Various fixes to fix the "we don't choose direct routes" problem.

CHANGELOG.md

@@ -11,11 +11,13 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 - plugins: fully enabled, and ready for you to write some!
 - plugins: `pay` is now a plugin.
+- protocol: `pay` will now use routehints in invoices if it needs to.
 - lightning-cli: `help <cmd>` finds man pages even if `make install` not run.
 - JSON API: `waitsendpay` now has an `erring_direction` field.
 - JSON API: `listpeers` now has a `direction` field in `channels`.
 - JSON API: `listchannels` now takes a `source` option to filter by node id.
 - JSON API: New command `paystatus` gives detailed information on `pay` commands.
+- JSON API: `getroute` `riskfactor` argument is simplified; `pay` now defaults to setting it to 10.
 
 ### Changed
 
@@ -38,6 +40,8 @@ changes.
   (eg. 4 billion) was slow due to a bug.
 - Fixed occasional deadlock with peers when exchanging huge amounts of gossip.
 - You can no longer make giant unpayable "wumbo" invoices.
+- CLTV of total route now correctly evaluated when finding best route.
+- `riskfactor` arguments to `pay` and `getroute` now have an effect.
 
 ### Security
 

common/pseudorand.c

@@ -37,6 +37,13 @@ uint64_t pseudorand(uint64_t max)
 	return isaac64_next_uint(&isaac64, max);
 }
 
+uint64_t pseudorand_u64(void)
+{
+	init_if_needed();
+
+	return isaac64_next_uint64(&isaac64);
+}
+
 const struct siphash_seed *siphash_seed(void)
 {
 	init_if_needed();

common/pseudorand.h

@@ -8,6 +8,11 @@
  */
 uint64_t pseudorand(uint64_t max);
 
+/**
+ * pseudorand - pseudo (guessable!) random number between 0 and UINT64_MAX.
+ */
+uint64_t pseudorand_u64(void);
+
 /**
  * Get the siphash seed for hash tables.
  */