diff --git a/API_DOC.md b/API_DOC.md
index 5e338ad..e386ffb 100644
--- a/API_DOC.md
+++ b/API_DOC.md
@@ -37,9 +37,9 @@ Get the http and websocket url which ReBirth connected.
 
 ```ruby
 {
-  result: {
-    http_url: "http://localhost:1337",
-    ws_url: "http://localhost:4337"
+  "result": {
+    "http_url": "http://localhost:1337",
+    "ws_url": "http://localhost:4337"
   }
 }
 ```
@@ -73,37 +73,37 @@ Also Support camelCase.
 
 ```ruby
 {
-    "result": {
-        "blocks": [
-            {
-                "version": 0,
-                "header": {
-                    "proof": {
-                        "Bft": {
-                            "round": 0,
-                            "height": 111198,
-                            "commits": {
-                                "0x31042d4f7662cddf8ded5229db3c5e7302875e10": "0x8132cc5090329854a7dc22300b45c5d972f02a1e558e0b1fa71916316ad2fe061c06829b8b5eb16a7d206f421061a392cd6aad7a1d0a05a8c3e7203fe78a181e00",
-                                "0x486bb688c8d29056bd7f87c26733048b0a6abda6": "0x4aa508798a0b9b77cc1263ae6b64d78977909fd2ce28e4f9322369041a3175cc4f7ad376b122c4b201dc6d2910c515f3d6d94c35dbd13fa6207a91fa8fd649b400",
-                                "0x71b028e49c6f41aaa74932d703c707ecca6d732e": "0xc1e580fa36b0ae5740ca66b612df6d3435c29d20fa21292c93a8bacd7751eee87984a3720576dbad15527bd3a52c9cda42a2d58a382701ab835add5e11bbed1001"
-                            },
-                            "proposal": "0xc880eb00df297b3c96bc08dca378280f99955816c6f32c08c17f004c0c7dfe75"
-                        }
-                    },
-                    "number": "0x1b25f",
-                    "quotaUsed": "0x0",
-                    "prevHash": "0x4bf32733fa6ca03326f0cfe7c487d7f8de26ad7c38fcf68959eebc2c0088e279",
-                    "proposer": "0x31042d4f7662cddf8ded5229db3c5e7302875e10",
-                    "stateRoot": "0x7e51d4969381493124b457e57db6dcab48c741a5046c327a43b59593d6a4ab16",
-                    "timestamp": 1532648718735,
-                    "receiptsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
-                    "transactionsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"
-                },
-                "transactionsCount": 0,
-                "hash": "0x06208c3b241ff5b8a1fcdec9190abf0cc861d1e5ecdd4f696892fe7ee972473f"
+  "result": {
+    "blocks": [
+      {
+        "version": 0,
+        "header": {
+          "proof": {
+            "Bft": {
+              "round": 0,
+              "height": 111198,
+              "commits": {
+                "0x31042d4f7662cddf8ded5229db3c5e7302875e10": "0x8132cc5090329854a7dc22300b45c5d972f02a1e558e0b1fa71916316ad2fe061c06829b8b5eb16a7d206f421061a392cd6aad7a1d0a05a8c3e7203fe78a181e00",
+                "0x486bb688c8d29056bd7f87c26733048b0a6abda6": "0x4aa508798a0b9b77cc1263ae6b64d78977909fd2ce28e4f9322369041a3175cc4f7ad376b122c4b201dc6d2910c515f3d6d94c35dbd13fa6207a91fa8fd649b400",
+                "0x71b028e49c6f41aaa74932d703c707ecca6d732e": "0xc1e580fa36b0ae5740ca66b612df6d3435c29d20fa21292c93a8bacd7751eee87984a3720576dbad15527bd3a52c9cda42a2d58a382701ab835add5e11bbed1001"
+              },
+              "proposal": "0xc880eb00df297b3c96bc08dca378280f99955816c6f32c08c17f004c0c7dfe75"
             }
-        ]
-    }
+          },
+          "number": "0x1b25f",
+          "quotaUsed": "0x0",
+          "prevHash": "0x4bf32733fa6ca03326f0cfe7c487d7f8de26ad7c38fcf68959eebc2c0088e279",
+          "proposer": "0x31042d4f7662cddf8ded5229db3c5e7302875e10",
+          "stateRoot": "0x7e51d4969381493124b457e57db6dcab48c741a5046c327a43b59593d6a4ab16",
+          "timestamp": 1532648718735,
+          "receiptsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
+          "transactionsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"
+        },
+        "transactionsCount": 0,
+        "hash": "0x06208c3b241ff5b8a1fcdec9190abf0cc861d1e5ecdd4f696892fe7ee972473f"
+      }
+    ]
+  }
 }
 ```
 
@@ -133,25 +133,25 @@ Get transactions list and paginate it.
 
 ```ruby
 {
-    "result": {
-        "count": 75178,
-        "transactions": [
-            {
-                "value": "0x0000000000000000000000000000000000000000000000000000000000000000", # 0 if valueFormat=decimal
-                "to": "0xffffffffffffffffffffffffffffffffff010001",
-                "gasUsed": "0x45754",
-                "quotaUsed": "0x45754",
-                "from": "0x35f8ca15fdeb958d9ad60537bec5e35444dd6d93",
-                "content": "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",
-                "blockNumber": "0xffff",
-                "hash": "0xf005a3585f9cfce03c7e428b9221eccdedeeae2736c8496c03113f90633135d8",
-                "timestamp": 1532511655997,
-                "chainId": 1,
-                "chainName": "test-chain",
-                "errorMessage": "Not enough base gas."
-            }
-        ]
-    }
+  "result": {
+    "count": 75178,
+    "transactions": [
+      {
+        "value": "0x0000000000000000000000000000000000000000000000000000000000000000", # 0 if valueFormat=decimal
+        "to": "0xffffffffffffffffffffffffffffffffff010001",
+        "gasUsed": "0x45754",
+        "quotaUsed": "0x45754",
+        "from": "0x35f8ca15fdeb958d9ad60537bec5e35444dd6d93",
+        "content": "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",
+        "blockNumber": "0xffff",
+        "hash": "0xf005a3585f9cfce03c7e428b9221eccdedeeae2736c8496c03113f90633135d8",
+        "timestamp": 1532511655997,
+        "chainId": 1,
+        "chainName": "test-chain",
+        "errorMessage": "Not enough base gas."
+      }
+    ]
+  }
 }
 ```
 
@@ -179,22 +179,22 @@ example
 
 ```ruby
 {
-    "result": {
-        "transaction": {
-            "value": "0x0000000000000000000000000000000000000000000000000000000000000000", # 0 if valueFormat=decimal
-            "to": "0xffffffffffffffffffffffffffffffffff010001",
-            "gasUsed": "0x45754",
-            "quotaUsed": "0x45754",
-            "from": "0x35f8ca15fdeb958d9ad60537bec5e35444dd6d93",
-            "content": "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",
-            "blockNumber": "0xffff",
-            "hash": "0xf005a3585f9cfce03c7e428b9221eccdedeeae2736c8496c03113f90633135d8",
-            "timestamp": 1532511655997,
-            "chainId": 1,
-            "chainName": "test-chain",
-            "errorMessage": "Not enough base gas."
-        }
+  "result": {
+    "transaction": {
+      "value": "0x0000000000000000000000000000000000000000000000000000000000000000", # 0 if valueFormat=decimal
+      "to": "0xffffffffffffffffffffffffffffffffff010001",
+      "gasUsed": "0x45754",
+      "quotaUsed": "0x45754",
+      "from": "0x35f8ca15fdeb958d9ad60537bec5e35444dd6d93",
+      "content": "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",
+      "blockNumber": "0xffff",
+      "hash": "0xf005a3585f9cfce03c7e428b9221eccdedeeae2736c8496c03113f90633135d8",
+      "timestamp": 1532511655997,
+      "chainId": 1,
+      "chainName": "test-chain",
+      "errorMessage": "Not enough base gas."
     }
+  }
 }
 
 # or not found
@@ -224,37 +224,37 @@ Get proposals info or brief info.
 ```ruby
 # when type = "proposals"
 {
-    "result": [
-        {
-            "validator": "0x0000000000000000000000000000000000000000", # proposer of block header
-            "count": 1 # count of this proposer
-        },
-        {
-            "validator": "0x31042d4f7662cddf8ded5229db3c5e7302875e10",
-            "count": 28514
-        },
-        {
-            "validator": "0x486bb688c8d29056bd7f87c26733048b0a6abda6",
-            "count": 27044
-        },
-        {
-            "validator": "0x71b028e49c6f41aaa74932d703c707ecca6d732e",
-            "count": 27844
-        },
-        {
-            "validator": "0xee01b9ba97671e8a1891e85b206b499f106822a1",
-            "count": 27797
-        }
-    ]
+  "result": [
+    {
+      "validator": "0x0000000000000000000000000000000000000000", # proposer of block header
+      "count": 1 # count of this proposer
+    },
+    {
+      "validator": "0x31042d4f7662cddf8ded5229db3c5e7302875e10",
+      "count": 28514
+    },
+    {
+      "validator": "0x486bb688c8d29056bd7f87c26733048b0a6abda6",
+      "count": 27044
+    },
+    {
+      "validator": "0x71b028e49c6f41aaa74932d703c707ecca6d732e",
+      "count": 27844
+    },
+    {
+      "validator": "0xee01b9ba97671e8a1891e85b206b499f106822a1",
+      "count": 27797
+    }
+  ]
 }
 
 # when type = "brief"
 {
-    "result": {
-        "tps": 0, # float number, transaction count per second
-        "tpb": 0, # float number, transaction count per block
-        "ipb": 2.97 # float number, average block interval
-    }
+  "result": {
+    "tps": 0, # float number, transaction count per second
+    "tpb": 0, # float number, transaction count per block
+    "ipb": 2.97 # float number, average block interval
+  }
 }
 ```
 
@@ -268,11 +268,11 @@ Get sync process running status.
 
 ```ruby
 {
-    "result": {
-        "status": "not running", # sync process running status, "not running" or "running"
-        "currentBlockNumber": "0x1b25f", # last sync block
-        "currentChainBlockNumber": "0x717d0" # the chain current block number
-    }
+  "result": {
+    "status": "not running", # sync process running status, "not running" or "running"
+    "currentBlockNumber": "0x1b25f", # last sync block
+    "currentChainBlockNumber": "0x717d0" # the chain current block number
+  }
 }
 ```
 
@@ -298,20 +298,20 @@ Get sync errors list, which is the errors while sync from chain.
 
 ```ruby
 {
-    "result": {
-        "count": 4, # total count of sync errors
-        "syncErrors": [
-            {
-                "params": ["0x123"], # the params you send
-                "code": -32700,
-                "message": "invalid format: [0x123]",
-                "createdAt": "2018-08-07T03:21:15.862Z",
-                "updatedAt": "2018-08-07T03:21:15.862Z",
-                "data": null,
-                "method": "getTransaction" # the method you access
-            }
-        ]
-    }
+  "result": {
+    "count": 4, # total count of sync errors
+    "syncErrors": [
+      {
+        "params": ["0x123"], # the params you send
+        "code": -32700,
+        "message": "invalid format: [0x123]",
+        "createdAt": "2018-08-07T03:21:15.862Z",
+        "updatedAt": "2018-08-07T03:21:15.862Z",
+        "data": null,
+        "method": "getTransaction" # the method you access
+      }
+    ]
+  }
 }
 ```
 
@@ -325,16 +325,16 @@ Get erc20 contracts transfer event logs by address
 
 ```ruby
 {
-    "address": "0x...", # contract address, required
-    "account": "from or to", # hash
-    "from": "from address", # hash
-    "to": "to address", # hash
-    "page": 1, # default 1
-    "perPage": 10, # default 10
-    
-    # offset and limit has lower priority than page and perPage
-    "offset": 1, # default 0
-    "limit": 10 # default 10
+  "address": "0x...", # contract address, required
+  "account": "from or to", # hash
+  "from": "from address", # hash
+  "to": "to address", # hash
+  "page": 1, # default 1
+  "perPage": 10, # default 10
+  
+  # offset and limit has lower priority than page and perPage
+  "offset": 1, # default 0
+  "limit": 10 # default 10
 }
 ```
 
@@ -342,23 +342,23 @@ Get erc20 contracts transfer event logs by address
 
 ```ruby
 {
-    "result": {
-        "count": 1,
-        "transfers": [
-            {
-                "address": "0x0b9a7bad10e78aefbe6d99e61c7ea2a23c3ec888",
-                "from": "0xac30bce77cf849d869aa37e39b983fa50767a2dd",
-                "to": "0x6005ed6b942c99533b896b95fe8a90c7a7ecbf6a",
-                "value": 10,
-                "blockNumber": "0x18a1ec",
-                "gasUsed": "0x64",
-                "quotaUsed": "0x64",
-                "hash": "0x14b06be4067ba65d05e41d8821e2cf7d572a65b1bf53857a6a504ec42e69fdfd",
-                "chainId": 1,
-                "chainName": "test-chain"
-            }
-        ]
-    }
+  "result": {
+    "count": 1,
+    "transfers": [
+      {
+        "address": "0x0b9a7bad10e78aefbe6d99e61c7ea2a23c3ec888",
+        "from": "0xac30bce77cf849d869aa37e39b983fa50767a2dd",
+        "to": "0x6005ed6b942c99533b896b95fe8a90c7a7ecbf6a",
+        "value": 10,
+        "blockNumber": "0x18a1ec",
+        "gasUsed": "0x64",
+        "quotaUsed": "0x64",
+        "hash": "0x14b06be4067ba65d05e41d8821e2cf7d572a65b1bf53857a6a504ec42e69fdfd",
+        "chainId": 1,
+        "chainName": "test-chain"
+      }
+    ]
+  }
 }
 ```
 
@@ -372,8 +372,8 @@ Get event logs by address
 
 ```ruby
 {
-    "page": 1, # default 1
-    "perPage": 10, # default 10
+  "page": 1, # default 1
+  "perPage": 10, # default 10
 }
 ```
 
@@ -403,4 +403,3 @@ Get event logs by address
   }
 }
 ```
-)