diff --git a/examples/exex/evm/erc20.json b/examples/exex/evm/erc20.json
index 06b572ddc2..a3de7b8f38 100644
--- a/examples/exex/evm/erc20.json
+++ b/examples/exex/evm/erc20.json
@@ -1,222 +1 @@
-[
-    {
-        "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": "",
-                "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": "_from",
-                "type": "address"
-            },
-            {
-                "name": "_to",
-                "type": "address"
-            },
-            {
-                "name": "_value",
-                "type": "uint256"
-            }
-        ],
-        "name": "transferFrom",
-        "outputs": [
-            {
-                "name": "",
-                "type": "bool"
-            }
-        ],
-        "payable": false,
-        "stateMutability": "nonpayable",
-        "type": "function"
-    },
-    {
-        "constant": true,
-        "inputs": [],
-        "name": "decimals",
-        "outputs": [
-            {
-                "name": "",
-                "type": "uint8"
-            }
-        ],
-        "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": "_to",
-                "type": "address"
-            },
-            {
-                "name": "_value",
-                "type": "uint256"
-            }
-        ],
-        "name": "transfer",
-        "outputs": [
-            {
-                "name": "",
-                "type": "bool"
-            }
-        ],
-        "payable": false,
-        "stateMutability": "nonpayable",
-        "type": "function"
-    },
-    {
-        "constant": true,
-        "inputs": [
-            {
-                "name": "_owner",
-                "type": "address"
-            },
-            {
-                "name": "_spender",
-                "type": "address"
-            }
-        ],
-        "name": "allowance",
-        "outputs": [
-            {
-                "name": "",
-                "type": "uint256"
-            }
-        ],
-        "payable": false,
-        "stateMutability": "view",
-        "type": "function"
-    },
-    {
-        "payable": true,
-        "stateMutability": "payable",
-        "type": "fallback"
-    },
-    {
-        "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"
-    },
-    {
-        "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"
-    }
-]
+[{"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":"","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":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"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":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"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"},{"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"}]