From 0f84b9c30d06a59f20a2d33ffd1281d5e6e2681a Mon Sep 17 00:00:00 2001
From: obscuren <geffobscura@gmail.com>
Date: Mon, 4 Aug 2014 16:34:55 +0200
Subject: [PATCH] Added exist method

---
 ethpipe/pipe.go      | 4 ++++
 ethpipe/pipe_test.go | 1 +
 2 files changed, 5 insertions(+)

diff --git a/ethpipe/pipe.go b/ethpipe/pipe.go
index 710fc4e7c..ca0a3416c 100644
--- a/ethpipe/pipe.go
+++ b/ethpipe/pipe.go
@@ -75,6 +75,10 @@ func (self *Pipe) ToAddress(priv []byte) []byte {
 	return pair.Address()
 }
 
+func (self *Pipe) Exists(addr []byte) bool {
+	return self.World().Get(addr) != nil
+}
+
 func (self *Pipe) TransactString(key *ethcrypto.KeyPair, rec string, value, gas, price *ethutil.Value, data []byte) error {
 	// Check if an address is stored by this address
 	var hash []byte
diff --git a/ethpipe/pipe_test.go b/ethpipe/pipe_test.go
index d0b8ef948..071213050 100644
--- a/ethpipe/pipe_test.go
+++ b/ethpipe/pipe_test.go
@@ -34,6 +34,7 @@ func TestNew(t *testing.T) {
 	pipe.Block(addr)
 	pipe.Storage(addr, addr)
 	pipe.ToAddress(privy)
+	pipe.Exists(addr)
 	// Doesn't change state
 	pipe.Execute(addr, nil, Val(0), Val(1000000), Val(10))
 	// Doesn't change state