diff --git a/include/libeosio/WIF.hpp b/include/libeosio/WIF.hpp
index 767da80..2978c88 100644
--- a/include/libeosio/WIF.hpp
+++ b/include/libeosio/WIF.hpp
@@ -38,6 +38,23 @@ extern const std::string WIF_PVT_LEG;
 extern const std::string WIF_PVT_K1;
 extern const std::string WIF_SIG_K1;
 
+/**
+ * Codecs
+ */
+
+// A WIF Codec is an public and private key prefix pair.
+typedef struct {
+	std::string pub;
+	std::string pvt;
+} wif_codec_t;
+
+extern const wif_codec_t WIF_CODEC_K1;
+extern const wif_codec_t WIF_CODEC_LEG;
+
+inline wif_codec_t wif_create_legacy_codec(const std::string& pub_prefix) {
+	return { pub_prefix, WIF_PVT_LEG };
+}
+
 /**
  * Encode an EC private key to WIF String.
  */
diff --git a/src/WIF.cpp b/src/WIF.cpp
index 9d8712d..7de1c6b 100644
--- a/src/WIF.cpp
+++ b/src/WIF.cpp
@@ -36,6 +36,9 @@ const std::string WIF_PVT_LEG = "";
 const std::string WIF_PVT_K1  = "PVT_K1_";
 const std::string WIF_SIG_K1  = "SIG_K1_";
 
+const wif_codec_t WIF_CODEC_K1  = { WIF_PUB_K1, WIF_PVT_K1 };
+const wif_codec_t WIF_CODEC_LEG = wif_create_legacy_codec(WIF_PUB_LEG);
+
 std::string wif_priv_encode(const ec_privkey_t& priv, const std::string& prefix) {
 
 	checksum_t check;