forked from TrueCloudLab/frostfs-node
132 lines
3.6 KiB
Go
132 lines
3.6 KiB
Go
package client
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import (
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"encoding/binary"
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sc "github.com/nspcc-dev/neo-go/pkg/smartcontract"
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"github.com/pkg/errors"
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)
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/*
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Use these function to parse stack parameters obtained from `TestInvoke`
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function to native go types. You should know upfront return types of invoked
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method.
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*/
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// BoolFromStackParameter receives boolean value from the value of a smart contract parameter.
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func BoolFromStackParameter(param sc.Parameter) (bool, error) {
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switch param.Type {
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case sc.BoolType:
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val, ok := param.Value.(bool)
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if !ok {
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return false, errors.Errorf("chain/client: can't convert %T to boolean", param.Value)
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}
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return val, nil
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case sc.IntegerType:
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val, ok := param.Value.(int64)
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if !ok {
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return false, errors.Errorf("chain/client: can't convert %T to boolean", param.Value)
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}
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return val > 0, nil
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case sc.ByteArrayType:
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val, ok := param.Value.([]byte)
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if !ok {
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return false, errors.Errorf("chain/client: can't convert %T to boolean", param.Value)
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}
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return len(val) != 0, nil
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default:
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return false, errors.Errorf("chain/client: %s is not a bool type", param.Type)
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}
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}
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// IntFromStackParameter receives numerical value from the value of a smart contract parameter.
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func IntFromStackParameter(param sc.Parameter) (int64, error) {
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switch param.Type {
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case sc.IntegerType:
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val, ok := param.Value.(int64)
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if !ok {
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return 0, errors.Errorf("chain/client: can't convert %T to integer", param.Value)
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}
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return val, nil
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case sc.ByteArrayType:
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val, ok := param.Value.([]byte)
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if !ok || len(val) > 8 {
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return 0, errors.Errorf("chain/client: can't convert %T to integer", param.Value)
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}
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res := make([]byte, 8)
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copy(res[:len(val)], val)
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return int64(binary.LittleEndian.Uint64(res)), nil
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default:
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return 0, errors.Errorf("chain/client: %s is not an integer type", param.Type)
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}
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}
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// BytesFromStackParameter receives binary value from the value of a smart contract parameter.
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func BytesFromStackParameter(param sc.Parameter) ([]byte, error) {
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if param.Type != sc.ByteArrayType {
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if param.Type == sc.AnyType && param.Value == nil {
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return nil, nil
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}
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return nil, errors.Errorf("chain/client: %s is not a byte array type", param.Type)
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}
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val, ok := param.Value.([]byte)
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if !ok {
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return nil, errors.Errorf("chain/client: can't convert %T to byte slice", param.Value)
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}
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return val, nil
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}
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// ArrayFromStackParameter returns the slice contract parameters from passed parameter.
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//
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// If passed parameter carries boolean false value, (nil, nil) returns.
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func ArrayFromStackParameter(param sc.Parameter) ([]sc.Parameter, error) {
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if param.Type == sc.BoolType && !param.Value.(bool) {
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return nil, nil
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}
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if param.Type != sc.ArrayType {
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if param.Type == sc.AnyType && param.Value == nil {
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return nil, nil
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}
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return nil, errors.Errorf("chain/client: %s is not an array type", param.Type)
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}
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val, ok := param.Value.([]sc.Parameter)
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if !ok {
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return nil, errors.Errorf("chain/client: can't convert %T to parameter slice", param.Value)
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}
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return val, nil
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}
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// StringFromStackParameter receives string value from the value of a smart contract parameter.
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func StringFromStackParameter(param sc.Parameter) (string, error) {
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switch param.Type {
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case sc.StringType:
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val, ok := param.Value.(string)
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if !ok {
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return "", errors.Errorf("chain/client: can't convert %T to string", param.Value)
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}
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return val, nil
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case sc.ByteArrayType:
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val, ok := param.Value.([]byte)
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if !ok {
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return "", errors.Errorf("chain/client: can't convert %T to string", param.Value)
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}
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return string(val), nil
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default:
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return "", errors.Errorf("chain/client: %s is not a string type", param.Type)
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}
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}
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