diff --git a/common/Makefile b/common/Makefile
index 7bd094b30..a8a682210 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -26,6 +26,7 @@ COMMON_SRC_NOGEN :=				\
 	common/io_lock.c			\
 	common/json.c				\
 	common/json_escaped.c			\
+	common/json_helpers.c			\
 	common/json_tok.c			\
 	common/key_derive.c			\
 	common/keyset.c				\
diff --git a/common/json.c b/common/json.c
index 0e9d0f3c2..678f1b5de 100644
--- a/common/json.c
+++ b/common/json.c
@@ -1,6 +1,7 @@
 /* JSON core and helpers */
 #include "json.h"
 #include <assert.h>
+#include <bitcoin/pubkey.h>
 #include <ccan/build_assert/build_assert.h>
 #include <ccan/mem/mem.h>
 #include <ccan/str/hex/hex.h>
@@ -127,34 +128,6 @@ bool json_to_bool(const char *buffer, const jsmntok_t *tok, bool *b)
 	return false;
 }
 
-bool json_to_bitcoin_amount(const char *buffer, const jsmntok_t *tok,
-			    uint64_t *satoshi)
-{
-	char *end;
-	unsigned long btc, sat;
-
-	btc = strtoul(buffer + tok->start, &end, 10);
-	if (btc == ULONG_MAX && errno == ERANGE)
-		return false;
-	if (end != buffer + tok->end) {
-		/* Expect always 8 decimal places. */
-		if (*end != '.' || buffer + tok->end - end != 9)
-			return false;
-		sat = strtoul(end+1, &end, 10);
-		if (sat == ULONG_MAX && errno == ERANGE)
-			return false;
-		if (end != buffer + tok->end)
-			return false;
-	} else
-		sat = 0;
-
-	*satoshi = btc * (uint64_t)100000000 + sat;
-	if (*satoshi != btc * (uint64_t)100000000 + sat)
-		return false;
-
-	return true;
-}
-
 bool json_tok_is_num(const char *buffer, const jsmntok_t *tok)
 {
 	if (tok->type != JSMN_PRIMITIVE)
diff --git a/common/json.h b/common/json.h
index 954eebf72..d0e5f985b 100644
--- a/common/json.h
+++ b/common/json.h
@@ -1,8 +1,6 @@
 #ifndef LIGHTNING_COMMON_JSON_H
 #define LIGHTNING_COMMON_JSON_H
 #include "config.h"
-#include <bitcoin/pubkey.h>
-#include <ccan/take/take.h>
 #include <ccan/tal/tal.h>
 #include <stdbool.h>
 #include <stdint.h>
@@ -11,9 +9,6 @@
 #define JSMN_STRICT 1
 # include <external/jsmn/jsmn.h>
 
-struct json_escaped;
-struct short_channel_id;
-
 /* Include " if it's a string. */
 const char *json_tok_full(const char *buffer, const jsmntok_t *t);
 
@@ -43,10 +38,6 @@ bool json_to_int(const char *buffer, const jsmntok_t *tok, int *num);
 /* Extract boolean from this */
 bool json_to_bool(const char *buffer, const jsmntok_t *tok, bool *b);
 
-/* Extract satoshis from this (may be a string, or a decimal number literal) */
-bool json_to_bitcoin_amount(const char *buffer, const jsmntok_t *tok,
-			    uint64_t *satoshi);
-
 /* Is this a number? [0..9]+ */
 bool json_tok_is_num(const char *buffer, const jsmntok_t *tok);
 
diff --git a/common/json_helpers.c b/common/json_helpers.c
new file mode 100644
index 000000000..42ace5b15
--- /dev/null
+++ b/common/json_helpers.c
@@ -0,0 +1,46 @@
+#include <bitcoin/pubkey.h>
+#include <bitcoin/short_channel_id.h>
+#include <common/json_helpers.h>
+#include <errno.h>
+
+bool json_to_bitcoin_amount(const char *buffer, const jsmntok_t *tok,
+			    uint64_t *satoshi)
+{
+	char *end;
+	unsigned long btc, sat;
+
+	btc = strtoul(buffer + tok->start, &end, 10);
+	if (btc == ULONG_MAX && errno == ERANGE)
+		return false;
+	if (end != buffer + tok->end) {
+		/* Expect always 8 decimal places. */
+		if (*end != '.' || buffer + tok->end - end != 9)
+			return false;
+		sat = strtoul(end+1, &end, 10);
+		if (sat == ULONG_MAX && errno == ERANGE)
+			return false;
+		if (end != buffer + tok->end)
+			return false;
+	} else
+		sat = 0;
+
+	*satoshi = btc * (uint64_t)100000000 + sat;
+	if (*satoshi != btc * (uint64_t)100000000 + sat)
+		return false;
+
+	return true;
+}
+
+bool json_to_pubkey(const char *buffer, const jsmntok_t *tok,
+		    struct pubkey *pubkey)
+{
+	return pubkey_from_hexstr(buffer + tok->start,
+				  tok->end - tok->start, pubkey);
+}
+
+bool json_to_short_channel_id(const char *buffer, const jsmntok_t *tok,
+			      struct short_channel_id *scid)
+{
+	return (short_channel_id_from_str(buffer + tok->start,
+					  tok->end - tok->start, scid));
+}
diff --git a/common/json_helpers.h b/common/json_helpers.h
new file mode 100644
index 000000000..3a54ce387
--- /dev/null
+++ b/common/json_helpers.h
@@ -0,0 +1,22 @@
+/* More specialized (bitcoin, lightning-specific) JSON helpers. */
+#ifndef LIGHTNING_COMMON_JSON_HELPERS_H
+#define LIGHTNING_COMMON_JSON_HELPERS_H
+#include "config.h"
+#include <common/json.h>
+
+struct pubkey;
+struct short_channel_id;
+
+/* Extract a pubkey from this */
+bool json_to_pubkey(const char *buffer, const jsmntok_t *tok,
+		    struct pubkey *pubkey);
+
+/* Extract satoshis from this (may be a string, or a decimal number literal) */
+bool json_to_bitcoin_amount(const char *buffer, const jsmntok_t *tok,
+			    uint64_t *satoshi);
+
+/* Extract a short_channel_id from this */
+bool json_to_short_channel_id(const char *buffer, const jsmntok_t *tok,
+			      struct short_channel_id *scid);
+
+#endif /* LIGHTNING_COMMON_JSON_HELPERS_H */
diff --git a/common/json_tok.c b/common/json_tok.c
index 6174aa60f..b0b0d1cc2 100644
--- a/common/json_tok.c
+++ b/common/json_tok.c
@@ -1,3 +1,4 @@
+#include <ccan/crypto/sha256/sha256.h>
 #include <ccan/str/hex/hex.h>
 #include <ccan/tal/str/str.h>
 #include <common/json_command.h>
diff --git a/common/json_tok.h b/common/json_tok.h
index ff6434f38..0a0e33d1c 100644
--- a/common/json_tok.h
+++ b/common/json_tok.h
@@ -2,10 +2,13 @@
 #ifndef LIGHTNING_COMMON_JSON_TOK_H
 #define LIGHTNING_COMMON_JSON_TOK_H
 #include "config.h"
+#include <ccan/short_types/short_types.h>
 #include <common/json.h>
 
 struct command;
 struct command_result;
+struct json_escaped;
+struct sha256;
 
 /* Extract json array token */
 struct command_result *param_array(struct command *cmd, const char *name,
diff --git a/common/test/run-json.c b/common/test/run-json.c
index 71e4b7069..dff25ad61 100644
--- a/common/test/run-json.c
+++ b/common/test/run-json.c
@@ -1,4 +1,5 @@
 #include "../json.c"
+#include "../json_helpers.c"
 #include <ccan/mem/mem.h>
 #include <common/utils.h>
 #include <stdio.h>
diff --git a/lightningd/Makefile b/lightningd/Makefile
index e491e534e..eaf3a5e1e 100644
--- a/lightningd/Makefile
+++ b/lightningd/Makefile
@@ -35,6 +35,7 @@ LIGHTNINGD_COMMON_OBJS :=			\
 	common/io_lock.o			\
 	common/json.o				\
 	common/json_escaped.o			\
+	common/json_helpers.o			\
 	common/json_tok.o			\
 	common/memleak.o			\
 	common/msg_queue.o			\
diff --git a/lightningd/bitcoind.c b/lightningd/bitcoind.c
index 9baa22e71..6a3b986dd 100644
--- a/lightningd/bitcoind.c
+++ b/lightningd/bitcoind.c
@@ -14,7 +14,7 @@
 #include <ccan/tal/grab_file/grab_file.h>
 #include <ccan/tal/path/path.h>
 #include <ccan/tal/str/str.h>
-#include <common/json.h>
+#include <common/json_helpers.h>
 #include <common/memleak.h>
 #include <common/timeout.h>
 #include <common/utils.h>
diff --git a/lightningd/connect_control.c b/lightningd/connect_control.c
index 0648419a9..1b405d5f7 100644
--- a/lightningd/connect_control.c
+++ b/lightningd/connect_control.c
@@ -5,6 +5,7 @@
 #include <ccan/tal/str/str.h>
 #include <common/features.h>
 #include <common/json_command.h>
+#include <common/json_helpers.h>
 #include <common/jsonrpc_errors.h>
 #include <common/memleak.h>
 #include <common/param.h>
diff --git a/lightningd/gossip_control.c b/lightningd/gossip_control.c
index 30e8c2256..544ba0af6 100644
--- a/lightningd/gossip_control.c
+++ b/lightningd/gossip_control.c
@@ -13,6 +13,7 @@
 #include <common/features.h>
 #include <common/json_command.h>
 #include <common/json_escaped.h>
+#include <common/json_helpers.h>
 #include <common/jsonrpc_errors.h>
 #include <common/param.h>
 #include <common/type_to_string.h>
diff --git a/lightningd/json.c b/lightningd/json.c
index a4d79b553..88614747e 100644
--- a/lightningd/json.c
+++ b/lightningd/json.c
@@ -5,6 +5,7 @@
 #include <common/json.h>
 #include <common/json_command.h>
 #include <common/json_escaped.h>
+#include <common/json_helpers.h>
 #include <common/jsonrpc_errors.h>
 #include <common/memleak.h>
 #include <common/param.h>
@@ -97,13 +98,6 @@ void json_add_txid(struct json_stream *result, const char *fieldname,
 	json_add_string(result, fieldname, hex);
 }
 
-bool json_to_pubkey(const char *buffer, const jsmntok_t *tok,
-		    struct pubkey *pubkey)
-{
-	return pubkey_from_hexstr(buffer + tok->start,
-				  tok->end - tok->start, pubkey);
-}
-
 struct command_result *param_pubkey(struct command *cmd, const char *name,
 				    const char *buffer, const jsmntok_t *tok,
 				    struct pubkey **pubkey)
@@ -126,13 +120,6 @@ void json_add_short_channel_id(struct json_stream *response,
 			type_to_string(response, struct short_channel_id, id));
 }
 
-bool json_to_short_channel_id(const char *buffer, const jsmntok_t *tok,
-			      struct short_channel_id *scid)
-{
-	return (short_channel_id_from_str(buffer + tok->start,
-					  tok->end - tok->start, scid));
-}
-
 struct command_result *param_short_channel_id(struct command *cmd,
 					      const char *name,
 					      const char *buffer,
diff --git a/lightningd/json.h b/lightningd/json.h
index 984f0379a..8d02a7712 100644
--- a/lightningd/json.h
+++ b/lightningd/json.h
@@ -47,18 +47,10 @@ void json_add_pubkey(struct json_stream *response,
 void json_add_txid(struct json_stream *result, const char *fieldname,
 		   const struct bitcoin_txid *txid);
 
-/* Extract a pubkey from this */
-bool json_to_pubkey(const char *buffer, const jsmntok_t *tok,
-		    struct pubkey *pubkey);
-
 struct command_result *param_pubkey(struct command *cmd, const char *name,
 				    const char *buffer, const jsmntok_t *tok,
 				    struct pubkey **pubkey);
 
-/* Extract a short_channel_id from this */
-bool json_to_short_channel_id(const char *buffer, const jsmntok_t *tok,
-			      struct short_channel_id *scid);
-
 struct command_result *param_short_channel_id(struct command *cmd,
 					      const char *name,
 					      const char *buffer,
diff --git a/lightningd/peer_control.c b/lightningd/peer_control.c
index e28c65f7c..b11fe80b9 100644
--- a/lightningd/peer_control.c
+++ b/lightningd/peer_control.c
@@ -16,6 +16,7 @@
 #include <common/features.h>
 #include <common/initial_commit_tx.h>
 #include <common/json_command.h>
+#include <common/json_helpers.h>
 #include <common/jsonrpc_errors.h>
 #include <common/key_derive.h>
 #include <common/param.h>
diff --git a/lightningd/test/run-jsonrpc.c b/lightningd/test/run-jsonrpc.c
index 09055b6e3..1d35b022b 100644
--- a/lightningd/test/run-jsonrpc.c
+++ b/lightningd/test/run-jsonrpc.c
@@ -21,6 +21,14 @@ const char *feerate_name(enum feerate feerate UNNEEDED)
 /* Generated stub for fmt_wireaddr_without_port */
 char *fmt_wireaddr_without_port(const tal_t *ctx UNNEEDED, const struct wireaddr *a UNNEEDED)
 { fprintf(stderr, "fmt_wireaddr_without_port called!\n"); abort(); }
+/* Generated stub for json_to_pubkey */
+bool json_to_pubkey(const char *buffer UNNEEDED, const jsmntok_t *tok UNNEEDED,
+		    struct pubkey *pubkey UNNEEDED)
+{ fprintf(stderr, "json_to_pubkey called!\n"); abort(); }
+/* Generated stub for json_to_short_channel_id */
+bool json_to_short_channel_id(const char *buffer UNNEEDED, const jsmntok_t *tok UNNEEDED,
+			      struct short_channel_id *scid UNNEEDED)
+{ fprintf(stderr, "json_to_short_channel_id called!\n"); abort(); }
 /* Generated stub for log_ */
 void log_(struct log *log UNNEEDED, enum log_level level UNNEEDED, const char *fmt UNNEEDED, ...)