diff --git a/src/constants/abi/erc20.json b/src/constants/abi/erc20.json
deleted file mode 100644
index 8da19b3..0000000
--- a/src/constants/abi/erc20.json
+++ /dev/null
@@ -1,196 +0,0 @@
-[
-  {
-    "inputs": [
-      { "internalType": "uint256", "name": "initialSupply", "type": "uint256" },
-      { "internalType": "uint8", "name": "initialDecimals", "type": "uint8" },
-      { "internalType": "string", "name": "tokenName", "type": "string" },
-      { "internalType": "string", "name": "tokenSymbol", "type": "string" }
-    ],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "constructor"
-  },
-  {
-    "anonymous": false,
-    "inputs": [
-      { "indexed": true, "internalType": "address", "name": "sender", "type": "address" },
-      { "indexed": true, "internalType": "address", "name": "spender", "type": "address" },
-      { "indexed": false, "internalType": "uint256", "name": "value", "type": "uint256" }
-    ],
-    "name": "Approval",
-    "type": "event"
-  },
-  {
-    "anonymous": false,
-    "inputs": [
-      { "indexed": true, "internalType": "address", "name": "from", "type": "address" },
-      { "indexed": true, "internalType": "address", "name": "to", "type": "address" },
-      { "indexed": false, "internalType": "uint256", "name": "value", "type": "uint256" }
-    ],
-    "name": "Transfer",
-    "type": "event"
-  },
-  {
-    "constant": true,
-    "inputs": [
-      { "internalType": "address", "name": "owner", "type": "address" },
-      { "internalType": "address", "name": "spender", "type": "address" }
-    ],
-    "name": "allowance",
-    "outputs": [{ "internalType": "uint256", "name": "", "type": "uint256" }],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [
-      { "internalType": "address", "name": "", "type": "address" },
-      { "internalType": "address", "name": "", "type": "address" }
-    ],
-    "name": "allowed",
-    "outputs": [{ "internalType": "uint256", "name": "", "type": "uint256" }],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": false,
-    "inputs": [
-      { "internalType": "address", "name": "spender", "type": "address" },
-      { "internalType": "uint256", "name": "amount", "type": "uint256" }
-    ],
-    "name": "approve",
-    "outputs": [{ "internalType": "bool", "name": "", "type": "bool" }],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [{ "internalType": "address", "name": "account", "type": "address" }],
-    "name": "balanceOf",
-    "outputs": [{ "internalType": "uint256", "name": "", "type": "uint256" }],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [{ "internalType": "address", "name": "", "type": "address" }],
-    "name": "balances",
-    "outputs": [{ "internalType": "uint256", "name": "", "type": "uint256" }],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [],
-    "name": "decimals",
-    "outputs": [{ "internalType": "uint8", "name": "", "type": "uint8" }],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [],
-    "name": "name",
-    "outputs": [{ "internalType": "string", "name": "", "type": "string" }],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [
-      { "internalType": "uint256", "name": "a", "type": "uint256" },
-      { "internalType": "uint256", "name": "b", "type": "uint256" }
-    ],
-    "name": "safeAdd",
-    "outputs": [{ "internalType": "uint256", "name": "c", "type": "uint256" }],
-    "payable": false,
-    "stateMutability": "pure",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [
-      { "internalType": "uint256", "name": "a", "type": "uint256" },
-      { "internalType": "uint256", "name": "b", "type": "uint256" }
-    ],
-    "name": "safeDiv",
-    "outputs": [{ "internalType": "uint256", "name": "c", "type": "uint256" }],
-    "payable": false,
-    "stateMutability": "pure",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [
-      { "internalType": "uint256", "name": "a", "type": "uint256" },
-      { "internalType": "uint256", "name": "b", "type": "uint256" }
-    ],
-    "name": "safeMul",
-    "outputs": [{ "internalType": "uint256", "name": "c", "type": "uint256" }],
-    "payable": false,
-    "stateMutability": "pure",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [
-      { "internalType": "uint256", "name": "a", "type": "uint256" },
-      { "internalType": "uint256", "name": "b", "type": "uint256" }
-    ],
-    "name": "safeSub",
-    "outputs": [{ "internalType": "uint256", "name": "c", "type": "uint256" }],
-    "payable": false,
-    "stateMutability": "pure",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [],
-    "name": "symbol",
-    "outputs": [{ "internalType": "string", "name": "", "type": "string" }],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [],
-    "name": "totalSupply",
-    "outputs": [{ "internalType": "uint256", "name": "", "type": "uint256" }],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": false,
-    "inputs": [
-      { "internalType": "address", "name": "to", "type": "address" },
-      { "internalType": "uint256", "name": "amount", "type": "uint256" }
-    ],
-    "name": "transfer",
-    "outputs": [{ "internalType": "bool", "name": "", "type": "bool" }],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": false,
-    "inputs": [
-      { "internalType": "address", "name": "from", "type": "address" },
-      { "internalType": "address", "name": "to", "type": "address" },
-      { "internalType": "uint256", "name": "amount", "type": "uint256" }
-    ],
-    "name": "transferFrom",
-    "outputs": [{ "internalType": "bool", "name": "", "type": "bool" }],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  }
-]