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cli: move GetDataFromContext and ParseParams to a helpers package

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This commit is contained in:
Anna Shaleva 2021-04-21 13:14:55 +03:00
parent d12ae0998f
commit 94316fa36d
5 changed files with 393 additions and 388 deletions
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81
cli/cmdargs/parser.go
View file

@ -1,14 +1,25 @@
package cmdargs
import (
"errors"
"fmt"
"strings"
"github.com/nspcc-dev/neo-go/cli/flags"
"github.com/nspcc-dev/neo-go/pkg/core/transaction"
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
"github.com/urfave/cli"
)
const (
// CosignersSeparator marks the start of cosigners cli args.
CosignersSeparator = "--"
// ArrayStartSeparator marks the start of array cli arg.
ArrayStartSeparator = "["
// ArrayEndSeparator marks the end of array cli arg.
ArrayEndSeparator = "]"
)
// GetSignersFromContext returns signers parsed from context args starting
// from the specified offset.
func GetSignersFromContext(ctx *cli.Context, offset int) ([]transaction.Signer, *cli.ExitError) {
@ -47,3 +58,73 @@ func parseCosigner(c string) (transaction.Signer, error) {
}
return res, nil
}
// GetDataFromContext returns data parameter from context args.
func GetDataFromContext(ctx *cli.Context) (int, interface{}, *cli.ExitError) {
var (
data interface{}
offset int
params []smartcontract.Parameter
err error
)
args := ctx.Args()
if args.Present() {
offset, params, err = ParseParams(args, true)
if err != nil {
return offset, nil, cli.NewExitError(fmt.Errorf("unable to parse 'data' parameter: %w", err), 1)
}
if len(params) != 1 {
return offset, nil, cli.NewExitError("'data' should be represented as a single parameter", 1)
}
data, err = smartcontract.ExpandParameterToEmitable(params[0])
if err != nil {
return offset, nil, cli.NewExitError(fmt.Sprintf("failed to convert 'data' to emitable type: %s", err.Error()), 1)
}
}
return offset, data, nil
}
// ParseParams extracts array of smartcontract.Parameter from the given args and
// returns the number of handled words, the array itself and an error.
// `calledFromMain` denotes whether the method was called from the outside or
// recursively and used to check if CosignersSeparator and ArrayEndSeparator are
// allowed to be in `args` sequence.
func ParseParams(args []string, calledFromMain bool) (int, []smartcontract.Parameter, error) {
res := []smartcontract.Parameter{}
for k := 0; k < len(args); {
s := args[k]
switch s {
case CosignersSeparator:
if calledFromMain {
return k + 1, res, nil // `1` to convert index to numWordsRead
}
return 0, []smartcontract.Parameter{}, errors.New("invalid array syntax: missing closing bracket")
case ArrayStartSeparator:
numWordsRead, array, err := ParseParams(args[k+1:], false)
if err != nil {
return 0, nil, fmt.Errorf("failed to parse array: %w", err)
}
res = append(res, smartcontract.Parameter{
Type: smartcontract.ArrayType,
Value: array,
})
k += 1 + numWordsRead // `1` for opening bracket
case ArrayEndSeparator:
if calledFromMain {
return 0, nil, errors.New("invalid array syntax: missing opening bracket")
}
return k + 1, res, nil // `1`to convert index to numWordsRead
default:
param, err := smartcontract.NewParameterFromString(s)
if err != nil {
return 0, nil, fmt.Errorf("failed to parse argument #%d: %w", k+1, err)
}
res = append(res, *param)
k++
}
}
if calledFromMain {
return len(args), res, nil
}
return 0, []smartcontract.Parameter{}, errors.New("invalid array syntax: missing closing bracket")
}

308
cli/cmdargs/parser_test.go
View file

@ -1,9 +1,11 @@
package cmdargs
import (
"strings"
"testing"
"github.com/nspcc-dev/neo-go/pkg/core/transaction"
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/stretchr/testify/require"
)
@ -52,3 +54,309 @@ func TestParseCosigner(t *testing.T) {
require.Error(t, err)
}
}
func TestParseParams_CalledFromItself(t *testing.T) {
testCases := map[string]struct {
WordsRead int
Value []smartcontract.Parameter
}{
"]": {
WordsRead: 1,
Value: []smartcontract.Parameter{},
},
"[ [ ] ] ]": {
WordsRead: 5,
Value: []smartcontract.Parameter{
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{},
},
},
},
},
},
"a b c ]": {
WordsRead: 4,
Value: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "a",
},
{
Type: smartcontract.StringType,
Value: "b",
},
{
Type: smartcontract.StringType,
Value: "c",
},
},
},
"a [ b [ [ c d ] e ] ] f ] extra items": {
WordsRead: 13, // the method should return right after the last bracket, as calledFromMain == false
Value: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "a",
},
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "b",
},
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "c",
},
{
Type: smartcontract.StringType,
Value: "d",
},
},
},
{
Type: smartcontract.StringType,
Value: "e",
},
},
},
},
},
{
Type: smartcontract.StringType,
Value: "f",
},
},
},
}
for str, expected := range testCases {
input := strings.Split(str, " ")
offset, actual, err := ParseParams(input, false)
require.NoError(t, err)
require.Equal(t, expected.WordsRead, offset)
require.Equal(t, expected.Value, actual)
}
errorCases := []string{
"[ ]",
"[ a b [ c ] d ]",
"[ ] --",
"--",
"not-int:integer ]",
}
for _, str := range errorCases {
input := strings.Split(str, " ")
_, _, err := ParseParams(input, false)
require.Error(t, err)
}
}
func TestParseParams_CalledFromOutside(t *testing.T) {
testCases := map[string]struct {
WordsRead int
Parameters []smartcontract.Parameter
}{
"-- cosigner1": {
WordsRead: 1, // the `--` only
Parameters: []smartcontract.Parameter{},
},
"a b c": {
WordsRead: 3,
Parameters: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "a",
},
{
Type: smartcontract.StringType,
Value: "b",
},
{
Type: smartcontract.StringType,
Value: "c",
},
},
},
"a b c -- cosigner1": {
WordsRead: 4,
Parameters: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "a",
},
{
Type: smartcontract.StringType,
Value: "b",
},
{
Type: smartcontract.StringType,
Value: "c",
},
},
},
"a [ b [ [ c d ] e ] ] f": {
WordsRead: 12,
Parameters: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "a",
},
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "b",
},
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "c",
},
{
Type: smartcontract.StringType,
Value: "d",
},
},
},
{
Type: smartcontract.StringType,
Value: "e",
},
},
},
},
},
{
Type: smartcontract.StringType,
Value: "f",
},
},
},
"a [ b ] -- cosigner1 cosigner2": {
WordsRead: 5,
Parameters: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "a",
},
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "b",
},
},
},
},
},
"a [ b ]": {
WordsRead: 4,
Parameters: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "a",
},
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "b",
},
},
},
},
},
"a [ b ] [ [ c ] ] [ [ [ d ] ] ]": {
WordsRead: 16,
Parameters: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "a",
},
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "b",
},
},
},
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "c",
},
},
},
},
},
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "d",
},
},
},
},
},
},
},
},
},
}
for str, expected := range testCases {
input := strings.Split(str, " ")
offset, arr, err := ParseParams(input, true)
require.NoError(t, err)
require.Equal(t, expected.WordsRead, offset)
require.Equal(t, expected.Parameters, arr)
}
errorCases := []string{
"[",
"]",
"[ [ ]",
"[ [ ] --",
"[ -- ]",
}
for _, str := range errorCases {
input := strings.Split(str, " ")
_, _, err := ParseParams(input, true)
require.Error(t, err)
}
}

80
cli/smartcontract/smart_contract.go
View file

@ -87,11 +87,6 @@ func init() {
func RuntimeNotify(args []interface{}) {
runtime.Notify(notificationName, args)
}`
// cosignersSeparator is a special value which is used to distinguish
// parameters and cosigners for invoke* commands
cosignersSeparator = "--"
arrayStartSeparator = "["
arrayEndSeparator = "]"
)
// NewCommands returns 'contract' command.
@ -542,7 +537,7 @@ func invokeInternal(ctx *cli.Context, signAndPush bool) error {
paramsStart++
if len(args) > paramsStart {
cosignersOffset, params, err = ParseParams(args[paramsStart:], true)
cosignersOffset, params, err = cmdargs.ParseParams(args[paramsStart:], true)
if err != nil {
return cli.NewExitError(err, 1)
}
@ -622,52 +617,6 @@ func invokeInternal(ctx *cli.Context, signAndPush bool) error {
return nil
}
// ParseParams extracts array of smartcontract.Parameter from the given args and
// returns the number of handled words, the array itself and an error.
// `calledFromMain` denotes whether the method was called from the outside or
// recursively and used to check if cosignersSeparator and closing bracket are
// allowed to be in `args` sequence.
func ParseParams(args []string, calledFromMain bool) (int, []smartcontract.Parameter, error) {
res := []smartcontract.Parameter{}
for k := 0; k < len(args); {
s := args[k]
switch s {
case cosignersSeparator:
if calledFromMain {
return k + 1, res, nil // `1` to convert index to numWordsRead
}
return 0, []smartcontract.Parameter{}, errors.New("invalid array syntax: missing closing bracket")
case arrayStartSeparator:
numWordsRead, array, err := ParseParams(args[k+1:], false)
if err != nil {
return 0, nil, fmt.Errorf("failed to parse array: %w", err)
}
res = append(res, smartcontract.Parameter{
Type: smartcontract.ArrayType,
Value: array,
})
k += 1 + numWordsRead // `1` for opening bracket
case arrayEndSeparator:
if calledFromMain {
return 0, nil, errors.New("invalid array syntax: missing opening bracket")
}
return k + 1, res, nil // `1`to convert index to numWordsRead
default:
param, err := smartcontract.NewParameterFromString(s)
if err != nil {
return 0, nil, fmt.Errorf("failed to parse argument #%d: %w", k+1, err)
}
res = append(res, *param)
k++
}
}
if calledFromMain {
return len(args), res, nil
}
return 0, []smartcontract.Parameter{}, errors.New("invalid array syntax: missing closing bracket")
}
func testInvokeScript(ctx *cli.Context) error {
src := ctx.String("in")
if len(src) == 0 {
@ -828,7 +777,7 @@ func contractDeploy(ctx *cli.Context) error {
return cli.NewExitError(fmt.Errorf("failed to restore manifest file: %w", err), 1)
}
_, data, extErr := GetDataFromContext(ctx)
_, data, extErr := cmdargs.GetDataFromContext(ctx)
if extErr != nil {
return extErr
}
@ -888,31 +837,6 @@ func contractDeploy(ctx *cli.Context) error {
return nil
}
// GetDataFromContext returns data parameter from context args.
func GetDataFromContext(ctx *cli.Context) (int, interface{}, *cli.ExitError) {
var (
data interface{}
offset int
params []smartcontract.Parameter
err error
)
args := ctx.Args()
if args.Present() {
offset, params, err = ParseParams(args, true)
if err != nil {
return offset, nil, cli.NewExitError(fmt.Errorf("unable to parse 'data' parameter: %w", err), 1)
}
if len(params) != 1 {
return offset, nil, cli.NewExitError("'data' should be represented as a single parameter", 1)
}
data, err = smartcontract.ExpandParameterToEmitable(params[0])
if err != nil {
return offset, nil, cli.NewExitError(fmt.Sprintf("failed to convert 'data' to emitable type: %s", err.Error()), 1)
}
}
return offset, data, nil
}
// ParseContractConfig reads contract configuration file (.yaml) and returns unmarshalled ProjectConfig.
func ParseContractConfig(confFile string) (ProjectConfig, error) {
conf := ProjectConfig{}

308
cli/smartcontract/smart_contract_test.go
View file

@ -4,10 +4,8 @@ import (
"flag"
"io/ioutil"
"os"
"strings"
"testing"
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
"github.com/stretchr/testify/require"
"github.com/urfave/cli"
)
@ -66,309 +64,3 @@ events:
type: Array
`, string(manifest))
}
func TestParseParams_CalledFromItself(t *testing.T) {
testCases := map[string]struct {
WordsRead int
Value []smartcontract.Parameter
}{
"]": {
WordsRead: 1,
Value: []smartcontract.Parameter{},
},
"[ [ ] ] ]": {
WordsRead: 5,
Value: []smartcontract.Parameter{
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{},
},
},
},
},
},
"a b c ]": {
WordsRead: 4,
Value: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "a",
},
{
Type: smartcontract.StringType,
Value: "b",
},
{
Type: smartcontract.StringType,
Value: "c",
},
},
},
"a [ b [ [ c d ] e ] ] f ] extra items": {
WordsRead: 13, // the method should return right after the last bracket, as calledFromMain == false
Value: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "a",
},
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "b",
},
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "c",
},
{
Type: smartcontract.StringType,
Value: "d",
},
},
},
{
Type: smartcontract.StringType,
Value: "e",
},
},
},
},
},
{
Type: smartcontract.StringType,
Value: "f",
},
},
},
}
for str, expected := range testCases {
input := strings.Split(str, " ")
offset, actual, err := ParseParams(input, false)
require.NoError(t, err)
require.Equal(t, expected.WordsRead, offset)
require.Equal(t, expected.Value, actual)
}
errorCases := []string{
"[ ]",
"[ a b [ c ] d ]",
"[ ] --",
"--",
"not-int:integer ]",
}
for _, str := range errorCases {
input := strings.Split(str, " ")
_, _, err := ParseParams(input, false)
require.Error(t, err)
}
}
func TestParseParams_CalledFromOutside(t *testing.T) {
testCases := map[string]struct {
WordsRead int
Parameters []smartcontract.Parameter
}{
"-- cosigner1": {
WordsRead: 1, // the `--` only
Parameters: []smartcontract.Parameter{},
},
"a b c": {
WordsRead: 3,
Parameters: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "a",
},
{
Type: smartcontract.StringType,
Value: "b",
},
{
Type: smartcontract.StringType,
Value: "c",
},
},
},
"a b c -- cosigner1": {
WordsRead: 4,
Parameters: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "a",
},
{
Type: smartcontract.StringType,
Value: "b",
},
{
Type: smartcontract.StringType,
Value: "c",
},
},
},
"a [ b [ [ c d ] e ] ] f": {
WordsRead: 12,
Parameters: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "a",
},
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "b",
},
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "c",
},
{
Type: smartcontract.StringType,
Value: "d",
},
},
},
{
Type: smartcontract.StringType,
Value: "e",
},
},
},
},
},
{
Type: smartcontract.StringType,
Value: "f",
},
},
},
"a [ b ] -- cosigner1 cosigner2": {
WordsRead: 5,
Parameters: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "a",
},
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "b",
},
},
},
},
},
"a [ b ]": {
WordsRead: 4,
Parameters: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "a",
},
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "b",
},
},
},
},
},
"a [ b ] [ [ c ] ] [ [ [ d ] ] ]": {
WordsRead: 16,
Parameters: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "a",
},
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "b",
},
},
},
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "c",
},
},
},
},
},
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.ArrayType,
Value: []smartcontract.Parameter{
{
Type: smartcontract.StringType,
Value: "d",
},
},
},
},
},
},
},
},
},
}
for str, expected := range testCases {
input := strings.Split(str, " ")
offset, arr, err := ParseParams(input, true)
require.NoError(t, err)
require.Equal(t, expected.WordsRead, offset)
require.Equal(t, expected.Parameters, arr)
}
errorCases := []string{
"[",
"]",
"[ [ ]",
"[ [ ] --",
"[ -- ]",
}
for _, str := range errorCases {
input := strings.Split(str, " ")
_, _, err := ParseParams(input, true)
require.Error(t, err)
}
}

4
cli/wallet/nep17.go
View file

@ -6,10 +6,10 @@ import (
"math/big"
"strings"
"github.com/nspcc-dev/neo-go/cli/cmdargs"
"github.com/nspcc-dev/neo-go/cli/flags"
"github.com/nspcc-dev/neo-go/cli/options"
"github.com/nspcc-dev/neo-go/cli/paramcontext"
smartcontractcli "github.com/nspcc-dev/neo-go/cli/smartcontract"
"github.com/nspcc-dev/neo-go/pkg/encoding/address"
"github.com/nspcc-dev/neo-go/pkg/encoding/fixedn"
"github.com/nspcc-dev/neo-go/pkg/rpc/client"
@ -461,7 +461,7 @@ func transferNEP17(ctx *cli.Context) error {
return cli.NewExitError(fmt.Errorf("invalid amount: %w", err), 1)
}
_, data, extErr := smartcontractcli.GetDataFromContext(ctx)
_, data, extErr := cmdargs.GetDataFromContext(ctx)
if extErr != nil {
return extErr
}