225 lines
7 KiB
Go
225 lines
7 KiB
Go
package cmdargs
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import (
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"errors"
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"fmt"
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"strings"
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"github.com/nspcc-dev/neo-go/cli/flags"
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"github.com/nspcc-dev/neo-go/pkg/core/transaction"
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"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
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"github.com/nspcc-dev/neo-go/pkg/encoding/address"
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"github.com/nspcc-dev/neo-go/pkg/rpcclient/actor"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract"
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"github.com/nspcc-dev/neo-go/pkg/wallet"
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"github.com/urfave/cli"
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)
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const (
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// CosignersSeparator marks the start of cosigners cli args.
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CosignersSeparator = "--"
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// ArrayStartSeparator marks the start of array cli arg.
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ArrayStartSeparator = "["
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// ArrayEndSeparator marks the end of array cli arg.
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ArrayEndSeparator = "]"
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)
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// GetSignersFromContext returns signers parsed from context args starting
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// from the specified offset.
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func GetSignersFromContext(ctx *cli.Context, offset int) ([]transaction.Signer, *cli.ExitError) {
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args := ctx.Args()
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var signers []transaction.Signer
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if args.Present() && len(args) > offset {
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for i, c := range args[offset:] {
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cosigner, err := parseCosigner(c)
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if err != nil {
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return nil, cli.NewExitError(fmt.Errorf("failed to parse signer #%d: %w", i, err), 1)
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}
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signers = append(signers, cosigner)
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}
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}
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return signers, nil
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}
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func parseCosigner(c string) (transaction.Signer, error) {
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var (
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err error
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res = transaction.Signer{
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Scopes: transaction.CalledByEntry,
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}
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)
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data := strings.SplitN(c, ":", 2)
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s := data[0]
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res.Account, err = flags.ParseAddress(s)
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if err != nil {
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return res, err
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}
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if len(data) == 1 {
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return res, nil
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}
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res.Scopes = 0
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scopes := strings.Split(data[1], ",")
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for _, s := range scopes {
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sub := strings.Split(s, ":")
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scope, err := transaction.ScopesFromString(sub[0])
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if err != nil {
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return transaction.Signer{}, err
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}
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if scope == transaction.Global && res.Scopes&^transaction.Global != 0 ||
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scope != transaction.Global && res.Scopes&transaction.Global != 0 {
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return transaction.Signer{}, errors.New("Global scope can not be combined with other scopes")
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}
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res.Scopes |= scope
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switch scope {
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case transaction.CustomContracts:
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if len(sub) == 1 {
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return transaction.Signer{}, errors.New("CustomContracts scope must refer to at least one contract")
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}
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for _, s := range sub[1:] {
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addr, err := flags.ParseAddress(s)
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if err != nil {
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return transaction.Signer{}, err
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}
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res.AllowedContracts = append(res.AllowedContracts, addr)
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}
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case transaction.CustomGroups:
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if len(sub) == 1 {
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return transaction.Signer{}, errors.New("CustomGroups scope must refer to at least one group")
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}
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for _, s := range sub[1:] {
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pub, err := keys.NewPublicKeyFromString(s)
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if err != nil {
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return transaction.Signer{}, err
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}
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res.AllowedGroups = append(res.AllowedGroups, pub)
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}
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}
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}
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return res, nil
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}
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// GetDataFromContext returns data parameter from context args.
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func GetDataFromContext(ctx *cli.Context) (int, interface{}, *cli.ExitError) {
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var (
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data interface{}
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offset int
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params []smartcontract.Parameter
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err error
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)
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args := ctx.Args()
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if args.Present() {
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offset, params, err = ParseParams(args, true)
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if err != nil {
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return offset, nil, cli.NewExitError(fmt.Errorf("unable to parse 'data' parameter: %w", err), 1)
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}
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if len(params) > 1 {
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return offset, nil, cli.NewExitError("'data' should be represented as a single parameter", 1)
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}
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if len(params) != 0 {
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data, err = smartcontract.ExpandParameterToEmitable(params[0])
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if err != nil {
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return offset, nil, cli.NewExitError(fmt.Sprintf("failed to convert 'data' to emitable type: %s", err.Error()), 1)
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}
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}
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}
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return offset, data, nil
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}
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// EnsureNone returns an error if there are any positional arguments present.
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// It can be used to check for them in commands that don't accept arguments.
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func EnsureNone(ctx *cli.Context) *cli.ExitError {
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if ctx.Args().Present() {
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return cli.NewExitError("additional arguments given while this command expects none", 1)
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}
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return nil
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}
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// ParseParams extracts array of smartcontract.Parameter from the given args and
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// returns the number of handled words, the array itself and an error.
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// `calledFromMain` denotes whether the method was called from the outside or
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// recursively and used to check if CosignersSeparator and ArrayEndSeparator are
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// allowed to be in `args` sequence.
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func ParseParams(args []string, calledFromMain bool) (int, []smartcontract.Parameter, error) {
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res := []smartcontract.Parameter{}
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for k := 0; k < len(args); {
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s := args[k]
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switch s {
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case CosignersSeparator:
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if calledFromMain {
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return k + 1, res, nil // `1` to convert index to numWordsRead
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}
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return 0, []smartcontract.Parameter{}, errors.New("invalid array syntax: missing closing bracket")
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case ArrayStartSeparator:
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numWordsRead, array, err := ParseParams(args[k+1:], false)
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if err != nil {
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return 0, nil, fmt.Errorf("failed to parse array: %w", err)
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}
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res = append(res, smartcontract.Parameter{
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Type: smartcontract.ArrayType,
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Value: array,
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})
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k += 1 + numWordsRead // `1` for opening bracket
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case ArrayEndSeparator:
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if calledFromMain {
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return 0, nil, errors.New("invalid array syntax: missing opening bracket")
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}
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return k + 1, res, nil // `1`to convert index to numWordsRead
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default:
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param, err := smartcontract.NewParameterFromString(s)
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if err != nil {
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// '--' argument is skipped by urfave/cli library, which leads
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// to [--, addr:scope] being transformed to [addr:scope] and
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// interpreted as a parameter if other positional arguments are not present.
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// Here we fallback to parsing cosigners in this specific case to
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// create a better user experience ('-- addr:scope' vs '-- -- addr:scope').
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if k == 0 {
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if _, err := parseCosigner(s); err == nil {
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return 0, nil, nil
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}
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}
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return 0, nil, fmt.Errorf("failed to parse argument #%d: %w", k+1, err)
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}
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res = append(res, *param)
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k++
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}
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}
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if calledFromMain {
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return len(args), res, nil
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}
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return 0, []smartcontract.Parameter{}, errors.New("invalid array syntax: missing closing bracket")
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}
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// GetSignersAccounts returns the list of signers combined with the corresponding
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// accounts from the provided wallet.
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func GetSignersAccounts(senderAcc *wallet.Account, wall *wallet.Wallet, signers []transaction.Signer, accScope transaction.WitnessScope) ([]actor.SignerAccount, error) {
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signersAccounts := make([]actor.SignerAccount, 0, len(signers)+1)
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sender := senderAcc.ScriptHash()
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signersAccounts = append(signersAccounts, actor.SignerAccount{
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Signer: transaction.Signer{
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Account: sender,
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Scopes: accScope,
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},
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Account: senderAcc,
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})
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for i, s := range signers {
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if s.Account == sender {
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signersAccounts[0].Signer = s
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continue
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}
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signerAcc := wall.GetAccount(s.Account)
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if signerAcc == nil {
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return nil, fmt.Errorf("no account was found in the wallet for signer #%d (%s)", i, address.Uint160ToString(s.Account))
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}
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signersAccounts = append(signersAccounts, actor.SignerAccount{
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Signer: s,
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Account: signerAcc,
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})
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}
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return signersAccounts, nil
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}
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