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funder: handle RBF callback

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Fund an RBF same as you would an open. We dont' do anything fancy with
our inputs -- we dont' have a copy of the last PSBT that was sent.
This commit is contained in:
niftynei 2021-04-23 17:20:44 -05:00 committed by Rusty Russell
parent a293bf3269
commit 38b992b805
1 changed files with 71 additions and 0 deletions
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71
plugins/funder.c
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@ -539,6 +539,73 @@ json_openchannel2_call(struct command *cmd,
return send_outreq(cmd->plugin, req);
}
/* Peer has asked us to RBF */
static struct command_result *
json_rbf_channel_call(struct command *cmd,
const char *buf,
const jsmntok_t *params)
{
struct open_info *info = tal(cmd, struct open_info);
u64 feerate_our_max, feerate_our_min;
const char *err;
struct out_req *req;
err = json_scan(tmpctx, buf, params,
"{rbf_channel:"
"{id:%"
",channel_id:%"
",their_funding:%"
",funding_feerate_per_kw:%"
",feerate_our_max:%"
",feerate_our_min:%"
",locktime:%}}",
JSON_SCAN(json_to_node_id, &info->id),
JSON_SCAN(json_to_channel_id, &info->cid),
JSON_SCAN(json_to_sat, &info->their_funding),
JSON_SCAN(json_to_u64, &info->funding_feerate_perkw),
JSON_SCAN(json_to_u64, &feerate_our_max),
JSON_SCAN(json_to_u64, &feerate_our_min),
JSON_SCAN(json_to_u32, &info->locktime));
if (err)
plugin_err(cmd->plugin,
"`rbf_channel` payload did not scan %s: %.*s",
err, json_tok_full_len(params),
json_tok_full(buf, params));
/* If there's no channel_max, it's actually infinity */
err = json_scan(tmpctx, buf, params,
"{rbf_channel:{channel_max_msat:%}}",
JSON_SCAN(json_to_sat, &info->channel_max));
if (err)
info->channel_max = AMOUNT_SAT(UINT64_MAX);
/* We don't fund anything that's above or below our feerate */
if (info->funding_feerate_perkw < feerate_our_min
|| info->funding_feerate_perkw > feerate_our_max) {
plugin_log(cmd->plugin, LOG_DBG,
"their feerate %"PRIu64" is out of"
" our bounds (%"PRIu64"-%"PRIu64")",
info->funding_feerate_perkw,
feerate_our_min,
feerate_our_max);
return command_hook_success(cmd);
}
/* Figure out what our funds are... same flow
* as with openchannel2 callback. We assume that THEY
* will use the same inputs, so we use whatever we want here */
req = jsonrpc_request_start(cmd->plugin, cmd,
"listfunds",
&listfunds_success,
&listfunds_failed,
info);
return send_outreq(cmd->plugin, req);
}
static void json_disconnect(struct command *cmd,
const char *buf,
const jsmntok_t *params)
@ -751,6 +818,10 @@ const struct plugin_hook hooks[] = {
"openchannel2_sign",
json_openchannel2_sign_call,
},
{
"rbf_channel",
json_rbf_channel_call,
},
};
const struct plugin_notification notifs[] = {