X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning-block-sync%2Fsrc%2Fpoll.rs;h=e7171cf3656138036d50385691c96e419db29bcd;hb=974ba314a29fa35f2ed662b9357fa9cd701e444d;hp=9f7e8becf5060c2f62471825a2aa0cfeca573f5e;hpb=36834b3cef4ec65b73f7fff06941768f5d761b52;p=rust-lightning

diff --git a/lightning-block-sync/src/poll.rs b/lightning-block-sync/src/poll.rs
index 9f7e8bec..e7171cf3 100644
--- a/lightning-block-sync/src/poll.rs
+++ b/lightning-block-sync/src/poll.rs
@@ -136,8 +136,11 @@ impl ValidatedBlockHeader {
 
 		if let Network::Bitcoin = network {
 			if self.height % 2016 == 0 {
-				let previous_work = previous_header.header.work();
-				if work > (previous_work << 2) || work < (previous_work >> 2) {
+				let target = self.header.target();
+				let previous_target = previous_header.header.target();
+				let min_target = previous_target >> 2;
+				let max_target = previous_target << 2;
+				if target > max_target || target < min_target {
 					return Err(BlockSourceError::persistent("invalid difficulty transition"))
 				}
 			} else if self.header.bits != previous_header.header.bits {