New methods for validation package (#17)

* Add func for GET HTTP request

* Add GetHTTPResponseCode to pkg

* Add methods for getting external asset info

* Make separate jobs for CI

.github/workflows/ci.yml

@@ -2,29 +2,41 @@ name: CI
 
 on:
   push:
-    branches: [ main ]
+    branches: [ master ]
   pull_request:
-    branches: [ main ]
+    branches: [ master ]
 
 jobs:
   test:
-    name: Unit
+    name: Unit test
     runs-on: ubuntu-latest
     steps:
-      - name: Set up Go 1.17
+      - name: Set up Go
         uses: actions/setup-go@v2
         with:
           go-version: 1.17
         id: go
 
       - name: Check out code
         uses: actions/checkout@v2
-
       - name: Get dependencies
         run: |
           go get -v -t -d ./...
       - name: Unit Test
         run: make test
 
+  check:
+    name: Linter
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.17
+        id: go
+
+      - name: Check out code
+        uses: actions/checkout@v2
+
       - name: Lint
-        run: make lint
+        run: make lint

go.mod

@@ -15,6 +15,7 @@ require (
 	github.com/magiconair/properties v1.8.5 // indirect
 	github.com/mitchellh/mapstructure v1.4.1 // indirect
 	github.com/pelletier/go-toml v1.9.3 // indirect
+	github.com/pkg/errors v0.9.1
 	github.com/spf13/afero v1.6.0 // indirect
 	github.com/spf13/cast v1.3.1 // indirect
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect

go.sum

@@ -233,6 +233,8 @@ github.com/patrickmn/go-cache v2.1.0+incompatible/go.mod h1:3Qf8kWWT7OJRJbdiICTK
 github.com/pelletier/go-toml v1.9.3 h1:zeC5b1GviRUyKYd6OJPvBU/mcVDVoL1OhT17FCt5dSQ=
 github.com/pelletier/go-toml v1.9.3/go.mod h1:u1nR/EPcESfeI/szUZKdtJ0xRNbUoANCkoOuaOx1Y+c=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/sftp v1.10.1/go.mod h1:lYOWFsE0bwd1+KfKJaKeuokY15vzFx25BLbzYYoAxZI=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=

pkg/http.go

@@ -0,0 +1,45 @@
+package pkg
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+
+	"github.com/pkg/errors"
+)
+
+// nolint: noctx
+func GetHTTPResponse(url string, v interface{}) error {
+	res, err := http.Get(url)
+	if err != nil {
+		return errors.Wrap(err, "failed to make GET request")
+	}
+	defer res.Body.Close()
+
+	if res.StatusCode != 200 {
+		return errors.New("failed to obtain json")
+	}
+
+	body, err := ioutil.ReadAll(res.Body)
+	if err != nil {
+		return errors.Wrap(err, "failed to read bytes from body")
+	}
+
+	err = json.Unmarshal(body, v)
+	if err != nil {
+		return errors.Wrap(err, "failed to unmarshal json")
+	}
+
+	return nil
+}
+
+// nolint: noctx
+func GetHTTPResponseCode(url string) (int, error) {
+	res, err := http.Get(url)
+	if err != nil {
+		return 0, errors.Wrap(err, "failed to make GET request")
+	}
+	defer res.Body.Close()
+
+	return res.StatusCode, nil
+}

pkg/validation/address.go

@@ -116,3 +116,11 @@ func ValidateAddress(address string, prefix string, length int) error {
 
 	return nil
 }
+
+func IsEthereumAddress(addr string) bool {
+	if len(addr) == 40 || len(addr) == 42 && strings.HasPrefix(addr, "0x") {
+		return true
+	}
+
+	return false
+}

pkg/validation/info/external.go

@@ -0,0 +1,42 @@
+package info
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/trustwallet/assets-go-libs/pkg"
+)
+
+type ExternalTokenInfo struct {
+	Symbol       string `json:"symbol"`
+	Decimals     int    `json:"decimals"`
+	HoldersCount int    `json:"holdersCount"`
+}
+
+func GetExternalTokenInfo(tokenID, tokentType string) (*ExternalTokenInfo, error) {
+	switch strings.ToLower(tokentType) {
+	case "erc20":
+		return GetTokenInfoForERC20(tokenID)
+	case "bep20":
+		return GetTokenInfoForBEP20(tokenID)
+	}
+
+	return nil, nil
+}
+
+func GetTokenInfoForERC20(tokenID string) (*ExternalTokenInfo, error) {
+	url := fmt.Sprintf("https://api.ethplorer.io/getTokenInfo/%s?apiKey=freekey", tokenID)
+
+	var result ExternalTokenInfo
+	err := pkg.GetHTTPResponse(url, &result)
+	if err != nil {
+		return nil, err
+	}
+
+	return &result, nil
+}
+
+// TODO: Implement it.
+func GetTokenInfoForBEP20(tokenID string) (*ExternalTokenInfo, error) {
+	return nil, nil
+}

pkg/validation/info/fields_validators.go

@@ -243,9 +243,7 @@ func ValidateExplorer(explorer, name string, chain coin.Coin, addr string) error
 		}
 
 		if matchCount == 0 {
-			err := fmt.Errorf("invalid value for explorer field, %s insted of %s", explorerActual, explorerExpected)
-
-			return err
+			return fmt.Errorf("invalid value for explorer field, %s insted of %s", explorerActual, explorerExpected)
 		}
 	}