status-im/snt-gas-relay
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Calculating gas limit

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This commit is contained in:
Richard Ramos 2018-04-17 13:25:25 -04:00
parent cae1b967ee
commit ac70ba2b8f
2 changed files with 11 additions and 12 deletions
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4
app/gas-relayer/config/config.json
View File

@ -42,7 +42,7 @@
"data": "_data",
"gasPrice": "_gasPrice",
"gasToken": "_gasToken",
"gasMinimal": "_gasMinimal",
"gasLimit": "_gasLimit",
"isToken": true,
"token": "_baseToken"
},
@ -53,7 +53,7 @@
"data": "_data",
"gasPrice": "_gasPrice",
"gasToken": "_gasToken",
"gasMinimal": "_gasMinimal",
"gasLimit": "_gasLimit",
"isToken": false
}
]

19
app/gas-relayer/src/service.js
View File

@ -158,10 +158,9 @@ const processMessages = async function(error, message, subscription){
}
const gasPrice = web3.utils.toBN(params[contract.allowedFunctions[functionName].gasPrice]);
const gasMinimal = web3.utils.toBN(params[contract.allowedFunctions[functionName].gasMinimal]);
const gasLimit = web3.utils.toBN(params[contract.allowedFunctions[functionName].gasLimit]);
// Determining balances of gasPrice
// Determining balances of token used
let balance;
if(token.symbol == "ETH")
balance = new web3.utils.BN(await web3.eth.getBalance(address));
@ -171,10 +170,6 @@ const processMessages = async function(error, message, subscription){
balance = new web3.utils.BN(await Token.methods.balanceOf(address).call());
}
if(balance.lt(web3.utils.toBN(gasPrice.mul(gasMinimal)))){
return reply("Not enough balance", message);
}
// Determine if enough balance for baseToken
if(contract.allowedFunctions[functionName].isToken){
const Token = new web3.eth.Contract(erc20ABI);
@ -193,14 +188,18 @@ const processMessages = async function(error, message, subscription){
factor = 1;
}
// TODO Determine cost of running function in ether
// TODO Determine if gas price offered is worth at least the minimum
const balanceInETH = balance.div(factor);
const gasLimitInETH = gasLimit.div(factor);
if(balanceInETH.lt(web3.utils.toBN(gasPrice.mul(gasLimit)))){
return reply("Not enough balance", message);
}
web3.eth.sendTransaction({
from: config.blockchain.account,
to: address,
value: 0,
data: payload
data: payload,
gasLimit: gasLimitInETH
})
.then(function(receipt){
return reply("Transaction mined;" + receipt.transactionHash, message);