From 5016f8d86a8f8d481a9331c4a394cb3a97660a0c Mon Sep 17 00:00:00 2001
From: Luke Dashjr <luke-jr+git@utopios.org>
Date: Sat, 23 Jul 2016 21:24:29 +0000
Subject: [PATCH] Parse transaction weights into blktxn_t structure

ABI break: sizeof(blktxn_t) has been increased, so accesses to blktmpl_t->txns[>0] use a different offset (aside, hash_ and txid are moved)
New ABI supports up to 512 MB transactions (with a max weight-per-bytes of 4), and library gracefully interprets larger weight values as -1 (unknown)
---
 blkmaker_jansson.c | 9 +++++++++
 blktemplate.h      | 1 +
 2 files changed, 10 insertions(+)

diff --git a/blkmaker_jansson.c b/blkmaker_jansson.c
index 709b7a8..8865683 100644
--- a/blkmaker_jansson.c
+++ b/blkmaker_jansson.c
@@ -163,6 +163,15 @@ const char *parse_txn(struct blktxn_t *txn, json_t *txnj) {
 		}
 	}
 	
+	txn->weight = -1;
+	if ((vv = json_object_get(txnj, "weight")) && json_is_number(vv)) {
+		const double f = json_number_value(txnj);
+		const int32_t i32 = f;
+		if (f == i32) {
+			txn->weight = i32;
+		}
+	}
+	
 	// TODO: dependcount/depends, fee, required, sigops
 	
 	return NULL;
diff --git a/blktemplate.h b/blktemplate.h
index d3a80c6..f048356 100644
--- a/blktemplate.h
+++ b/blktemplate.h
@@ -39,6 +39,7 @@ struct blktxn_t {
 	uint64_t fee;
 	bool required;
 	int16_t sigops;
+	int32_t weight;
 	
 	txnhash_t *hash_;
 	txnhash_t *txid;