add signet support

bitcoin/chainparams.c

@@ -9,6 +9,8 @@
 #define BIP32_VER_MAIN_PRIVATE 0x0488ADE4
 #define BIP32_VER_TEST_PUBLIC  0x043587CF
 #define BIP32_VER_TEST_PRIVATE 0x04358394
+#define BIP32_VER_SIGT_PUBLIC  0x043587CF
+#define BIP32_VER_SIGT_PRIVATE 0x04358394
 
 const struct chainparams networks[] = {
     {.network_name = "bitcoin",
@@ -48,6 +50,21 @@ const struct chainparams networks[] = {
      .p2sh_version = 196,
      .testnet = true,
      .bip32_key_version = {.bip32_pubkey_version = BIP32_VER_TEST_PUBLIC, .bip32_privkey_version = BIP32_VER_TEST_PRIVATE}},
+    {.network_name = "signet",
+     .bip173_name = "sb",
+     .bip70_name = "signet",
+     .genesis_blockhash = {{{.u.u8 = {0x2d, 0x09, 0x8b, 0x08, 0x55, 0x1b, 0xf3, 0xda, 0xb1, 0xa2, 0x72, 0xa8, 0x71, 0x4a, 0x12, 0x9d, 0x06, 0x5c, 0xfb, 0x32, 0xfa, 0x7e, 0x18, 0xdf, 0x00, 0x99, 0x09, 0x5f, 0xbc, 0xd8, 0x53, 0x62}}}},
+     .rpc_port = 38332,
+     .cli = "bitcoin-cli",
+     .cli_args = "-signet",
+     .dust_limit = { 546 },
+     .max_funding = AMOUNT_SAT_INIT((1 << 24) - 1),
+     .max_payment = AMOUNT_MSAT_INIT(0xFFFFFFFFULL),
+     .when_lightning_became_cool = 1,
+     .p2pkh_version = 125,
+     .p2sh_version = 87,
+     .testnet = true,
+     .bip32_key_version = {.bip32_pubkey_version = BIP32_VER_SIGT_PUBLIC, .bip32_privkey_version = BIP32_VER_SIGT_PRIVATE}},
     {.network_name = "testnet",
      .bip173_name = "tb",
      .bip70_name = "test",

doc/lightningd-config.5

@@ -82,6 +82,12 @@ Alias for
 \fInetwork=testnet\fR\&.
 .RE
 .PP
+\fBsignet\fR
+.RS 4
+Alias for
+\fInetwork=signet\fR\&.
+.RE
+.PP
 \fBmainnet\fR
 .RS 4
 Alias for

doc/lightningd-config.5.txt

@@ -67,6 +67,9 @@ Bitcoin control options:
 *testnet*::
     Alias for 'network=testnet'.
 
+*signet*::
+    Alias for 'network=signet'.
+
 *mainnet*::
     Alias for 'network=bitcoin'.
 

lightningd/jsonrpc.c

@@ -976,11 +976,11 @@ void jsonrpc_listen(struct jsonrpc *jsonrpc, struct lightningd *ld)
 
 /**
  * segwit_addr_net_decode - Try to decode a Bech32 address and detect
- * testnet/mainnet/regtest
+ * testnet/mainnet/regtest/signet
  *
  * This processes the address and returns a string if it is a Bech32
  * address specified by BIP173. The string is set whether it is
- * testnet ("tb"),  mainnet ("bc"), or regtest ("bcrt")
+ * testnet ("tb"),  mainnet ("bc"), regtest ("bcrt"), or signet ("sb")
  * It does not check, witness version and program size restrictions.
  *
  *  Out: witness_version: Pointer to an int that will be updated to contain

lightningd/options.c

@@ -220,6 +220,11 @@ static char *opt_set_testnet(struct lightningd *ld)
 	return opt_set_network("testnet", ld);
 }
 
+static char *opt_set_signet(struct lightningd *ld)
+{
+	return opt_set_network("signet", ld);
+}
+
 static char *opt_set_mainnet(struct lightningd *ld)
 {
 	return opt_set_network("bitcoin", ld);
@@ -403,6 +408,8 @@ static void config_register_opts(struct lightningd *ld)
 			       " regtest, litecoin or litecoin-testnet)");
 	opt_register_early_noarg("--testnet", opt_set_testnet, ld,
 				 "Alias for --network=testnet");
+	opt_register_early_noarg("--signet", opt_set_signet, ld,
+				 "Alias for --network=signet");
 	opt_register_early_noarg("--mainnet", opt_set_mainnet, ld,
 				 "Alias for --network=bitcoin");
 	opt_register_early_arg("--allow-deprecated-apis",
@@ -1022,6 +1029,7 @@ static void add_config(struct lightningd *ld,
 		    || opt->cb == (void *)version_and_exit
 		    /* These two show up as --network= */
 		    || opt->cb == (void *)opt_set_testnet
+		    || opt->cb == (void *)opt_set_signet
 		    || opt->cb == (void *)opt_set_mainnet
 		    || opt->cb == (void *)opt_lightningd_usage
 		    || opt->cb == (void *)test_subdaemons_and_exit