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elements: Do not get upset if we see a confidential asset or value

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I made some assumptions that turn out not to be true, mea culpa.
This commit is contained in:
Christian Decker 2019-10-18 13:28:51 +02:00 committed by neil saitug
parent d35ec902f4
commit be49a599bc
1 changed files with 12 additions and 5 deletions
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15
bitcoin/tx.c
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@ -204,6 +204,8 @@ const u8 *bitcoin_tx_output_get_script(const tal_t *ctx,
return res; return res;
} }
/* FIXME(cdecker) Make the caller pass in a reference to amount_asset, and
* return false if unintelligible/encrypted. (WARN UNUSED). */
struct amount_asset bitcoin_tx_output_get_amount(const struct bitcoin_tx *tx, struct amount_asset bitcoin_tx_output_get_amount(const struct bitcoin_tx *tx,
int outnum) int outnum)
{ {
@ -216,13 +218,18 @@ struct amount_asset bitcoin_tx_output_get_amount(const struct bitcoin_tx *tx,
output = &tx->wtx->outputs[outnum]; output = &tx->wtx->outputs[outnum];
if (chainparams->is_elements) { if (chainparams->is_elements) {
/* We currently only support v1 asset tags */ assert(output->asset_len == sizeof(amount.asset));
assert(output->asset_len == sizeof(amount.asset) &&
output->asset[0] == 0x01);
memcpy(&amount.asset, output->asset, sizeof(amount.asset)); memcpy(&amount.asset, output->asset, sizeof(amount.asset));
/* We currently only support explicit value asset tags, others
* are confidential, so don't even try to assign a value to
* it. */
if (output->asset[0] == 0x01) {
memcpy(&raw, output->value + 1, sizeof(raw)); memcpy(&raw, output->value + 1, sizeof(raw));
amount.value = be64_to_cpu(raw); amount.value = be64_to_cpu(raw);
} else {
amount.value = 0;
}
} else { } else {
/* Do not assign amount.asset, we should never touch it in /* Do not assign amount.asset, we should never touch it in
* non-elements scenarios. */ * non-elements scenarios. */