dummy: valset changes and tests

types/validators.go

@@ -0,0 +1,24 @@
+package types
+
+import (
+	"bytes"
+)
+
+// validators implements sort
+
+type Validators []*Validator
+
+func (v Validators) Len() int {
+	return len(v)
+}
+
+// XXX: doesn't distinguish same validator with different power
+func (v Validators) Less(i, j int) bool {
+	return bytes.Compare(v[i].PubKey, v[j].PubKey) <= 0
+}
+
+func (v Validators) Swap(i, j int) {
+	v1 := v[i]
+	v[i] = v[j]
+	v[j] = v1
+}