addr: handle P2SH/P2PKH in scriptpubkey encoding

Previously, returned null if a scriptpubkey was not Segwit; now
handles encoding to Base58 for other types.

common/addr.c

@@ -1,21 +1,27 @@
 #include "addr.h"
+#include <bitcoin/address.h>
+#include <bitcoin/base58.h>
 #include <bitcoin/script.h>
 #include <common/bech32.h>
 
-/* Returns NULL if the script is not a P2WPKH or P2WSH */
 char *encode_scriptpubkey_to_addr(const tal_t *ctx,
-				   const char *hrp,
-				   const u8 *scriptPubkey)
+				  const struct chainparams *chainparams,
+				  const u8 *scriptPubkey)
 {
 	char *out;
 	size_t scriptLen = tal_bytelen(scriptPubkey);
+	struct bitcoin_address pkh;
+	struct ripemd160 sh;
 
-        /* Check that scriptPubkey is P2WSH or P2WPKH */
-	if (!is_p2wsh(scriptPubkey, NULL) && !is_p2wpkh(scriptPubkey, NULL))
-                return NULL;
+	if (is_p2pkh(scriptPubkey, &pkh))
+		return bitcoin_to_base58(ctx, chainparams, &pkh);
 
-	out = tal_arr(ctx, char, 73 + strlen(hrp));
-	if (!segwit_addr_encode(out, hrp, 0, scriptPubkey + 2, scriptLen - 2))
+	if (is_p2sh(scriptPubkey, &sh))
+		return p2sh_to_base58(ctx, chainparams, &sh);
+
+	out = tal_arr(ctx, char, 73 + strlen(chainparams->bip173_name));
+	if (!segwit_addr_encode(out, chainparams->bip173_name, 0,
+				scriptPubkey + 2, scriptLen - 2))
 		return tal_free(out);
 
 	return out;

common/addr.h

@@ -1,12 +1,13 @@
 #ifndef LIGHTNING_COMMON_ADDR_H
 #define LIGHTNING_COMMON_ADDR_H
 #include "config.h"
+#include <bitcoin/chainparams.h>
 #include <ccan/short_types/short_types.h>
 #include <ccan/tal/tal.h>
 
-/* Given a P2WSH or P2WPKH scriptPubkey, return a bech32 encoded address */
+/* Given a scriptPubkey, return an encoded address */
 char *encode_scriptpubkey_to_addr(const tal_t *ctx,
-                                  const char *hrp,
+				  const struct chainparams *chainparams,
                                   const u8 *scriptPubkey);
 
 #endif /* LIGHTNING_COMMON_ADDR_H */

lightningd/opening_control.c

@@ -301,7 +301,7 @@ static void funding_started_success(struct funding_channel *fc,
 
 	response = json_stream_success(cmd);
 	out = encode_scriptpubkey_to_addr(cmd,
-				          get_chainparams(cmd->ld)->bip173_name,
+				          get_chainparams(cmd->ld),
 					  scriptPubkey);
 	if (out) {
 		json_add_string(response, "funding_address", out);

lightningd/test/run-invoice-select-inchan.c

@@ -82,6 +82,11 @@ void connect_succeeded(struct lightningd *ld UNNEEDED, const struct node_id *id
 void delay_then_reconnect(struct channel *channel UNNEEDED, u32 seconds_delay UNNEEDED,
 			  const struct wireaddr_internal *addrhint TAKES UNNEEDED)
 { fprintf(stderr, "delay_then_reconnect called!\n"); abort(); }
+/* Generated stub for encode_scriptpubkey_to_addr */
+char *encode_scriptpubkey_to_addr(const tal_t *ctx UNNEEDED,
+				  const struct chainparams *chainparams UNNEEDED,
+                                  const u8 *scriptPubkey UNNEEDED)
+{ fprintf(stderr, "encode_scriptpubkey_to_addr called!\n"); abort(); }
 /* Generated stub for fail_htlc */
 void fail_htlc(struct htlc_in *hin UNNEEDED, enum onion_type failcode UNNEEDED)
 { fprintf(stderr, "fail_htlc called!\n"); abort(); }

plugins/Makefile

@@ -12,6 +12,7 @@ PLUGIN_LIB_HEADER := plugins/libplugin.h
 PLUGIN_LIB_OBJS := $(PLUGIN_LIB_SRC:.c=.o)
 
 PLUGIN_COMMON_OBJS :=				\
+	bitcoin/base58.o			\
 	bitcoin/pubkey.o			\
 	bitcoin/pullpush.o			\
 	bitcoin/script.o			\

plugins/fundchannel.c

@@ -470,8 +470,7 @@ static void init(struct plugin_conn *rpc,
 						   "network")),
 			         rpc, ".network");
 	chainparams = chainparams_for_network(network_name);
-	placeholder_funding_addr = encode_scriptpubkey_to_addr(NULL,
-							       chainparams->bip173_name,
+	placeholder_funding_addr = encode_scriptpubkey_to_addr(NULL, chainparams,
 							       placeholder);
 }
 

wallet/test/run-wallet.c

@@ -90,6 +90,11 @@ void connect_succeeded(struct lightningd *ld UNNEEDED, const struct node_id *id
 void delay_then_reconnect(struct channel *channel UNNEEDED, u32 seconds_delay UNNEEDED,
 			  const struct wireaddr_internal *addrhint TAKES UNNEEDED)
 { fprintf(stderr, "delay_then_reconnect called!\n"); abort(); }
+/* Generated stub for encode_scriptpubkey_to_addr */
+char *encode_scriptpubkey_to_addr(const tal_t *ctx UNNEEDED,
+				  const struct chainparams *chainparams UNNEEDED,
+                                  const u8 *scriptPubkey UNNEEDED)
+{ fprintf(stderr, "encode_scriptpubkey_to_addr called!\n"); abort(); }
 /* Generated stub for fatal */
 void   fatal(const char *fmt UNNEEDED, ...)
 { fprintf(stderr, "fatal called!\n"); abort(); }

wallet/walletrpc.c

@@ -814,7 +814,7 @@ static struct command_result *json_listfunds(struct command *cmd,
 		        json_add_string(response, "address", out);
 		} else if (utxos[i]->scriptPubkey != NULL) {
 			out = encode_scriptpubkey_to_addr(
-			    cmd, get_chainparams(cmd->ld)->bip173_name,
+			    cmd, get_chainparams(cmd->ld),
 			    utxos[i]->scriptPubkey);
 			if (out)
 				json_add_string(response, "address", out);