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cli: implement conversion helpers #1227

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merged 2 commits into from
Jul 27, 2020
Merged

cli: implement conversion helpers #1227

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b3e166a
vmcli: remove unused method
fyrchik Jul 23, 2020
5fe8095
vmcli: implement parse command
fyrchik Jul 23, 2020
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63 changes: 61 additions & 2 deletions pkg/vm/cli/cli.go
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Original file line number Diff line number Diff line change
Expand Up @@ -11,8 +11,12 @@ import (
"os"
"strconv"
"strings"
"text/tabwriter"

"github.com/nspcc-dev/neo-go/pkg/compiler"
"github.com/nspcc-dev/neo-go/pkg/encoding/address"
"github.com/nspcc-dev/neo-go/pkg/encoding/bigint"
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/nspcc-dev/neo-go/pkg/vm"
"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
"gopkg.in/abiosoft/ishell.v2"
Expand Down Expand Up @@ -98,6 +102,15 @@ var commands = []*ishell.Cmd{
> loadgo /path/to/file.go`,
Func: handleLoadGo,
},
{
Name: "parse",
Help: "Parse provided argument and convert it into other possible formats",
LongHelp: `Usage: parse <arg>

<arg> is an argument which is tried to be interpreted as an item of different types
and converted to other formats. Strings are escaped and output in quotes.`,
Func: handleParse,
},
{
Name: "run",
Help: "Execute the current loaded script",
Expand Down Expand Up @@ -440,8 +453,54 @@ func (c *VMCLI) Run() error {
return nil
}

func isMethodArg(s string) bool {
return len(strings.Split(s, ":")) == 1
func handleParse(c *ishell.Context) {
if len(c.Args) < 1 {
c.Err(errors.New("missing argument"))
return
}
arg := c.Args[0]
buf := bytes.NewBuffer(nil)
if val, err := strconv.ParseInt(arg, 10, 64); err == nil {
bs := bigint.ToBytes(big.NewInt(val))
buf.WriteString(fmt.Sprintf("Integer to Hex\t%s\n", hex.EncodeToString(bs)))
buf.WriteString(fmt.Sprintf("Integer to Base64\t%s\n", base64.StdEncoding.EncodeToString(bs)))
}
noX := strings.TrimPrefix(arg, "0x")
if rawStr, err := hex.DecodeString(noX); err == nil {
if val, err := util.Uint160DecodeBytesBE(rawStr); err == nil {
buf.WriteString(fmt.Sprintf("BE ScriptHash to Address\t%s\n", address.Uint160ToString(val)))
buf.WriteString(fmt.Sprintf("LE ScriptHash to Address\t%s\n", address.Uint160ToString(val.Reverse())))
}
buf.WriteString(fmt.Sprintf("Hex to String\t%s\n", fmt.Sprintf("%q", string(rawStr))))
buf.WriteString(fmt.Sprintf("Hex to Integer\t%s\n", bigint.FromBytes(rawStr)))
buf.WriteString(fmt.Sprintf("Swap Endianness\t%s\n", hex.EncodeToString(util.ArrayReverse(rawStr))))
}
if addr, err := address.StringToUint160(arg); err == nil {
buf.WriteString(fmt.Sprintf("Address to BE ScriptHash\t%s\n", addr))
buf.WriteString(fmt.Sprintf("Address to LE ScriptHash\t%s\n", addr.Reverse()))
buf.WriteString(fmt.Sprintf("Address to Base64 (BE)\t%s\n", base64.StdEncoding.EncodeToString(addr.BytesBE())))
buf.WriteString(fmt.Sprintf("Address to Base64 (LE)\t%s\n", base64.StdEncoding.EncodeToString(addr.BytesLE())))
}
if rawStr, err := base64.StdEncoding.DecodeString(arg); err == nil {
buf.WriteString(fmt.Sprintf("Base64 to String\t%s\n", fmt.Sprintf("%q", string(rawStr))))
buf.WriteString(fmt.Sprintf("Base64 to BigInteger\t%s\n", bigint.FromBytes(rawStr)))
}

buf.WriteString(fmt.Sprintf("String to Hex\t%s\n", hex.EncodeToString([]byte(arg))))
buf.WriteString(fmt.Sprintf("String to Base64\t%s\n", base64.StdEncoding.EncodeToString([]byte(arg))))

out := buf.Bytes()
buf = bytes.NewBuffer(nil)
w := tabwriter.NewWriter(buf, 0, 0, 4, ' ', 0)
if _, err := w.Write(out); err != nil {
c.Err(err)
return
}
if err := w.Flush(); err != nil {
c.Err(err)
return
}
c.Print(string(buf.Bytes()))
}

func parseArgs(args []string) ([]stackitem.Item, error) {
Expand Down