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snt-gas-relay
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Added logic for ExecuteGasRelayed

This commit is contained in:
Richard Ramos 2018-08-15 12:34:15 -04:00
parent d4d9ab1b96
commit c527ab4ef1
1 changed files with 25 additions and 3 deletions
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28
gas-relayer/src/strategy/SNTStrategy.js
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@ -1,6 +1,8 @@
const Strategy = require('./BaseStrategy');
const TransferSNT = "0x916b6511";
const ExecuteGasRelayed = "0x754e6ab0";
class SNTStrategy extends Strategy {
@ -21,13 +23,33 @@ class SNTStrategy extends Strategy {
const gas = this.web3.utils.toBN(estimatedGas);
const balance = await this.getBalance(message.input.wallet, token, message, token.address);
const value = this.web3.utils.toBN(params('_amount'));
const requiredGas = value.add(gas); // Adding 10% - TODO: tune this value
const requiredGas = value.add(gas);
if(balance.lt(requiredGas)){
return {success: false, message: "Address has not enough balance to transfer specified value + fees (" + requiredGas.toString() + ")"};
}
} else {
// TODO: logic is needed for executeGasRelayed.
} else if(message.input.functionName == ExecuteGasRelayed){
const latestBlock = await this.web3.eth.getBlock("latest");
let estimatedGas = 0;
try {
estimatedGas = await this._estimateGas(message, latestBlock.gasLimit);
} catch(exc){
if(exc.message.indexOf("revert") > -1) return {success: false, message: "Transaction will revert"};
}
const balance = await this.getBalance(message.input.wallet, token, message, token.address);
if(balance.lt(estimatedGas)){
return {success: false, message: "Address has not enough balance to execute the transaction (" + estimatedGas.toString() + ")"};
}
const gasMinimal = this.web3.utils.toBN(params('_gasMinimal'));
if(gasMinimal.lt(estimatedGas)){
return {success: false, message: "Gas minimal is less than estimated gas (" + estimatedGas.toString() + ")"};
}
if(balance.lt(gasMinimal)){
return {success: false, message: "Address has not enough balance for the specified _gasMinimal"};
}
}
return {