extract xprv_fill_public method

bip32.c

@@ -14,8 +14,7 @@ void xprv_from_seed(uint8_t *seed, int seed_len, XprvNode *out)
 	// this can be done because private_key[32] and chain_code[32]
 	// form a continuous 64 byte block in the memory
 	hmac_sha512((uint8_t *)"Bitcoin seed", 12, seed, seed_len, out->private_key);
-	ecdsa_get_public_key33(out->private_key, out->public_key);
-	ecdsa_get_address(out->public_key, 0, out->address);
+	xprv_fill_public(out);
 }
 
 void xprv_descent(XprvNode *inout, uint32_t i)
@@ -44,6 +43,12 @@ void xprv_descent(XprvNode *inout, uint32_t i)
 	inout->child_num = i;
 	bn_write_be(&a, inout->private_key);
 
-	ecdsa_get_public_key33(inout->private_key, inout->public_key);
-	ecdsa_get_address(inout->public_key, 0, inout->address);
+	xprv_fill_public(inout);
+}
+
+void xprv_fill_public(XprvNode *xprv)
+{
+	const uint8_t version = 0x00;
+	ecdsa_get_public_key33(xprv->private_key, xprv->public_key);
+	ecdsa_get_address(xprv->public_key, version, xprv->address);
 }

bip32.h

@@ -20,4 +20,6 @@ void xprv_from_seed(uint8_t *seed, int seed_len, XprvNode *out);
 
 void xprv_descent(XprvNode *inout, uint32_t i);
 
+void xprv_fill_public(XprvNode *xprv);
+
 #endif

ecdsa.c

@@ -293,7 +293,7 @@ void ecdsa_get_public_key65(const uint8_t *priv_key, uint8_t *pub_key)
 	bn_write_be(&R.y, pub_key + 33);
 }
 
-void ecdsa_get_address(const uint8_t *pub_key, char version, char *addr)
+void ecdsa_get_address(const uint8_t *pub_key, uint8_t version, char *addr)
 {
 	const char code[] = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
 	char *p = addr, s;

ecdsa.h

@@ -35,7 +35,7 @@
 int ecdsa_sign(const uint8_t *priv_key, const uint8_t *msg, uint32_t msg_len, uint8_t *sig);
 void ecdsa_get_public_key33(const uint8_t *priv_key, uint8_t *pub_key);
 void ecdsa_get_public_key65(const uint8_t *priv_key, uint8_t *pub_key);
-void ecdsa_get_address(const uint8_t *pub_key, char version, char *addr);
+void ecdsa_get_address(const uint8_t *pub_key, uint8_t version, char *addr);
 int ecdsa_verify(const uint8_t *pub_key, const uint8_t *sig, const uint8_t *msg, uint32_t msg_len);
 
 #endif