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decode: fix handling of blinded_payinfo.

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Our pay code handles this correctly, but decode was still using an old model
where there was a payinfo per hop, not per path.

Reported-by: @t-bast
See: #5823
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2023-01-12 14:28:03 +10:30
parent 6eb7a4cbf2
commit 2dec805465
3 changed files with 55 additions and 40 deletions
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11
doc/lightning-decode.7.md
View file

@ -148,13 +148,14 @@ If **type** is "bolt12 invoice", and **valid** is *true*:
- **invoice\_paths** (array of objects): Paths to pay the destination:
- **first\_node\_id** (pubkey): the (presumably well-known) public key of the start of the path
- **blinding** (pubkey): blinding factor for this path
- **payinfo** (object):
- **fee\_base\_msat** (msat): basefee for path
- **fee\_proportional\_millionths** (u32): proportional fee for path
- **cltv\_expiry\_delta** (u32): CLTV delta for path
- **features** (hex): features allowed for path
- **path** (array of objects): an individual path:
- **blinded\_node\_id** (pubkey): node\_id of the hop
- **encrypted\_recipient\_data** (hex): encrypted TLV entry for this hop
- **fee\_base\_msat** (msat, optional): basefee for path
- **fee\_proportional\_millionths** (u32, optional): proportional fee for path
- **cltv\_expiry\_delta** (u32, optional): CLTV delta for path
- **features** (hex, optional): features allowed for path
- **invoice\_created\_at** (u64): the UNIX timestamp of invoice creation
- **invoice\_payment\_hash** (hex): the hash of the *payment\_preimage* (always 64 characters)
- **invoice\_amount\_msat** (msat): the amount required to fulfill invoice
@ -302,4 +303,4 @@ RESOURCES
Main web site: <https://github.com/ElementsProject/lightning>
[comment]: # ( SHA256STAMP:eadd9b06e6cb495a794568f3a9e2371c09718311c0b61ad05b0fca3014c429d3)
[comment]: # ( SHA256STAMP:a8843027b18a1d54efcf0ca423fc6fbe0c2136d32fa3d8c552a875b6844dd950)

45
doc/schemas/decode.schema.json
View file

@ -927,6 +927,7 @@
"required": [
"first_node_id",
"blinding",
"payinfo",
"path"
],
"additionalProperties": false,
@ -939,6 +940,34 @@
"type": "pubkey",
"description": "blinding factor for this path"
},
"payinfo": {
"type": "object",
"required": [
"fee_base_msat",
"fee_proportional_millionths",
"cltv_expiry_delta",
"features"
],
"additionalProperties": false,
"properties": {
"fee_base_msat": {
"type": "msat",
"description": "basefee for path"
},
"fee_proportional_millionths": {
"type": "u32",
"description": "proportional fee for path"
},
"cltv_expiry_delta": {
"type": "u32",
"description": "CLTV delta for path"
},
"features": {
"type": "hex",
"description": "features allowed for path"
}
}
},
"path": {
"type": "array",
"description": "an individual path",
@ -957,22 +986,6 @@
"encrypted_recipient_data": {
"type": "hex",
"description": "encrypted TLV entry for this hop"
},
"fee_base_msat": {
"type": "msat",
"description": "basefee for path"
},
"fee_proportional_millionths": {
"type": "u32",
"description": "proportional fee for path"
},
"cltv_expiry_delta": {
"type": "u32",
"description": "CLTV delta for path"
},
"features": {
"type": "hex",
"description": "features allowed for path"
}
}
}

39
plugins/offers.c
View file

@ -249,21 +249,11 @@ static void json_add_chains(struct json_stream *js,
static void json_add_onionmsg_path(struct json_stream *js,
const char *fieldname,
const struct onionmsg_hop *hop,
const struct blinded_payinfo *payinfo)
const struct onionmsg_hop *hop)
{
json_object_start(js, fieldname);
json_add_pubkey(js, "blinded_node_id", &hop->blinded_node_id);
json_add_hex_talarr(js, "encrypted_recipient_data", hop->encrypted_recipient_data);
if (payinfo) {
json_add_amount_msat_only(js, "fee_base_msat",
amount_msat(payinfo->fee_base_msat));
json_add_u32(js, "fee_proportional_millionths",
payinfo->fee_proportional_millionths);
json_add_u32(js, "cltv_expiry_delta",
payinfo->cltv_expiry_delta);
json_add_hex_talarr(js, "features", payinfo->features);
}
json_object_end(js);
}
@ -273,18 +263,28 @@ static bool json_add_blinded_paths(struct json_stream *js,
struct blinded_path **paths,
struct blinded_payinfo **blindedpay)
{
size_t n = 0;
json_array_start(js, fieldname);
for (size_t i = 0; i < tal_count(paths); i++) {
json_object_start(js, NULL);
json_add_pubkey(js, "first_node_id", &paths[i]->first_node_id);
json_add_pubkey(js, "blinding", &paths[i]->blinding);
/* Don't crash if we're short a payinfo! */
if (i < tal_count(blindedpay)) {
json_object_start(js, "payinfo");
json_add_amount_msat_only(js, "fee_base_msat",
amount_msat(blindedpay[i]->fee_base_msat));
json_add_u32(js, "fee_proportional_millionths",
blindedpay[i]->fee_proportional_millionths);
json_add_u32(js, "cltv_expiry_delta",
blindedpay[i]->cltv_expiry_delta);
json_add_hex_talarr(js, "features", blindedpay[i]->features);
json_object_end(js);
}
json_array_start(js, "path");
for (size_t j = 0; j < tal_count(paths[i]->path); j++) {
json_add_onionmsg_path(js, NULL, paths[i]->path[j],
n < tal_count(blindedpay)
? blindedpay[n] : NULL);
n++;
json_add_onionmsg_path(js, NULL, paths[i]->path[j]);
}
json_array_end(js);
json_object_end(js);
@ -295,9 +295,10 @@ static bool json_add_blinded_paths(struct json_stream *js,
* - MUST reject the invoice if `invoice_blindedpay` does not contain
* exactly one `blinded_payinfo` per `invoice_paths`.`blinded_path`.
*/
if (blindedpay && n != tal_count(blindedpay)) {
json_add_string(js, "warning_invalid_invoice_blindedpay",
"invoice does not have correct number of blinded_payinfo");
if (blindedpay && tal_count(blindedpay) != tal_count(paths)) {
json_add_str_fmt(js, "warning_invalid_invoice_blindedpay",
"invoice has %zu blinded_payinfo but %zu paths",
tal_count(blindedpay), tal_count(paths));
return false;
}