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utils.go
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/
utils.go
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package util
import (
"crypto/sha256"
"encoding/hex"
"encoding/json"
)
// concatenate n strings
// e.g. HashConcat("a", "b", "c") => "a:b:c"
func HashConcat(s ...string) string {
result := ""
for index, value := range s {
if index == 0 {
result = value
} else {
result = result + ":" + value
}
}
return result
}
func CalculateHash(input string) string {
hash := sha256.Sum256([]byte(input))
return hex.EncodeToString(hash[:])
}
// extract a single field from input json
func ExtractFieldFromJSON(jsonInput string, field string) (string, error) {
var input map[string]interface{}
err := json.Unmarshal([]byte(jsonInput), &input)
if err != nil {
// return "", errorcode.Internal.WithMessage("failed to parse signature json, %v", err).LogReturn()
return "", err
}
// try to extract the value
value, exists := input[field].(string)
if !exists {
// return "", errorcode.Internal.WithMessage("failed to parse signature json, missing field %s", field).LogReturn()
return "", err
}
return value, nil
}