109 lines
3.1 KiB
Go
109 lines
3.1 KiB
Go
package client
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import (
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"fmt"
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"math/big"
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"github.com/nspcc-dev/neo-go/pkg/core/transaction"
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"github.com/nspcc-dev/neo-go/pkg/neorpc/result"
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"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
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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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// BoolFromStackItem receives boolean value from the value of a smart contract parameter.
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func BoolFromStackItem(param stackitem.Item) (bool, error) {
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switch param.Type() {
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case stackitem.BooleanT, stackitem.IntegerT, stackitem.ByteArrayT:
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return param.TryBool()
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default:
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return false, fmt.Errorf("chain/client: %s is not a bool type", param.Type())
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}
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}
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// IntFromStackItem receives numerical value from the value of a smart contract parameter.
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func IntFromStackItem(param stackitem.Item) (int64, error) {
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switch param.Type() {
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case stackitem.IntegerT, stackitem.ByteArrayT:
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i, err := param.TryInteger()
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if err != nil {
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return 0, err
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}
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return i.Int64(), nil
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default:
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return 0, fmt.Errorf("chain/client: %s is not an integer type", param.Type())
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}
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}
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// BigIntFromStackItem receives numerical value from the value of a smart contract parameter.
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func BigIntFromStackItem(param stackitem.Item) (*big.Int, error) {
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return param.TryInteger()
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}
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// BytesFromStackItem receives binary value from the value of a smart contract parameter.
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func BytesFromStackItem(param stackitem.Item) ([]byte, error) {
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switch param.Type() {
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case stackitem.BufferT, stackitem.ByteArrayT:
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return param.TryBytes()
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case stackitem.IntegerT:
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n, err := param.TryInteger()
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if err != nil {
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return nil, fmt.Errorf("can't parse integer bytes: %w", err)
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}
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return n.Bytes(), nil
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case stackitem.AnyT:
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if param.Value() == nil {
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return nil, nil
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}
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fallthrough
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default:
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return nil, fmt.Errorf("chain/client: %s is not a byte array type", param.Type())
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}
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}
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// ArrayFromStackItem 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 ArrayFromStackItem(param stackitem.Item) ([]stackitem.Item, error) {
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switch param.Type() {
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case stackitem.AnyT:
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return nil, nil
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case stackitem.ArrayT, stackitem.StructT:
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items, ok := param.Value().([]stackitem.Item)
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if !ok {
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return nil, fmt.Errorf("chain/client: can't convert %T to parameter slice", param.Value())
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}
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return items, nil
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default:
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return nil, fmt.Errorf("chain/client: %s is not an array type", param.Type())
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}
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}
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// StringFromStackItem receives string value from the value of a smart contract parameter.
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func StringFromStackItem(param stackitem.Item) (string, error) {
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if param.Type() != stackitem.ByteArrayT {
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return "", fmt.Errorf("chain/client: %s is not an string type", param.Type())
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}
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return stackitem.ToString(param)
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}
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func addFeeCheckerModifier(add int64) func(r *result.Invoke, t *transaction.Transaction) error {
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return func(r *result.Invoke, t *transaction.Transaction) error {
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if r.State != HaltState {
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return wrapFrostFSError(¬HaltStateError{state: r.State, exception: r.FaultException})
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}
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t.SystemFee += add
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return nil
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}
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}
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