fixed verification of signatures signed with eth_sign, closes #17

contracts/Authorities.bin

@@ -1 +1 @@
-60606040523415600e57600080fd5b5b603680601c6000396000f30060606040525b600080fd00a165627a7a7230582055040070eecda16f7992555f728eac18e0652f23cefba6637af8a8384e1c5de90029
+60606040523415600e57600080fd5b5b603680601c6000396000f30060606040525b600080fd00a165627a7a723058209ccf54929d065bb2c6b737f40dbe925c7268d38fa91d71817ee6528f47dfb2dd0029

contracts/EthereumBridge.abi

@@ -22,6 +22,7 @@
         "name": "withdraw",
         "outputs": [],
         "payable": false,
+        "stateMutability": "nonpayable",
         "type": "function"
     },
     {
@@ -47,6 +48,7 @@
         "name": "reelect",
         "outputs": [],
         "payable": false,
+        "stateMutability": "nonpayable",
         "type": "function"
     },
     {
@@ -61,10 +63,12 @@
             }
         ],
         "payable": false,
+        "stateMutability": "nonpayable",
         "type": "constructor"
     },
     {
         "payable": true,
+        "stateMutability": "payable",
         "type": "fallback"
     },
     {

contracts/KovanBridge.abi

@@ -19,6 +19,7 @@
             }
         ],
         "payable": false,
+        "stateMutability": "view",
         "type": "function"
     },
     {
@@ -40,6 +41,7 @@
         "name": "deposit",
         "outputs": [],
         "payable": false,
+        "stateMutability": "nonpayable",
         "type": "function"
     },
     {
@@ -58,6 +60,7 @@
             }
         ],
         "payable": false,
+        "stateMutability": "view",
         "type": "function"
     },
     {
@@ -75,6 +78,7 @@
         "name": "submitSignature",
         "outputs": [],
         "payable": false,
+        "stateMutability": "nonpayable",
         "type": "function"
     },
     {
@@ -96,6 +100,7 @@
         "name": "transfer",
         "outputs": [],
         "payable": false,
+        "stateMutability": "nonpayable",
         "type": "function"
     },
     {
@@ -110,6 +115,7 @@
             }
         ],
         "payable": false,
+        "stateMutability": "nonpayable",
         "type": "constructor"
     },
     {

contracts/bridge.sol

@@ -1,4 +1,4 @@
-pragma solidity ^0.4.15;
+pragma solidity ^0.4.16;
 
 library Authorities {
     function contains (address[] self, address value) internal returns (bool) {
@@ -40,7 +40,8 @@ contract EthereumBridge {
 
     /// Multisig authority validation
     modifier allAuthorities (uint8[] v, bytes32[] r, bytes32[] s, bytes message) {
-        var hash = sha3(message);
+        bytes memory prefix = "\x19Ethereum Signed Message:\n";
+        var hash = sha3(prefix, message.length, message);
         var used = new address[](requiredSignatures);
 
         require(requiredSignatures <= v.length);