diff --git a/README.md b/README.md
index 12d0541..3c5e146 100644
--- a/README.md
+++ b/README.md
@@ -56,7 +56,7 @@ The entire spec is contained in the [schema.json](src/schema.json) file.
 
   ```
   methods: {
-    <method name : [ input(s), output(s), minimum required outputs, 'latest' tag default position (if any) ] >,
+    <method name : [ Array Input(s), Array Output(s), String Output type, Integer Minimum required parameters, Boolean Requires default block parameter] >,
   }
   ```
 
@@ -65,7 +65,7 @@ The entire spec is contained in the [schema.json](src/schema.json) file.
   ```
   {
     methods: {
-      "eth_getBalance": [["D20", "Q|T"], "Q", 1, 2],
+      "eth_getBalance": [["D20", "Q|T"], "Q", 1, true],
       ...
     },
     ...
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..fe75f93
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,15 @@
+{
+  "name": "digitaldonkey/ethjs-schema",
+  "description": "Schema file for Ethereum JSON RPC API. See: https://github.com/ethereum/wiki/wiki/JSON-RPC",
+  "license": "MIT",
+  "authors": [
+    {
+      "name": "Nick Dodson",
+      "email": "nick.dodson@consensys.net"
+    },
+    {
+      "name": "Thorsten Krug",
+      "email": "thorsten.krug@consensys.net"
+    }
+  ]
+}
diff --git a/src/schema.json b/src/schema.json
index 5f19df7..3e21b3a 100644
--- a/src/schema.json
+++ b/src/schema.json
@@ -2,9 +2,12 @@
   "methods": {
     "web3_clientVersion": [[], "S"],
     "web3_sha3": [["S"], "D", 1],
+    "ecrecover": [["D32","Q","D32","D32"], "D20", 4],
     "net_version": [[], "S"],
     "net_peerCount": [[], "Q"],
     "net_listening": [[], "B"],
+    "personal_sign": [["D20", "D", "S"], "D", 2],
+    "personal_ecRecover": [["D", "D"], "D20", 2],
     "eth_protocolVersion": [[], "S"],
     "eth_syncing": [[], "Boolean|EthSyncing"],
     "eth_coinbase": [[], "D20"],
@@ -13,18 +16,18 @@
     "eth_gasPrice": [[], "Q"],
     "eth_accounts": [[], ["D20"]],
     "eth_blockNumber": [[], "Q"],
-    "eth_getBalance": [["D20", "Q|T"], "Q", 1, 2],
-    "eth_getStorageAt": [["D20", "Q", "Q|T"], "D", 2, 2],
-    "eth_getTransactionCount": [["D20", "Q|T"], "Q", 1, 2],
+    "eth_getBalance": [["D20", "Q|T"], "Q", 1, true],
+    "eth_getStorageAt": [["D20", "Q", "Q|T"], "D", 2, true],
+    "eth_getTransactionCount": [["D20", "Q|T"], "Q", 1, true],
     "eth_getBlockTransactionCountByHash": [["D32"], "Q", 1],
     "eth_getBlockTransactionCountByNumber": [["Q|T"], "Q", 1],
     "eth_getUncleCountByBlockHash": [["D32"], "Q", 1],
     "eth_getUncleCountByBlockNumber": [["Q"], "Q", 1],
-    "eth_getCode": [["D20", "Q|T"], "D", 1, 2],
+    "eth_getCode": [["D20", "Q|T"], "D", 1, true],
     "eth_sign": [["D20", "D32"], "D", 2],
     "eth_sendTransaction": [["SendTransaction"], "D", 1],
     "eth_sendRawTransaction": [["D"], "D32", 1],
-    "eth_call": [["CallTransaction", "Q|T"], "D", 1, 2],
+    "eth_call": [["CallTransaction", "Q|T"], "D", 1, true],
     "eth_estimateGas": [["EstimateTransaction", "Q|T"], "Q", 1],
     "eth_getBlockByHash": [["D32", "B"], "Block", 2],
     "eth_getBlockByNumber": [["Q|T", "B"], "Block", 2],
@@ -152,7 +155,7 @@
       "__required": [],
       "fromBlock": "Q|T",
       "toBlock": "Q|T",
-      "address": "Array|Data",
+      "address": "Array|DATA",
       "topics": ["D"]
     },
     "FilterChange": {