status-im/snt-gas-relay
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Adding token and balance verification

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This commit is contained in:
Richard Ramos 2018-04-11 15:31:14 -04:00
parent b38a1794cc
commit e958317031
2 changed files with 33 additions and 34 deletions
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4
app/gas-relayer/config/config.json
View File

@ -21,7 +21,7 @@
"name": "Ethereum",
"symbol": "ETH"
},
"0x00000000000000000000000000000000000ABeEF": {
"0x1d97fCe424c029Fc504a171918F934C6dBAcB6aE": {
"minRelayFactor": 1000000000000,
"name": "RandomToken",
"symbol": "RDN",
@ -41,6 +41,7 @@
"value": "_value",
"data": "_data",
"gasPrice": "_gasPrice",
"gasToken": "_gasToken",
"isToken": true,
"token": "_baseToken"
},
@ -50,6 +51,7 @@
"value": "_value",
"data": "_data",
"gasPrice": "_gasPrice",
"gasToken": "_gasToken",
"isToken": false
}
]

63
app/gas-relayer/src/service.js
View File

@ -144,15 +144,39 @@ const processMessages = async function(error, message, subscription){
return reply('Invalid contract code', message); // TODO Log this
}
const params = web3.eth.abi.decodeParameters(contract.allowedFunctions[functionName].inputs, functionParameters);
const tokenAddress = contract.allowedFunctions[functionName].isToken ? params[contract.allowedFunctions[functionName].token] : "0x0";
if(config.tokens[tokenAddress] == undefined){
const token = config.tokens[params[contract.allowedFunctions[functionName].gasToken]];
if(token == undefined){
return reply("Token not allowed", message);
}
const gasPrice = params[contract.allowedFunctions[functionName].gasPrice];
// Determining balances of gasPrice
let balance;
if(token.symbol == "ETH")
balance = new web3.utils.BN(await web3.eth.getBalance(address));
else {
const Token = new web3.eth.Contract(erc20ABI);
Token.options.address = params[contract.allowedFunctions[functionName].gasToken];
balance = new web3.utils.BN(await Token.methods.balanceOf(address).call());
}
if(balance.lt(web3.utils.toBN(gasPrice))){
return reply("Not enough balance", message);
}
// Determine if enough balance for baseToken
if(contract.allowedFunctions[functionName].isToken){
const Token = new web3.eth.Contract(erc20ABI);
Token.options.address = params[contract.allowedFunctions[functionName].token];
balance = new web3.utils.BN(await Token.methods.balanceOf(address).call());
if(balance.lt(web3.utils.BN(params[contract.allowedFunctions[functionName].value]))){
return reply("Not enough balance", message);
}
}
// Obtain factor
let factor;
if(contract.allowedFunctions[functionName].isToken){
@ -161,44 +185,17 @@ const processMessages = async function(error, message, subscription){
factor = 1;
}
// Determine if gas price offered is worth at least the minimum
// TODO Determine cost of running function in ether
// TODO Determine if gas price offered is worth at least the minimum
/*if(_________ < config.tokens[tokenAddress].minRelayFactor){
return reply("_gasPrice less than minimum", message);
}
if(gasPrice / factor < _______ ){
return reply("_gasPrice is too low", message);
}*/
/*
// Determining balances
let balance;
if(contract.isIdentity){
if(contract.allowedFunctions[functionName].isToken){
const Token = new web3.eth.Contract(erc20ABI, params[contract.allowedFunctions[functionName].token]);
balance = new web3.utils.BN(await Token.methods.balanceOf(address).call());
} else {
balance = new web3.utils.BN(await web3.eth.getBalance(address));
}
} else {
// TODO SNT Controller
}
*/
// Estimating gas
/*let estimatedGas = new web3.utils.BN(await web3.eth.estimateGas({
to: address,
data: params[contract.allowedFunctions[functionName].data]
}));*/
// TODO determine if balance is enough
web3.eth.sendTransaction({
from: config.blockchain.account,
to: address,