diff --git a/app/gas-relayer/config/config.json b/app/gas-relayer/config/config.json
index db52f50..d41111c 100644
--- a/app/gas-relayer/config/config.json
+++ b/app/gas-relayer/config/config.json
@@ -15,10 +15,24 @@
         "powTime": 1000
     },
 
+    "tokens": {
+        "0x0": {
+            "minRelayFactor": 1,
+            "name": "Ethereum",
+            "symbol": "ETH"
+        },
+        "0x0ABEEF": {
+            "minRelayFactor": 1000000000000,
+            "name": "RandomToken",
+            "symbol": "RDN",
+            "pricePlugin": "plugins/token-utils"
+        }
+    },
+
     "contracts":{
         "IdentityGasRelay": {
             "isIdentity": true,
-            "factoryAddress": "0x24cb6a5b6c81e8ce3edb059ab97984c3d3ea2e3e",
+            "factoryAddress": "0x96f0811c6484c59c2674da1f64e725c01d82c1b5",
             "abiFile": "../abi/IdentityGasRelay.json",
             "allowedFunctions": [
                 { 
@@ -26,6 +40,7 @@
                     "to": "_to",
                     "value": "_value",
                     "data": "_data",
+                    "gasPrice": "_gasPrice",
                     "isToken": true,
                     "token": "_baseToken"
                 },
@@ -34,6 +49,7 @@
                     "to": "_to",
                     "value": "_value",
                     "data": "_data",
+                    "gasPrice": "_gasPrice",
                     "isToken": false
                 }
             ]
diff --git a/app/gas-relayer/plugins/token-utils.js b/app/gas-relayer/plugins/token-utils.js
new file mode 100644
index 0000000..6d210f6
--- /dev/null
+++ b/app/gas-relayer/plugins/token-utils.js
@@ -0,0 +1,15 @@
+class TokenUtils {
+    constructor(tokenConfig){
+        this.name = tokenConfig.name || "";
+        this.symbol = tokenConfig.symbol || "";
+        this.minRelayFactor = tokenConfig.minRelayFactor || 1;
+    }
+
+    getFactor(){
+        // TODO get price from somewhere
+        return 100000;
+    }
+}
+
+
+module.exports = TokenUtils;
\ No newline at end of file
diff --git a/app/gas-relayer/src/service.js b/app/gas-relayer/src/service.js
index 22e6adc..59a7420 100644
--- a/app/gas-relayer/src/service.js
+++ b/app/gas-relayer/src/service.js
@@ -136,12 +136,34 @@ const processMessages = async function(error, message, subscription){
       return reply('Invalid contract code', message); // TODO Log this
     }
     
-    // Determining balances
+    
     const params = web3.eth.abi.decodeParameters(contract.allowedFunctions[functionName].inputs, functionParameters);
+    const tokenAddress = contract.allowedFunctions[functionName].isToken ? params[contract.allowedFunctions[functionName].token] : "0x0";
+    
+    // Determine if gas price offered is worth at least the minimum
+    const gasPrice = params[contract.allowedFunctions[functionName].gasPrice];
+    if(gasPrice < config.tokens[tokenAddress].minRelayFactor){
+      return reply("_gasPrice less than minimum: ", config.tokens[tokenAddress.minRelayFactor]);
+    }
+
+    // Obtain factor
+    let factor;
+    if(contract.allowedFunctions[functionName].isToken){
+      const PricePlugin = require(config.tokens[tokenAddress].pricePlugin);
+      const pricePlg = new PricePlugin(config.tokens)
+      factor = pricePlg.getFactor();
+    } else {
+      factor = 1;
+    }
+
+    console.log(factor);
+   
+   /*
+    // Determining balances
     let balance;
     if(contract.isIdentity){
       if(contract.allowedFunctions[functionName].isToken){
-        const Token = new web3.eth.Contract(erc20ABI, params[contracts.allowedFunctions[functionName].token]);
+        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));
@@ -149,14 +171,15 @@ const processMessages = async function(error, message, subscription){
     } else {
       // TODO SNT Controller
     }
+    */
 
-    // Estimating gas
-    let estimatedGas = new web3.utils.BN(await web3.eth.estimateGas({
-      to: address,
-      data: params[contracts.allowedFunctions[functionName].data]
-    }));
     
-
+    // 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({