// checkDecodeFromJSON decodes from s guided by exp. exp drives the
// Stream by invoking decoding operations (Uint, Big, List, ...) based
// on the type of each value. The value decoded from the RLP stream
// must match the JSON value.
func checkDecodeFromJSON(s *rlp.Stream, exp interface{}) error {
	switch exp := exp.(type) {
	case uint64:
		i, err := s.Uint()
		if err != nil {
			return addStack("Uint", exp, err)
		}
		if i != exp {
			return addStack("Uint", exp, fmt.Errorf("result mismatch: got %d", i))
		}
	case *big.Int:
		big := new(big.Int)
		if err := s.Decode(&big); err != nil {
			return addStack("Big", exp, err)
		}
		if big.Cmp(exp) != 0 {
			return addStack("Big", exp, fmt.Errorf("result mismatch: got %d", big))
		}
	case []byte:
		b, err := s.Bytes()
		if err != nil {
			return addStack("Bytes", exp, err)
		}
		if !bytes.Equal(b, exp) {
			return addStack("Bytes", exp, fmt.Errorf("result mismatch: got %x", b))
		}
	case []interface{}:
		if _, err := s.List(); err != nil {
			return addStack("List", exp, err)
		}
		for i, v := range exp {
			if err := checkDecodeFromJSON(s, v); err != nil {
				return addStack(fmt.Sprintf("[%d]", i), exp, err)
			}
		}
		if err := s.ListEnd(); err != nil {
			return addStack("ListEnd", exp, err)
		}
	default:
		panic(fmt.Errorf("unhandled type: %T", exp))
	}
	return nil
}
Exemple #2
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func dump(s *rlp.Stream, depth int) error {
	kind, size, err := s.Kind()
	if err != nil {
		return err
	}
	switch kind {
	case rlp.Byte, rlp.String:
		str, err := s.Bytes()
		if err != nil {
			return err
		}
		if len(str) == 0 || !*noASCII && isASCII(str) {
			fmt.Printf("%s%q", ws(depth), str)
		} else {
			fmt.Printf("%s%x", ws(depth), str)
		}
	case rlp.List:
		s.List()
		defer s.ListEnd()
		if size == 0 {
			fmt.Print(ws(depth) + "[]")
		} else {
			fmt.Println(ws(depth) + "[")
			for i := 0; ; i++ {
				if i > 0 {
					fmt.Print(",\n")
				}
				if err := dump(s, depth+1); err == rlp.EOL {
					break
				} else if err != nil {
					return err
				}
			}
			fmt.Print(ws(depth) + "]")
		}
	}
	return nil
}