bookkeeper: save last timestamp to avoid another query in find_consolidated_fees.

If the fees are not *all* of the fees (as we do in next patch), the
query would be wrong.  Plus, as the FIXME suggests, we should just save
it as we're getting the fee_sums, not do a whole new query!

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

plugins/bkpr/incomestmt.c

@@ -290,11 +290,7 @@ static struct onchain_fee **find_consolidated_fees(const tal_t *ctx,
 		fee->debit = AMOUNT_MSAT(0);
 		fee->acct_name = tal_steal(fee, sums[i]->acct_name);
 		fee->txid = *sums[i]->txid;
-
-		fee->timestamp =
-			onchain_fee_last_timestamp(bkpr, sums[i]->acct_name,
-						   sums[i]->txid);
-
+		fee->timestamp = sums[i]->last_timestamp;
 		tal_arr_expand(&fee_sums, fee);
 	}
 

plugins/bkpr/onchain_fee.c

@@ -366,10 +366,13 @@ static struct fee_sum **fee_sums_by_txid_and_account(const tal_t *ctx,
 			sum->txid = tal_dup(sum, struct bitcoin_txid,
 					    &ofs[i]->txid);
 			credit = debit = AMOUNT_MSAT(0);
+			sum->last_timestamp = 0;
 		}
 		ok = amount_msat_accumulate(&credit, ofs[i]->credit);
 		assert(ok);
 		ok = amount_msat_accumulate(&debit, ofs[i]->debit);
+		if (ofs[i]->timestamp > sum->last_timestamp)
+			sum->last_timestamp = ofs[i]->timestamp;
 	}
 
 	/* Final, if any */
@@ -679,24 +682,6 @@ struct fee_sum **find_account_onchain_fees(const tal_t *ctx,
 	return fee_sums_by_txid_and_account(ctx, ofs);
 }
 
-/* FIXME: Put this value into fee_sums! */
-u64 onchain_fee_last_timestamp(const struct bkpr *bkpr,
-			       const char *acct_name,
-			       const struct bitcoin_txid *txid)
-{
-	struct onchain_fee **ofs;
-	u64 timestamp = 0;
-
-	ofs = account_get_chain_fees(tmpctx, bkpr, acct_name);
-	for (size_t i = 0; i < tal_count(ofs); i++) {
-		if (!bitcoin_txid_eq(&ofs[i]->txid, txid))
-			continue;
-		if (ofs[i]->timestamp > timestamp)
-			timestamp = ofs[i]->timestamp;
-	}
-	return timestamp;
-}
-
 /* If we're freeing the entire hash table, remove destructors from
  * individual entries! */
 static void ofees_hash_destroy(struct ofees_hash *ofees_hash)

plugins/bkpr/onchain_fee.h

@@ -67,11 +67,6 @@ struct fee_sum **find_account_onchain_fees(const tal_t *ctx,
 struct fee_sum **calculate_onchain_fee_sums(const tal_t *ctx,
 					    const struct bkpr *bkpr);
 
-/* Find the last timestamp for the onchain fees for this txid + account */
-u64 onchain_fee_last_timestamp(const struct bkpr *bkpr,
-			       const char *acct_name,
-			       const struct bitcoin_txid *txid);
-
 /* Update our onchain fees now? */
 char *maybe_update_onchain_fees(const tal_t *ctx,
 				struct command *cmd,

plugins/bkpr/recorder.h

@@ -18,6 +18,7 @@ struct fee_sum {
 	const char *acct_name;
 	struct bitcoin_txid *txid;
 	struct amount_msat fees_paid;
+	u64 last_timestamp;
 };
 
 struct txo_pair {