mirror of
https://github.com/aljazceru/lightning.git
synced 2025-12-20 15:44:21 +01:00
mfc: rm declarations; invert call chain
Move only.
This commit is contained in:
niftynei
@@ -621,11 +621,208 @@ This lets us initiate later with fundchannel_start with confidence that we
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can actually afford the channels we will create.
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*/
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static struct command_result *
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perform_channel_start(struct multifundchannel_command *mfc);
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static struct command_result *
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mfc_psbt_acquired(struct multifundchannel_command *mfc)
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{
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/* Add serials to all of our input/outputs, so they're stable
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* for the life of the tx */
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psbt_add_serials(mfc->psbt, TX_INITIATOR);
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/* We also mark all of our inputs as *ours*, so we
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* can easily identify them for `signpsbt`, later */
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for (size_t i = 0; i < mfc->psbt->num_inputs; i++)
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psbt_input_mark_ours(mfc->psbt, &mfc->psbt->inputs[i]);
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return perform_channel_start(mfc);
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}
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static struct command_result *
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after_newaddr(struct command *cmd,
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const char *buf,
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const jsmntok_t *result,
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struct multifundchannel_command *mfc)
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{
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const jsmntok_t *field;
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field = json_get_member(buf, result, "bech32");
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if (!field)
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plugin_err(cmd->plugin,
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"No bech32 field in newaddr result: %.*s",
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json_tok_full_len(result),
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json_tok_full(buf, result));
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if (json_to_address_scriptpubkey(mfc, chainparams, buf, field,
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&mfc->change_scriptpubkey)
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!= ADDRESS_PARSE_SUCCESS)
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plugin_err(cmd->plugin,
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"Unparseable bech32 field in newaddr result: %.*s",
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json_tok_full_len(result),
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json_tok_full(buf, result));
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return mfc_psbt_acquired(mfc);
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}
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static struct command_result *
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acquire_change_address(struct multifundchannel_command *mfc)
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{
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struct out_req *req;
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req = jsonrpc_request_start(mfc->cmd->plugin, mfc->cmd,
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"newaddr",
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&after_newaddr, &mfc_forward_error,
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mfc);
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json_add_string(req->js, "addresstype", "bech32");
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return send_outreq(mfc->cmd->plugin, req);
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}
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static struct command_result *
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handle_mfc_change(struct multifundchannel_command *mfc)
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{
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size_t change_weight;
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struct amount_sat change_fee, fee_paid, total_fee;
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struct amount_sat change_min_limit;
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/* Determine if adding a change output is worth it.
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* Get the weight of a change output and how much it
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* costs.
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*/
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change_weight = bitcoin_tx_output_weight(
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BITCOIN_SCRIPTPUBKEY_P2WPKH_LEN);
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/* To avoid 'off-by-one' errors due to rounding down
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* (which we do in `amount_tx_fee`), we find the total calculated
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* fees (estimated_weight + change weight @ feerate) and subtract
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* the originally calculated fees (estimated_weight @ feerate) */
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fee_paid = amount_tx_fee(mfc->feerate_per_kw,
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mfc->estimated_final_weight);
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total_fee = amount_tx_fee(mfc->feerate_per_kw,
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mfc->estimated_final_weight + change_weight);
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if (!amount_sat_sub(&change_fee, total_fee, fee_paid))
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abort();
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/* The limit is equal to the change_fee plus the dust limit. */
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if (!amount_sat_add(&change_min_limit,
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change_fee, chainparams->dust_limit))
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plugin_err(mfc->cmd->plugin,
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"Overflow dust limit and change fee.");
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/* Is the excess over the limit? */
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if (amount_sat_greater(mfc->excess_sat, change_min_limit)) {
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bool ok = amount_sat_sub(&mfc->change_amount,
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mfc->excess_sat, change_fee);
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assert(ok);
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mfc->change_needed = true;
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if (!mfc->change_scriptpubkey)
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return acquire_change_address(mfc);
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} else
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mfc->change_needed = false;
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return mfc_psbt_acquired(mfc);
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}
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/* If one of the destinations specified "all", figure out how much that is. */
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static struct command_result *
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compute_mfc_all(struct multifundchannel_command *mfc)
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{
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size_t all_index = SIZE_MAX;
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struct multifundchannel_destination *all_dest;
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assert(has_all(mfc));
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for (size_t i = 0; i < tal_count(mfc->destinations); ++i) {
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struct multifundchannel_destination *dest;
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dest = &mfc->destinations[i];
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if (dest->all) {
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assert(all_index == SIZE_MAX);
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all_index = i;
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continue;
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}
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/* Subtract the amount from the excess. */
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if (!amount_sat_sub(&mfc->excess_sat,
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mfc->excess_sat, dest->amount))
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/* Not enough funds! */
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return mfc_fail(mfc, FUND_CANNOT_AFFORD,
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"Insufficient funds.");
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}
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assert(all_index != SIZE_MAX);
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all_dest = &mfc->destinations[all_index];
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/* Is the excess above the dust amount? */
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if (amount_sat_less(mfc->excess_sat, chainparams->dust_limit))
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return mfc_fail(mfc, FUND_OUTPUT_IS_DUST,
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"Output 'all' %s would be dust",
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type_to_string(tmpctx, struct amount_sat,
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&mfc->excess_sat));
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/* Assign the remainder to the 'all' output. */
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all_dest->amount = mfc->excess_sat;
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if (!feature_negotiated(plugin_feature_set(mfc->cmd->plugin),
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all_dest->their_features,
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OPT_LARGE_CHANNELS)
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&& amount_sat_greater(all_dest->amount,
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chainparams->max_funding))
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all_dest->amount = chainparams->max_funding;
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/* Remove it from the excess. */
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bool ok = amount_sat_sub(&mfc->excess_sat,
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mfc->excess_sat, all_dest->amount);
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assert(ok);
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/* Remove the 'all' flag. */
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all_dest->all = false;
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/* Continue. */
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return handle_mfc_change(mfc);
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}
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static struct command_result *
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after_fundpsbt(struct command *cmd,
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const char *buf,
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const jsmntok_t *result,
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struct multifundchannel_command *mfc);
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struct multifundchannel_command *mfc)
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{
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const jsmntok_t *field;
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plugin_log(mfc->cmd->plugin, LOG_DBG,
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"mfc %"PRIu64": %s done.",
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mfc->id, mfc->utxos_str ? "utxopsbt" : "fundpsbt");
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field = json_get_member(buf, result, "psbt");
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if (!field)
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goto fail;
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mfc->psbt = psbt_from_b64(mfc,
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buf + field->start,
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field->end - field->start);
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if (!mfc->psbt)
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goto fail;
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field = json_get_member(buf, result, "feerate_per_kw");
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if (!field || !json_to_u32(buf, field, &mfc->feerate_per_kw))
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goto fail;
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field = json_get_member(buf, result, "estimated_final_weight");
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if (!field || !json_to_u32(buf, field, &mfc->estimated_final_weight))
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goto fail;
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/* msat LOL. */
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field = json_get_member(buf, result, "excess_msat");
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if (!field || !parse_amount_sat(&mfc->excess_sat,
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buf + field->start,
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field->end - field->start))
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goto fail;
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if (has_all(mfc))
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return compute_mfc_all(mfc);
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return handle_mfc_change(mfc);
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fail:
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plugin_err(mfc->cmd->plugin,
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"Unexpected result from fundpsbt/utxopsbt: %.*s",
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json_tok_full_len(result),
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json_tok_full(buf, result));
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}
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static struct command_result *
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perform_fundpsbt(struct multifundchannel_command *mfc)
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@@ -711,221 +908,6 @@ perform_fundpsbt(struct multifundchannel_command *mfc)
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return send_outreq(mfc->cmd->plugin, req);
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}
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static struct command_result *
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compute_mfc_all(struct multifundchannel_command *mfc);
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static struct command_result *
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handle_mfc_change(struct multifundchannel_command *mfc);
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static struct command_result *
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after_fundpsbt(struct command *cmd,
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const char *buf,
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const jsmntok_t *result,
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struct multifundchannel_command *mfc)
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{
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const jsmntok_t *field;
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plugin_log(mfc->cmd->plugin, LOG_DBG,
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"mfc %"PRIu64": %s done.",
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mfc->id, mfc->utxos_str ? "utxopsbt" : "fundpsbt");
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field = json_get_member(buf, result, "psbt");
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if (!field)
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goto fail;
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mfc->psbt = psbt_from_b64(mfc,
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buf + field->start,
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field->end - field->start);
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if (!mfc->psbt)
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goto fail;
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field = json_get_member(buf, result, "feerate_per_kw");
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if (!field || !json_to_u32(buf, field, &mfc->feerate_per_kw))
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goto fail;
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field = json_get_member(buf, result, "estimated_final_weight");
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if (!field || !json_to_u32(buf, field, &mfc->estimated_final_weight))
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goto fail;
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/* msat LOL. */
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field = json_get_member(buf, result, "excess_msat");
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if (!field || !parse_amount_sat(&mfc->excess_sat,
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buf + field->start,
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field->end - field->start))
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goto fail;
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if (has_all(mfc))
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return compute_mfc_all(mfc);
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return handle_mfc_change(mfc);
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fail:
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plugin_err(mfc->cmd->plugin,
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"Unexpected result from fundpsbt/utxopsbt: %.*s",
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json_tok_full_len(result),
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json_tok_full(buf, result));
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}
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/* If one of the destinations specified "all", figure out how much that is. */
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static struct command_result *
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compute_mfc_all(struct multifundchannel_command *mfc)
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{
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size_t all_index = SIZE_MAX;
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struct multifundchannel_destination *all_dest;
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assert(has_all(mfc));
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for (size_t i = 0; i < tal_count(mfc->destinations); ++i) {
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struct multifundchannel_destination *dest;
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dest = &mfc->destinations[i];
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if (dest->all) {
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assert(all_index == SIZE_MAX);
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all_index = i;
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continue;
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}
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/* Subtract the amount from the excess. */
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if (!amount_sat_sub(&mfc->excess_sat,
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mfc->excess_sat, dest->amount))
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/* Not enough funds! */
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return mfc_fail(mfc, FUND_CANNOT_AFFORD,
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"Insufficient funds.");
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}
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assert(all_index != SIZE_MAX);
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all_dest = &mfc->destinations[all_index];
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/* Is the excess above the dust amount? */
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if (amount_sat_less(mfc->excess_sat, chainparams->dust_limit))
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return mfc_fail(mfc, FUND_OUTPUT_IS_DUST,
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"Output 'all' %s would be dust",
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type_to_string(tmpctx, struct amount_sat,
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&mfc->excess_sat));
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/* Assign the remainder to the 'all' output. */
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all_dest->amount = mfc->excess_sat;
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if (!feature_negotiated(plugin_feature_set(mfc->cmd->plugin),
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all_dest->their_features,
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OPT_LARGE_CHANNELS)
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&& amount_sat_greater(all_dest->amount,
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chainparams->max_funding))
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all_dest->amount = chainparams->max_funding;
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/* Remove it from the excess. */
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bool ok = amount_sat_sub(&mfc->excess_sat,
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mfc->excess_sat, all_dest->amount);
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assert(ok);
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/* Remove the 'all' flag. */
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all_dest->all = false;
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/* Continue. */
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return handle_mfc_change(mfc);
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}
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static struct command_result *
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acquire_change_address(struct multifundchannel_command *mfc);
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static struct command_result *
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mfc_psbt_acquired(struct multifundchannel_command *mfc);
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static struct command_result *
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handle_mfc_change(struct multifundchannel_command *mfc)
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{
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size_t change_weight;
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struct amount_sat change_fee, fee_paid, total_fee;
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struct amount_sat change_min_limit;
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/* Determine if adding a change output is worth it.
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* Get the weight of a change output and how much it
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* costs.
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*/
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change_weight = bitcoin_tx_output_weight(
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BITCOIN_SCRIPTPUBKEY_P2WPKH_LEN);
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/* To avoid 'off-by-one' errors due to rounding down
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* (which we do in `amount_tx_fee`), we find the total calculated
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* fees (estimated_weight + change weight @ feerate) and subtract
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* the originally calculated fees (estimated_weight @ feerate) */
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fee_paid = amount_tx_fee(mfc->feerate_per_kw,
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mfc->estimated_final_weight);
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total_fee = amount_tx_fee(mfc->feerate_per_kw,
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mfc->estimated_final_weight + change_weight);
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if (!amount_sat_sub(&change_fee, total_fee, fee_paid))
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abort();
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/* The limit is equal to the change_fee plus the dust limit. */
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if (!amount_sat_add(&change_min_limit,
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change_fee, chainparams->dust_limit))
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plugin_err(mfc->cmd->plugin,
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"Overflow dust limit and change fee.");
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/* Is the excess over the limit? */
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if (amount_sat_greater(mfc->excess_sat, change_min_limit)) {
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bool ok = amount_sat_sub(&mfc->change_amount,
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mfc->excess_sat, change_fee);
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assert(ok);
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mfc->change_needed = true;
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if (!mfc->change_scriptpubkey)
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return acquire_change_address(mfc);
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} else
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mfc->change_needed = false;
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return mfc_psbt_acquired(mfc);
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}
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static struct command_result *
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after_newaddr(struct command *cmd,
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const char *buf,
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const jsmntok_t *result,
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struct multifundchannel_command *mfc);
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static struct command_result *
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acquire_change_address(struct multifundchannel_command *mfc)
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{
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struct out_req *req;
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req = jsonrpc_request_start(mfc->cmd->plugin, mfc->cmd,
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"newaddr",
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&after_newaddr, &mfc_forward_error,
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mfc);
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json_add_string(req->js, "addresstype", "bech32");
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return send_outreq(mfc->cmd->plugin, req);
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}
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static struct command_result *
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after_newaddr(struct command *cmd,
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const char *buf,
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const jsmntok_t *result,
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struct multifundchannel_command *mfc)
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{
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const jsmntok_t *field;
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field = json_get_member(buf, result, "bech32");
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if (!field)
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plugin_err(cmd->plugin,
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"No bech32 field in newaddr result: %.*s",
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json_tok_full_len(result),
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json_tok_full(buf, result));
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if (json_to_address_scriptpubkey(mfc, chainparams, buf, field,
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&mfc->change_scriptpubkey)
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!= ADDRESS_PARSE_SUCCESS)
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plugin_err(cmd->plugin,
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"Unparseable bech32 field in newaddr result: %.*s",
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json_tok_full_len(result),
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json_tok_full(buf, result));
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return mfc_psbt_acquired(mfc);
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}
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static struct command_result *
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perform_channel_start(struct multifundchannel_command *mfc);
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static struct command_result *
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mfc_psbt_acquired(struct multifundchannel_command *mfc)
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{
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/* Add serials to all of our input/outputs, so they're stable
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* for the life of the tx */
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psbt_add_serials(mfc->psbt, TX_INITIATOR);
|
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|
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/* We also mark all of our inputs as *ours*, so we
|
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* can easily identify them for `signpsbt`, later */
|
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for (size_t i = 0; i < mfc->psbt->num_inputs; i++)
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psbt_input_mark_ours(mfc->psbt, &mfc->psbt->inputs[i]);
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return perform_channel_start(mfc);
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}
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/*---------------------------------------------------------------------------*/
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Reference in New Issue
Block a user