From c9920809a0a22aec86f636847181a75e6c75e568 Mon Sep 17 00:00:00 2001
From: Ben Chan <benchan@bitgo.com>
Date: Tue, 14 Jun 2016 13:26:49 -0700
Subject: [PATCH] methods to get pending transactions

---
 wallet/wallet.sol | 64 ++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 60 insertions(+), 4 deletions(-)

diff --git a/wallet/wallet.sol b/wallet/wallet.sol
index c522a9b..15d5780 100644
--- a/wallet/wallet.sol
+++ b/wallet/wallet.sol
@@ -138,9 +138,13 @@ contract multiowned {
         uint ownerIndexBit = 2**ownerIndex;
         return !(pending.ownersDone & ownerIndexBit == 0);
     }
-    
-    // INTERNAL METHODS
 
+    // Given an operation hash, get the number of confirmations needed
+    function getPendingConfirmationsNeeded(bytes32 _operation) returns (uint) {
+        return m_pending[_operation].yetNeeded;
+    }
+
+    // INTERNAL METHODS
     function confirmAndCheck(bytes32 _operation) internal returns (bool) {
         // determine what index the present sender is:
         uint ownerIndex = m_ownerIndex[uint(msg.sender)];
@@ -363,9 +367,53 @@ contract Wallet is multisig, multiowned, daylimit {
             return true;
         }
     }
-    
+
+    // Gets the number of pending transactions
+    function numPendingTransactions() returns (uint) {
+        var pendingTransactionsCount = 0;
+        // Use m_pendingIndex.length to get all hashes, then count how many of the
+        // operations are transactions, because we don't want to store hashes twice
+        // and this is a local call anyway
+        for (uint i = 0; i < m_pendingIndex.length; i++) {
+            if (isPendingTransaction(i)) {
+              pendingTransactionsCount++;
+            }
+        }
+
+        return pendingTransactionsCount;
+    }
+
+    // Gets the hash of a pending operation at the specified index
+    function getPendingTransaction(uint _index) returns (bytes32) {
+        var pendingTransactionsCount = 0;
+        // Seek through all of m_pendingIndex (used in the multiowned contract)
+        // But only count transactions
+        for (uint i = 0; i < m_pendingIndex.length; i++) {
+            if (isPendingTransaction(i)) {
+                if (_index == pendingTransactionsCount) {
+                    return m_pendingIndex[i];
+                }
+                pendingTransactionsCount++;
+            }
+        }
+    }
+
+    // Gets the destination address of a pending transaction by the operation hash
+    function getPendingTransactionToAddress(bytes32 _operation) returns (address) {
+        return address(m_txs[_operation].to);
+    }
+
+    // Gets the value in wei of a pending transaction by the operation hash
+    function getPendingTransactionValue(bytes32 _operation) returns (uint) {
+        return m_txs[_operation].value;
+    }
+
+    // Gets the proposed data of a pending transaction by the operation hash
+    function getPendingTransactionData(bytes32 _operation) returns (bytes) {
+        return m_txs[_operation].data;
+    }
+
     // INTERNAL METHODS
-    
     function clearPending() internal {
         uint length = m_pendingIndex.length;
         for (uint i = 0; i < length; ++i)
@@ -373,6 +421,14 @@ contract Wallet is multisig, multiowned, daylimit {
         super.clearPending();
     }
 
+    // Determine if a pending operation index is a pending transaction
+    function isPendingTransaction(uint _index) internal returns (bool) {
+        if (m_txs[m_pendingIndex[_index]].to != 0 || m_txs[m_pendingIndex[_index]].data.length != 0) {
+            return true;
+        }
+        return false;
+    }
+
 	// FIELDS
 
     // pending transactions we have at present.