254 block receipts reminder (#294)

* #254 checkpoint: added badger db initialization code

* #254  checkpoint: added insert and get wrapper for badgerdb

* #254 checkpoint: inject KVDb to block core service

* #254 add new config for badger db path

* #254 add new blocker typefor duplicate data detection

* #254 add constant for block reminder receipt in kvdb

* #254 generate receipt code for transaction and block data broadcasting

* #254 kvdb integration for receipt

* #254 add badger db test

* #254 add testdata directory for database tests

* #254 exclude sync.noCopy rule from govet for test files

* #254 tests for generating block and transaction receipt

* #254 add expiration to inserted kvdb record

Author: andy-shi88

.golangci.yml

@@ -107,6 +107,10 @@ issues:
       linters:
         - scopelint
         - unused
+    - path: "(.+)_test.go"
+      text: "sync.noCopy"
+      linters:
+        - govet
     - text: "File is not `goimports`-ed"
       linters:
         - goimports