namereg cleanup, tests

types/names.go

@@ -1,5 +1,40 @@
 package types
 
+import (
+	"regexp"
+)
+
+var (
+	MinNameRegistrationPeriod uint64 = 5
+
+	// cost for storing a name for a block is
+	// CostPerBlock*CostPerByte*(len(data) + 32)
+	NameCostPerByte  uint64 = 1
+	NameCostPerBlock uint64 = 1
+
+	MaxNameLength = 32
+	MaxDataLength = 1 << 16
+
+	// Name should be alphanum, underscore, slash
+	// Data should be anything permitted in JSON
+	regexpAlphaNum = regexp.MustCompile("^[a-zA-Z0-9_/]*$")
+	regexpJSON     = regexp.MustCompile(`^[a-zA-Z0-9_/ \-"':,\n\t.{}()\[\]]*$`)
+)
+
+// filter strings
+func validateNameRegEntryName(name string) bool {
+	return regexpAlphaNum.Match([]byte(name))
+}
+
+func validateNameRegEntryData(data string) bool {
+	return regexpJSON.Match([]byte(data))
+}
+
+// base cost is "effective" number of bytes
+func BaseEntryCost(name, data string) uint64 {
+	return uint64(len(data) + 32)
+}
+
 type NameRegEntry struct {
 	Name    string `json:"name"`    // registered name for the entry
 	Owner   []byte `json:"owner"`   // address that created the entry