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Golem Network Token
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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.
Contents
- 1 Token Information
- 2 Token Contract Information
- 3 How To Watch The Token Contract In Ethereum Wallet / Mist
- 4 How To Watch The Token In Ethereum Wallet / Mist
- 5 Check Your Token Balance In EtherScan.io
- 6 How To Interact With The Token Smart Contract In Ethereum Wallet / Mist
- 7 The Token Contract Source Code
- 8 Source
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 }
