Added bloom filter & block filter methods

ethchain/bloom_test.go

@@ -0,0 +1,20 @@
+package ethchain
+
+import "testing"
+
+func TestBloomFilter(t *testing.T) {
+	bf := NewBloomFilter(nil)
+
+	a := []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0}
+	bf.Set(a)
+
+	b := []byte{10, 11, 12, 13, 14, 15, 16, 17, 18, 19}
+
+	if bf.Search(a) == false {
+		t.Error("Expected 'a' to yield true using a bloom filter")
+	}
+
+	if bf.Search(b) {
+		t.Error("Expected 'b' not to field trie using a bloom filter")
+	}
+}