diff --git a/src/constants/abi.ts b/src/constants/abi.ts
new file mode 100644
index 0000000..8cf651f
--- /dev/null
+++ b/src/constants/abi.ts
@@ -0,0 +1,222 @@
+export const erc20 = [
+  {
+    "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"
+  }
+] as const;