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rpc: move all top*FromStack client functions to a separate file

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Some of them are shared between multiple RPC client APIs, so let's keep
them in a separate place for better maintainability.
This commit is contained in:
Anna Shaleva 2021-03-23 22:50:15 +03:00
parent 30e7d9a8b0
commit 347f7ed576
4 changed files with 77 additions and 70 deletions
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77
pkg/rpc/client/helper.go Normal file
View file

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

27
pkg/rpc/client/native.go
View file

@ -3,14 +3,12 @@ package client
// Various non-policy things from native contracts.
import (
"crypto/elliptic"
"fmt"
"github.com/nspcc-dev/neo-go/pkg/core/native/nativenames"
"github.com/nspcc-dev/neo-go/pkg/core/native/noderoles"
"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
)
// GetOraclePrice invokes `getPrice` method on a native Oracle contract.
@ -65,28 +63,3 @@ func (c *Client) GetDesignatedByRole(role noderoles.Role, index uint32) (keys.Pu
}
return topPublicKeysFromStack(result.Stack)
}
// topPublicKeysFromStack returns the top array of public keys from stack.
func topPublicKeysFromStack(st []stackitem.Item) (keys.PublicKeys, error) {
index := len(st) - 1 // top stack element is last in the array
var (
pks keys.PublicKeys
err error
)
items, ok := st[index].Value().([]stackitem.Item)
if !ok {
return nil, fmt.Errorf("invalid stack item type: %s", st[index].Type())
}
pks = make(keys.PublicKeys, len(items))
for i, item := range items {
val, ok := item.Value().([]byte)
if !ok {
return nil, fmt.Errorf("invalid array element #%d: %s", i, item.Type())
}
pks[i], err = keys.NewPublicKeyFromBytes(val, elliptic.P256())
if err != nil {
return nil, err
}
}
return pks, nil
}

32
pkg/rpc/client/nep17.go
View file

@ -1,19 +1,16 @@
package client
import (
"errors"
"fmt"
"github.com/nspcc-dev/neo-go/pkg/core/transaction"
"github.com/nspcc-dev/neo-go/pkg/encoding/address"
"github.com/nspcc-dev/neo-go/pkg/io"
"github.com/nspcc-dev/neo-go/pkg/rpc/response/result"
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
"github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag"
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/nspcc-dev/neo-go/pkg/vm/emit"
"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
"github.com/nspcc-dev/neo-go/pkg/wallet"
)
@ -221,32 +218,3 @@ func (c *Client) MultiTransferNEP17(acc *wallet.Account, gas int64, recipients [
return c.SendRawTransaction(tx)
}
func topIntFromStack(st []stackitem.Item) (int64, error) {
index := len(st) - 1 // top stack element is last in the array
bi, err := st[index].TryInteger()
if err != nil {
return 0, err
}
return bi.Int64(), nil
}
func topStringFromStack(st []stackitem.Item) (string, error) {
index := len(st) - 1 // top stack element is last in the array
bs, err := st[index].TryBytes()
if err != nil {
return "", err
}
return string(bs), nil
}
// getInvocationError returns an error in case of bad VM state or empty stack.
func getInvocationError(result *result.Invoke) error {
if result.State != "HALT" {
return fmt.Errorf("invocation failed: %s", result.FaultException)
}
if len(result.Stack) == 0 {
return errors.New("result stack is empty")
}
return nil
}

11
pkg/rpc/client/policy.go
View file

@ -6,7 +6,6 @@ import (
"github.com/nspcc-dev/neo-go/pkg/core/native/nativenames"
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
)
// GetFeePerByte invokes `getFeePerByte` method on a native Policy contract.
@ -80,13 +79,3 @@ func (c *Client) IsBlocked(hash util.Uint160) (bool, error) {
}
return topBoolFromStack(result.Stack)
}
// topBoolFromStack returns the top boolean value from stack
func topBoolFromStack(st []stackitem.Item) (bool, error) {
index := len(st) - 1 // top stack element is last in the array
result, ok := st[index].Value().(bool)
if !ok {
return false, fmt.Errorf("invalid stack item type: %s", st[index].Type())
}
return result, nil
}