Base reconnect (#74)

* update reconnectChainSDK

* update utils

chain/chain.go

@@ -109,11 +109,10 @@ func (c *ChainSDK) Reconnect() error {
  c.api.Client.Close()
  }
  c.api = nil
- c.api, err = reconnectChainSDK(c.rpcAddr)
- if err != nil {
- return err
- }
- c.metadata, err = c.api.RPC.State.GetMetadataLatest()
+ c.metadata = nil
+ c.runtimeVersion = nil
+ c.keyEvents = nil
+ c.api, c.metadata, c.runtimeVersion, c.keyEvents, c.genesisHash, err = reconnectChainSDK(c.rpcAddr)
  if err != nil {
  return err
  }
@@ -164,18 +163,51 @@ func (c *ChainSDK) Verify(msg []byte, sig []byte) (bool, error) {
  return signature.Verify(msg, sig, c.keyring.URI)
 }
 
-func reconnectChainSDK(rpcAddr []string) (*gsrpc.SubstrateAPI, error) {
+func reconnectChainSDK(rpcs []string) (
+ *gsrpc.SubstrateAPI,
+ *types.Metadata,
+ *types.RuntimeVersion,
+ types.StorageKey,
+ types.Hash,
+ error,
+) {
  var err error
  var api *gsrpc.SubstrateAPI
+
  defer log.SetOutput(os.Stdout)
  log.SetOutput(io.Discard)
- for i := 0; i < len(rpcAddr); i++ {
- api, err = gsrpc.NewSubstrateAPI(rpcAddr[i])
- if err == nil {
- return api, nil
+ for i := 0; i < len(rpcs); i++ {
+ api, err = gsrpc.NewSubstrateAPI(rpcs[i])
+ if err != nil {
+ continue
  }
  }
- return api, err
+ if api == nil {
+ return nil, nil, nil, nil, types.Hash{}, pattern.ERR_RPC_CONNECTION
+ }
+ var metadata *types.Metadata
+ var runtimeVer *types.RuntimeVersion
+ var keyEvents types.StorageKey
+ var genesisHash types.Hash
+
+ metadata, err = api.RPC.State.GetMetadataLatest()
+ if err != nil {
+ return nil, nil, nil, nil, types.Hash{}, pattern.ERR_RPC_CONNECTION
+ }
+ genesisHash, err = api.RPC.Chain.GetBlockHash(0)
+ if err != nil {
+ return nil, nil, nil, nil, types.Hash{}, pattern.ERR_RPC_CONNECTION
+ }
+ runtimeVer, err = api.RPC.State.GetRuntimeVersionLatest()
+ if err != nil {
+ return nil, nil, nil, nil, types.Hash{}, pattern.ERR_RPC_CONNECTION
+ }
+ keyEvents, err = types.CreateStorageKey(metadata, pattern.SYSTEM, pattern.EVENTS, nil)
+ if err != nil {
+ return nil, nil, nil, nil, types.Hash{}, pattern.ERR_RPC_CONNECTION
+ }
+
+ return api, metadata, runtimeVer, keyEvents, genesisHash, err
 }
 
 func createPrefixedKey(pallet, method string) []byte {

chain/fileBank.go

@@ -932,7 +932,7 @@ func (c *ChainSDK) ReplaceIdleFiles(roothash []pattern.FileHash) (string, []patt
  }
  err = types.EventRecordsRaw(*h).DecodeEventRecords(c.metadata, &events)
  if err != nil || len(events.FileBank_ReplaceFiller) > 0 {
- return txhash, events.FileBank_ReplaceFiller[0].Filler_list, nil
+ return txhash, nil, nil
  }
  return txhash, nil, errors.New(pattern.ERR_Failed)
  }

config/config.go

@@ -40,7 +40,7 @@ func (cfg *Config) NewSDK(roleName string) (sdk.SDK, error) {
  if roleName != CharacterName_Bucket &&
  roleName != CharacterName_Deoss &&
  roleName != CharacterName_Client {
- return nil, fmt.Errorf("invalid character name")
+ return nil, fmt.Errorf("invalid role name")
  }
  return chain.NewChainSDK(roleName, cfg.Rpc, cfg.Mnemonic, cfg.Timeout)
 }

core/utils/hash.go

@@ -60,3 +60,24 @@ func CalcMD5(data string) ([]byte, error) {
  m := md5.Sum([]byte(data))
  return m[:], nil
 }
+
+// CalcPathSHA256 is used to calculate the sha256 value
+// of a file with a given path.
+func CalcPathSHA256Bytes(fpath string) ([]byte, error) {
+ f, err := os.Open(fpath)
+ if err != nil {
+ return nil, err
+ }
+ defer f.Close()
+ return CalcFileSHA256Bytes(f)
+}
+
+// CalcFileSHA256 is used to calculate the sha256 value
+// of the file type.
+func CalcFileSHA256Bytes(f *os.File) ([]byte, error) {
+ h := sha256.New()
+ if _, err := io.Copy(h, f); err != nil {
+ return nil, err
+ }
+ return h.Sum(nil), nil
+}