The standard token contract can be quite complex. But in essence a very basic token boils down to this:
Requirement:
go-wanchain <https://github.com/wanchain/go-wanchain>_ to get the latest versionRemix <https://remix.ethereum.org>_ which is an amazing online smart contract development IDESteps:
copy the script and run it in gwan console
var erc20simple_contract = web3.eth.contract([
{
"constant": true,
"inputs": [],
"name": "name",
"outputs": [
{
"name": "",
"type": "string"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
},
{
"constant": false,
"inputs": [
{
"name": "_spender",
"type": "address"
},
{
"name": "_value",
"type": "uint256"
}
],
"name": "approve",
"outputs": [
{
"name": "success",
"type": "bool"
}
],
"payable": false,
"stateMutability": "nonpayable",
"type": "function"
},
{
"constant": true,
"inputs": [],
"name": "totalSupply",
"outputs": [
{
"name": "",
"type": "uint256"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
},
{
"constant": false,
"inputs": [
{
"name": "_to",
"type": "address"
},
{
"name": "_toKey",
"type": "bytes"
},
{
"name": "_value",
"type": "uint256"
}
],
"name": "otatransfer",
"outputs": [
{
"name": "",
"type": "string"
}
],
"payable": false,
"stateMutability": "nonpayable",
"type": "function"
},
{
"constant": false,
"inputs": [
{
"name": "_from",
"type": "address"
},
{
"name": "_to",
"type": "address"
},
{
"name": "_value",
"type": "uint256"
}
],
"name": "transferFrom",
"outputs": [
{
"name": "success",
"type": "bool"
}
],
"payable": false,
"stateMutability": "nonpayable",
"type": "function"
},
{
"constant": true,
"inputs": [],
"name": "decimals",
"outputs": [
{
"name": "",
"type": "uint256"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
},
{
"constant": true,
"inputs": [
{
"name": "",
"type": "address"
}
],
"name": "privacyBalance",
"outputs": [
{
"name": "",
"type": "uint256"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
},
{
"constant": true,
"inputs": [
{
"name": "_owner",
"type": "address"
}
],
"name": "balanceOf",
"outputs": [
{
"name": "balance",
"type": "uint256"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
},
{
"constant": true,
"inputs": [],
"name": "symbol",
"outputs": [
{
"name": "",
"type": "string"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
},
{
"constant": false,
"inputs": [
{
"name": "initialBase",
"type": "address"
},
{
"name": "baseKeyBytes",
"type": "bytes"
},
{
"name": "value",
"type": "uint256"
}
],
"name": "initPrivacyAsset",
"outputs": [],
"payable": false,
"stateMutability": "nonpayable",
"type": "function"
},
{
"constant": false,
"inputs": [
{
"name": "_to",
"type": "address"
},
{
"name": "_value",
"type": "uint256"
}
],
"name": "transfer",
"outputs": [
{
"name": "success",
"type": "bool"
}
],
"payable": false,
"stateMutability": "nonpayable",
"type": "function"
},
{
"constant": true,
"inputs": [
{
"name": "_owner",
"type": "address"
}
],
"name": "otabalanceOf",
"outputs": [
{
"name": "balance",
"type": "uint256"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
},
{
"constant": true,
"inputs": [
{
"name": "_owner",
"type": "address"
},
{
"name": "_spender",
"type": "address"
}
],
"name": "allowance",
"outputs": [
{
"name": "remaining",
"type": "uint256"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
},
{
"constant": true,
"inputs": [
{
"name": "",
"type": "address"
}
],
"name": "otaKey",
"outputs": [
{
"name": "",
"type": "bytes"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
},
{
"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": "_owner",
"type": "address"
},
{
"indexed": true,
"name": "_spender",
"type": "address"
},
{
"indexed": false,
"name": "_value",
"type": "uint256"
}
],
"name": "Approval",
"type": "event"
}
])
var erc20simple = erc20simple_contract.new(
{
from: web3.eth.accounts[1],
data: '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',
gas: '4700000'
},
function (e, contract) {
console.log(e, contract);
if (typeof contract.address !== 'undefined') {
console.log('Contract mined! address: ' + contract.address + ' transactionHash: ' + contract.transactionHash);
}
}
)
After deployed above token contract on WANCHAIN,in the WANCHAIN console,you can invoke token privacy transaction according to following process:
Suppose there are at lease 3 accounts in your WANCHAIN node
Define asset function and variable
var initPriBalance = 10000;
var priTranValue = 888;
var wanBalance = function (addr) {
return web3.fromWin(web3.eth.getBalance(addr));
}
var wanUnlock = function (addr) {
return personal.unlockAccount(addr, "wanglu", 99999);
}
var sendWanFromUnlock = function (From, To, V) {
eth.sendTransaction({ from: From, to: To, value: web3.toWin(V) });
}
var wait = function (conditionFunc) {
var loopLimit = 130;
var loopTimes = 0;
while (!conditionFunc()) {
admin.sleep(2);
loopTimes++;
if (loopTimes >= loopLimit) {
throw Error("wait timeout! conditionFunc:" + conditionFunc)
}
}
}
wanUnlock(eth.accounts[1])
wanUnlock(eth.accounts[2])
stampBalance = 0.09;
buy stamp for token privacy transaction
abiDefStamp = [{ "constant": false, "type": "function", "stateMutability": "nonpayable", "inputs": [{ "name": "OtaAddr", "type": "string" }, { "name": "Value", "type": "uint256" }], "name": "buyStamp", "outputs": [{ "name": "OtaAddr", "type": "string" }, { "name": "Value", "type": "uint256" }] }, { "constant": false, "type": "function", "inputs": [{ "name": "RingSignedData", "type": "string" }, { "name": "Value", "type": "uint256" }], "name": "refundCoin", "outputs": [{ "name": "RingSignedData", "type": "string" }, { "name": "Value", "type": "uint256" }] }, { "constant": false, "type": "function", "stateMutability": "nonpayable", "inputs": [], "name": "getCoins", "outputs": [{ "name": "Value", "type": "uint256" }] }];
contractDef = eth.contract(abiDefStamp);
stampContractAddr = "0x00000000000000000000000000000000000000c8";
stampContract = contractDef.at(stampContractAddr);
var wanAddr = wan.getWanAddress(eth.accounts[1]);
var otaAddrStamp = wan.generateOneTimeAddress(wanAddr);
txBuyData = stampContract.buyStamp.getData(otaAddrStamp, web3.toWin(stampBalance));
sendTx = eth.sendTransaction({ from: eth.accounts[1], to: stampContractAddr, value: web3.toWin(stampBalance), data: txBuyData, gas: 1000000 });
wait(function () { return eth.getTransaction(sendTx).blockNumber != null; });
keyPairs = wan.computeOTAPPKeys(eth.accounts[1], otaAddrStamp).split('+');
privateKeyStamp = keyPairs[0];
get stamp mix set for ring sign
var mixStampAddresses = wan.getOTAMixSet(otaAddrStamp, 2);
var mixSetWith0x = []
for (i = 0; i < mixStampAddresses.length; i++) {
mixSetWith0x.push(mixStampAddresses[i])
}
define token contract ABI
var erc20simple_contract = web3.eth.contract([{ "constant": true, "inputs": [], "name": "name", "outputs": [{ "name": "", "type": "string" }], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [{ "name": "_spender", "type": "address" }, { "name": "_value", "type": "uint256" }], "name": "approve", "outputs": [{ "name": "success", "type": "bool" }], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [], "name": "totalSupply", "outputs": [{ "name": "", "type": "uint256" }], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [{ "name": "_to", "type": "address" }, { "name": "_toKey", "type": "bytes" }, { "name": "_value", "type": "uint256" }], "name": "otatransfer", "outputs": [{ "name": "", "type": "string" }], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [{ "name": "_from", "type": "address" }, { "name": "_to", "type": "address" }, { "name": "_value", "type": "uint256" }], "name": "transferFrom", "outputs": [{ "name": "success", "type": "bool" }], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [], "name": "decimals", "outputs": [{ "name": "", "type": "uint256" }], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [{ "name": "", "type": "address" }], "name": "privacyBalance", "outputs": [{ "name": "", "type": "uint256" }], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [{ "name": "_owner", "type": "address" }], "name": "balanceOf", "outputs": [{ "name": "balance", "type": "uint256" }], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "symbol", "outputs": [{ "name": "", "type": "string" }], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [{ "name": "initialBase", "type": "address" }, { "name": "baseKeyBytes", "type": "bytes" }, { "name": "value", "type": "uint256" }], "name": "initPrivacyAsset", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [{ "name": "_to", "type": "address" }, { "name": "_value", "type": "uint256" }], "name": "transfer", "outputs": [{ "name": "success", "type": "bool" }], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [{ "name": "_owner", "type": "address" }], "name": "otabalanceOf", "outputs": [{ "name": "balance", "type": "uint256" }], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [{ "name": "_owner", "type": "address" }, { "name": "_spender", "type": "address" }], "name": "allowance", "outputs": [{ "name": "remaining", "type": "uint256" }], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [{ "name": "", "type": "address" }], "name": "otaKey", "outputs": [{ "name": "", "type": "bytes" }], "payable": false, "stateMutability": "view", "type": "function" }, { "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": "_owner", "type": "address" }, { "indexed": true, "name": "_spender", "type": "address" }, { "indexed": false, "name": "_value", "type": "uint256" }], "name": "Approval", "type": "event" }]);
contractAddr = '0xa2e526a3632d225f15aa0592e00bed31a48c953d';
// this address should changed according to your contract deploy
erc20simple = erc20simple_contract.at(contractAddr)
create one time address for account1
var wanAddr = wan.getWanAddress(eth.accounts[1]);
var otaAddrTokenHolder = wan.generateOneTimeAddress(wanAddr);
keyPairs = wan.computeOTAPPKeys(eth.accounts[1], otaAddrTokenHolder).split('+');
privateKeyTokenHolder = keyPairs[0];
addrTokenHolder = keyPairs[2];
sendTx = erc20simple.initPrivacyAsset.sendTransaction(addrTokenHolder, otaAddrTokenHolder, '0x' + initPriBalance.toString(16), { from: eth.accounts[1], gas: 1000000 });
wait(function () { return eth.getTransaction(sendTx).blockNumber != null; });
ota1Balance = erc20simple.privacyBalance(addrTokenHolder)
if (ota1Balance != initPriBalance) {
throw Error('ota1 balance wrong! balance:' + ota1Balance + ', except:' + initPriBalance)
}
generate ring sign data
var hashMsg = addrTokenHolder
var ringSignData = personal.genRingSignData(hashMsg, privateKeyStamp, mixSetWith0x.join("+"))
create one time address for account2
var wanAddr = wan.getWanAddress(eth.accounts[2]);
var otaAddr4Account2 = wan.generateOneTimeAddress(wanAddr);
keyPairs = wan.computeOTAPPKeys(eth.accounts[2], otaAddr4Account2).split('+');
privateKeyOtaAcc2 = keyPairs[0];
addrOTAAcc2 = keyPairs[2];
generate token privacy transfer data
cxtInterfaceCallData = erc20simple.otatransfer.getData(addrOTAAcc2, otaAddr4Account2, priTranValue);
generate call token privacy transfer data
glueContractDef = eth.contract([{ "constant": false, "type": "function", "inputs": [{ "name": "RingSignedData", "type": "string" }, { "name": "CxtCallParams", "type": "bytes" }], "name": "combine", "outputs": [{ "name": "RingSignedData", "type": "string" }, { "name": "CxtCallParams", "type": "bytes" }] }]);
glueContract = glueContractDef.at("0x0000000000000000000000000000000000000000")
combinedData = glueContract.combine.getData(ringSignData, cxtInterfaceCallData)
send privacy transaction
sendTx = personal.sendPrivacyCxtTransaction({from:addrTokenHolder, to:contractAddr, value:0, data: combinedData, gasprice:'0x' + (200000000000).toString(16)}, privateKeyTokenHolder)
wait(function(){return eth.getTransaction(sendTx).blockNumber != null;});
check balance
ota2Balance = erc20simple.privacyBalance(addrOTAAcc2);
if (ota2Balance != priTranValue) {
throw Error("ota2 balance wrong. balance:" + ota2Balance + ", expect:" + priTranValue);
}
ota1Balance = erc20simple.privacyBalance(addrTokenHolder)
if (ota1Balance != initPriBalance - priTranValue) {
throw Error("ota2 balance wrong. balance:" + ota1Balance + ", expect:" + (initPriBalance - priTranValue));
}