347f7ed576
Some of them are shared between multiple RPC client APIs, so let's keep them in a separate place for better maintainability.
77 lines
2.1 KiB
Go
77 lines
2.1 KiB
Go
package client
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import (
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"crypto/elliptic"
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"errors"
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"fmt"
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"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
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"github.com/nspcc-dev/neo-go/pkg/rpc/response/result"
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"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
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)
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// getInvocationError returns an error in case of bad VM state or empty stack.
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func getInvocationError(result *result.Invoke) error {
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if result.State != "HALT" {
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return fmt.Errorf("invocation failed: %s", result.FaultException)
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}
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if len(result.Stack) == 0 {
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return errors.New("result stack is empty")
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}
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return nil
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}
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// topBoolFromStack returns the top boolean value from stack.
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func topBoolFromStack(st []stackitem.Item) (bool, error) {
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index := len(st) - 1 // top stack element is last in the array
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result, ok := st[index].Value().(bool)
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if !ok {
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return false, fmt.Errorf("invalid stack item type: %s", st[index].Type())
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}
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return result, nil
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}
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// topIntFromStack returns the top integer value from stack.
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func topIntFromStack(st []stackitem.Item) (int64, error) {
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index := len(st) - 1 // top stack element is last in the array
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bi, err := st[index].TryInteger()
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if err != nil {
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return 0, err
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}
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return bi.Int64(), nil
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}
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// topPublicKeysFromStack returns the top array of public keys from stack.
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func topPublicKeysFromStack(st []stackitem.Item) (keys.PublicKeys, error) {
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index := len(st) - 1 // top stack element is last in the array
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var (
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pks keys.PublicKeys
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err error
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)
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items, ok := st[index].Value().([]stackitem.Item)
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if !ok {
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return nil, fmt.Errorf("invalid stack item type: %s", st[index].Type())
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}
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pks = make(keys.PublicKeys, len(items))
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for i, item := range items {
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val, ok := item.Value().([]byte)
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if !ok {
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return nil, fmt.Errorf("invalid array element #%d: %s", i, item.Type())
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}
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pks[i], err = keys.NewPublicKeyFromBytes(val, elliptic.P256())
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if err != nil {
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return nil, err
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}
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}
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return pks, nil
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}
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// top string from stack returns the top string from stack.
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func topStringFromStack(st []stackitem.Item) (string, error) {
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index := len(st) - 1 // top stack element is last in the array
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bs, err := st[index].TryBytes()
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if err != nil {
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return "", err
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}
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return string(bs), nil
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}
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