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devtools: enhance bolt12-cli to convert to/from hex

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This makes it easier to add/delete fields manually to a bolt12 encoding.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2022-09-29 13:19:03 +09:30
parent 2fbe0f59f1
commit 125b17b7fc
1 changed files with 64 additions and 3 deletions
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67
devtools/bolt12-cli.c
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@ -461,13 +461,16 @@ int main(int argc, char *argv[])
char *hrp;
u8 *data;
char *fail;
bool to_hex = false;
common_setup(argv[0]);
deprecated_apis = true;
opt_set_alloc(opt_allocfn, tal_reallocfn, tal_freefn);
opt_register_noarg("--help|-h", opt_usage_and_exit,
"<decode> <bolt12>", "Show this message");
"decode|decodehex <bolt12>\n"
"encodehex <hrp> <hexstr>...",
"Show this message");
opt_register_version();
opt_early_parse(argc, argv, opt_log_stderr_exit);
@ -478,8 +481,37 @@ int main(int argc, char *argv[])
errx(ERROR_USAGE, "Need at least one argument\n%s",
opt_usage(argv[0], NULL));
if (!streq(method, "decode"))
errx(ERROR_USAGE, "Need decode argument\n%s",
if (streq(method, "encodehex")) {
char *nospaces;
if (argc < 4)
errx(ERROR_USAGE, "Need hrp and hexstr...\n%s",
opt_usage(argv[0], NULL));
nospaces = tal_arr(ctx, char, 0);
for (size_t i = 3; i < argc; i++) {
const char *src;
for (src = argv[i]; *src; src++) {
if (cisspace(*src))
continue;
tal_arr_expand(&nospaces, *src);
}
}
data = tal_hexdata(ctx, nospaces, tal_bytelen(nospaces));
if (!data)
errx(ERROR_USAGE, "Invalid hexstr\n%s",
opt_usage(argv[0], NULL));
printf("%s\n", to_bech32_charset(ctx, argv[2], data));
goto out;
}
if (streq(method, "decode"))
to_hex = false;
else if (streq(method, "decodehex"))
to_hex = true;
else
errx(ERROR_USAGE,
"Need encodehex/decode/decodehex argument\n%s",
opt_usage(argv[0], NULL));
if (!argv[2])
@ -490,6 +522,34 @@ int main(int argc, char *argv[])
errx(ERROR_USAGE, "Bad bech32 string\n%s",
opt_usage(argv[0], NULL));
if (to_hex) {
const u8 *cursor = data;
size_t max = tal_bytelen(data);
printf("%s %s\n", hrp, tal_hex(ctx, data));
/* Now break down each element */
while (max) {
bigsize_t len;
const u8 *s = cursor;
fromwire_bigsize(&cursor, &max);
if (!cursor)
errx(ERROR_BAD_DECODE, "Bad type");
printf("%s ", tal_hexstr(ctx, s, cursor - s));
s = cursor;
len = fromwire_bigsize(&cursor, &max);
if (!cursor)
errx(ERROR_BAD_DECODE, "Bad len");
printf("%s ", tal_hexstr(ctx, s, cursor - s));
s = cursor;
fromwire(&cursor, &max, NULL, len);
if (!cursor)
errx(ERROR_BAD_DECODE, "Bad value");
printf("%s\n", tal_hexstr(ctx, s, cursor - s));
}
goto out;
}
if (streq(hrp, "lno")) {
const struct tlv_offer *offer
= offer_decode(ctx, argv[2], strlen(argv[2]),
@ -657,6 +717,7 @@ int main(int argc, char *argv[])
} else
errx(ERROR_BAD_DECODE, "Unknown prefix %s", hrp);
out:
tal_free(ctx);
common_shutdown();