From e11987f0c2f63086da7ea99211361bca8c911623 Mon Sep 17 00:00:00 2001
From: Delweng Zheng <zwb@caicloud.io>
Date: Wed, 6 Jun 2018 21:57:53 +0800
Subject: [PATCH] core/rawdb: wrappered helper to assemble key

---
 core/rawdb/schema.go | 55 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/core/rawdb/schema.go b/core/rawdb/schema.go
index a4b1596fde..e767cef237 100644
--- a/core/rawdb/schema.go
+++ b/core/rawdb/schema.go
@@ -77,3 +77,58 @@ func encodeBlockNumber(number uint64) []byte {
 	binary.BigEndian.PutUint64(enc, number)
 	return enc
 }
+
+// headerKey = headerPrefix + num (uint64 big endian) + hash
+func headerKey(number uint64, suffix []byte) []byte {
+	return append(append(headerPrefix, encodeBlockNumber(number)...), suffix...)
+}
+
+// headerTDKey = headerPrefix + num (uint64 big endian) + hash + headerTDSuffix
+func headerTDKey(number uint64, hashBytes []byte) []byte {
+	return append(headerKey(number, hashBytes), headerTDSuffix...)
+}
+
+// headerHashKey = headerPrefix + num (uint64 big endian) + headerHashSuffix
+func headerHashKey(number uint64) []byte {
+	return headerKey(number, headerHashSuffix)
+}
+
+// headerNumberKey = headerNumberPrefix + hash
+func headerNumberKey(hashBytes []byte) []byte {
+	return append(headerNumberPrefix, hashBytes...)
+}
+
+// blockBodyKey = blockBodyPrefix + num (uint64 big endian) + hash
+func blockBodyKey(number uint64, hashBytes []byte) []byte {
+	return append(append(blockBodyPrefix, encodeBlockNumber(number)...), hashBytes...)
+}
+
+// blockReceiptsKey = blockReceiptsPrefix + num (uint64 big endian) + hash
+func blockReceiptsKey(number uint64, hashBytes []byte) []byte {
+	return append(append(blockReceiptsPrefix, encodeBlockNumber(number)...), hashBytes...)
+}
+
+// txLookupKey = txLookupPrefix + hash
+func txLookupKey(hashBytes []byte) []byte {
+	return append(txLookupPrefix, hashBytes...)
+}
+
+// bloomBitsKey = bloomBitsPrefix + bit (uint16 big endian) + section (uint64 big endian) + hash
+func bloomBitsKey(bit uint, section uint64, hashBytes []byte) []byte {
+	key := append(append(bloomBitsPrefix, make([]byte, 10)...), hashBytes...)
+
+	binary.BigEndian.PutUint16(key[1:], uint16(bit))
+	binary.BigEndian.PutUint64(key[3:], section)
+
+	return key
+}
+
+// preimageKey = preimagePrefix + hash
+func preimageKey(hashBytes []byte) []byte {
+	return append(preimagePrefix, hashBytes...)
+}
+
+// configKey = configPrefix + hash
+func configKey(hashBytes []byte) []byte {
+	return append(configPrefix, hashBytes...)
+}