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hsmtool: add a 'testnet' option to 'dumponchaindescriptors'

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Actually, it's more complex to translate the xpub descriptor to
testnet because of the descriptor checksum.

Signed-off-by: Antoine Poinsot <darosior@protonmail.com>
This commit is contained in:
Antoine Poinsot 2020-11-01 15:06:35 +01:00 committed by neil saitug
parent 9f8e2e0502
commit 09fb34c6f3
1 changed files with 21 additions and 6 deletions
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27
tools/hsmtool.c
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@ -41,7 +41,8 @@ static void show_usage(const char *progname)
printf(" - guesstoremote <P2WPKH address> <node id> <tries> "
"<path/to/hsm_secret> [hsm_secret password]\n");
printf(" - generatehsm <path/to/new//hsm_secret>\n");
printf(" - dumponchaindescriptors <path/to/hsm_secret> <password>\n");
printf(" - dumponchaindescriptors <path/to/hsm_secret> [password] "
"[network]\n");
exit(0);
}
@ -516,11 +517,14 @@ static int generate_hsm(const char *hsm_secret_path)
return 0;
}
static int dumponchaindescriptors(const char *hsm_secret_path, const char *passwd)
static int dumponchaindescriptors(const char *hsm_secret_path, const char *passwd,
const bool is_testnet)
{
struct secret hsm_secret;
u8 bip32_seed[BIP32_ENTROPY_LEN_256];
u32 salt = 0;
u32 version = is_testnet ?
BIP32_VER_TEST_PRIVATE : BIP32_VER_MAIN_PRIVATE;
struct ext_key master_extkey;
char *enc_xpub, *descriptor;
struct descriptor_checksum checksum;
@ -541,9 +545,7 @@ static int dumponchaindescriptors(const char *hsm_secret_path, const char *passw
salt++;
/* ..Which is used to derive m/ */
} while (bip32_key_from_seed(bip32_seed, sizeof(bip32_seed),
/* An xpub can easily be converted to a tpub */
BIP32_VER_MAIN_PRIVATE,
0, &master_extkey) != WALLY_OK);
version, 0, &master_extkey) != WALLY_OK);
if (bip32_key_to_base58(&master_extkey, BIP32_FLAG_KEY_PUBLIC, &enc_xpub) != WALLY_OK)
errx(ERROR_LIBWALLY, "Can't encode xpub");
@ -629,10 +631,23 @@ int main(int argc, char *argv[])
}
if (streq(method, "dumponchaindescriptors")) {
bool is_testnet;
if (argc < 3)
show_usage(argv[0]);
return dumponchaindescriptors(argv[2], argc > 3 ? argv[3] : NULL);
if (argc > 4) {
is_testnet = streq(argv[4], "testnet");
if (!is_testnet && !streq(argv[4], "bitcoin"))
errx(ERROR_USAGE, "Network '%s' not supported."
" Supported networks: bitcoin (default),"
" testnet",
argv[4]);
} else
is_testnet = false;
return dumponchaindescriptors(argv[2],
argc > 3 && !streq(argv[3], "") ? argv[3] : NULL,
is_testnet);
}
show_usage(argv[0]);