentOfTotal / (100 - percentOfTotal); 180  totalTokens += additionalTokens; 181  balances[lockedAllocation] += additionalTokens; 182  Transfer(0, lockedAllocation, additionalTokens); 183  184  // Transfer ETH to the Golem Factory address. 185  if (!golemFactory.send(this.balance)) throw; 186  } 187  188  /// @notice Get back the ether sent during the funding in case the funding 189  /// has not reached the minimum level. 190  /// @dev Required state: Funding Failure 191  function refund() external { 192  // Abort if not in Funding Failure state. 193  if (!funding) throw; 194  if (block.number <= fundingEndBlock) throw; 195  if (totalTokens >= tokenCreationMin) throw; 196  197  var gntValue = balances[msg.sender]; 198  if (gntValue == 0) throw; 199  balances[msg.sender] = 0; 200  totalTokens -= gntValue; 201  202  var ethValue = gntValue / tokenCreationRate; 203  Refund(msg.sender, ethValue); 204  if (!msg.sender.send(ethValue)) throw; 205  } 206 } 207  208  209 /// @title Migration Agent interface 210 contract MigrationAgent { 211  function migrateFrom(address _from, uint256 _value); 212 } 213  214  215 /// @title GNT Allocation - Time-locked vault of tokens allocated 216 /// to developers and Golem Factory 217 contract GNTAllocation { 218  // Total number of allocations to distribute additional tokens among 219  // developers and the Golem Factory. The Golem Factory has right to 20000 220  // allocations, developers to 10000 allocations, divides among individual 221  // developers by numbers specified in `allocations` table. 222  uint256 constant totalAllocations = 30000; 223  224  // Addresses of developer and the Golem Factory to allocations mapping. 225  mapping (address => uint256) allocations; 226  227  GolemNetworkToken gnt; 228  uint256 unlockedAt; 229  230  uint256 tokensCreated = 0; 231  232  function GNTAllocation(address _golemFactory) internal { 233  gnt = GolemNetworkToken(msg.sender); 234  unlockedAt = now + 6 * 30 days; 235  236  // For the Golem Factory: 237  allocations[_golemFactory] = 20000; // 12/18 pp of 30000 allocations. 238  239  // For developers: 240  allocations[0x9d3F257827B17161a098d380822fa2614FF540c8] = 2500; // 25.0% of developers' allocations (10000). 241  allocations[0xd7406E50b73972Fa4aa533a881af68B623Ba3F66] = 730; // 7.3% of developers' allocations. 242  allocations[0xd15356D05A7990dE7eC94304B0fD538e550c09C0] = 730; 243  allocations[0x3971D17B62b825b151760E2451F818BfB64489A7] = 730; 244  allocations[0x95e337d09f1bc67681b1cab7ed1125ea2bae5ca8] = 730; 245  allocations[0x0025C58dB686b8CEce05CB8c50C1858b63Aa396E] = 730; 246  allocations[0xB127FC62dE6ca30aAc9D551591daEDdeBB2eFD7A] = 630; // 6.3% of developers' allocations. 247  allocations[0x21AF2E2c240a71E9fB84e90d71c2B2AddE0D0e81] = 630; 248  allocations[0x682AA1C3b3E102ACB9c97B861d595F9fbfF0f1B8] = 630; 249  allocations[0x6edd429c77803606cBd6Bb501CC701a6CAD6be01] = 630; 250  allocations[0x5E455624372FE11b39464e93d41D1F6578c3D9f6] = 310; // 3.1% of developers' allocations. 251  allocations[0xB7c7EaD515Ca275d53e30B39D8EBEdb3F19dA244] = 138; // 1.38% of developers' allocations. 252  allocations[0xD513b1c3fe31F3Fe0b1E42aa8F55e903F19f1730] = 135; // 1.35% of developers' allocations. 253  allocations[0x70cac7f8E404EEFce6526823452e428b5Ab09b00] = 100; // 1.0% of developers' allocations. 254  allocations[0xe0d5861e7be0fac6c85ecde6e8bf76b046a96149] = 100; 255  allocations[0x17488694D2feE4377Ec718836bb9d4910E81D9Cf] = 100; 256  allocations[0xb481372086dEc3ca2FCCD3EB2f462c9C893Ef3C5] = 100; 257  allocations[0xFB6D91E69CD7990651f26a3aa9f8d5a89159fC92] = 70; // 0.7% of developers' allocations. 258  allocations[0xE2ABdAe2980a1447F445cb962f9c0bef1B63EE13] = 70; 259  allocations[0x729A5c0232712caAf365fDd03c39cb361Bd41b1C] = 70; 260  allocations[0x12FBD8fef4903f62e30dD79AC7F439F573E02697] = 70; 261  allocations[0x657013005e5cFAF76f75d03b465cE085d402469A] = 42; // 0.42% of developers' allocations. 262  allocations[0xD0AF9f75EA618163944585bF56aCA98204d0AB66] = 25; // 0.25% of developers' allocations. 263  } 264  265  /// @notice Allow developer to unlock allocated tokens by transferring them 266  /// from GNTAllocation to developer's address. 267  function unlock() external { 268  if (now < unlockedAt) throw; 269  270  // During first unlock attempt fetch total number of locked tokens. 271  if (tokensCreated == 0) 272  tokensCreated = gnt.balanceOf(this); 273  274  var allocation = allocations[msg.sender]; 275  allocations[msg.sender] = 0; 276  var toTransfer = tokensCreated * allocation / totalAllocations; 277  278  // Will fail if allocation (and therefore toTransfer) is 0. 279  if (!gnt.transfer(msg.sender, toTransfer)) throw; 280  } 281 }

Source

http://theethereum.wiki/