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bolt11: better message when you try to 'lightning-cli pay' an onchain addr.

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Give a clear error at the beginning if it's not bolt11 payment,
rather than falling foul of other checks.

This will work at least until some altcoin adapts the 'ln' prefix :)

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2018-10-13 14:24:32 +10:30
parent e2f4359c08
commit 6af8f29392
1 changed files with 4 additions and 4 deletions
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8
common/bolt11.c
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@ -467,11 +467,11 @@ struct bolt11 *bolt11_decode(const tal_t *ctx, const char *str,
b11->routes = tal_arr(b11, struct route_info *, 0);
if (strlen(str) < 8)
return decode_fail(b11, fail, "Bad bech32 string");
if (!strstarts(str, "ln"))
return decode_fail(b11, fail, "Invoices must start with ln");
hrp = tal_arr(tmpctx, char, strlen(str) - 6);
data = tal_arr(tmpctx, u5, strlen(str) - 8);
hrp = tal_arr(tmpctx, char, strlen(str));
data = tal_arr(tmpctx, u5, strlen(str));
if (!bech32_decode(hrp, data, &data_len, str, (size_t)-1))
return decode_fail(b11, fail, "Bad bech32 string");