mirror of
https://github.com/nspcc-dev/neo-go.git
synced 2024-11-30 09:33:36 +00:00
122 lines
3.2 KiB
Go
122 lines
3.2 KiB
Go
package request
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
|
|
"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
|
|
"github.com/nspcc-dev/neo-go/pkg/io"
|
|
"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"
|
|
)
|
|
|
|
// ExpandArrayIntoScript pushes all FuncParam parameters from the given array
|
|
// into the given buffer in the reverse order.
|
|
func ExpandArrayIntoScript(script *io.BinWriter, slice []Param) error {
|
|
for j := len(slice) - 1; j >= 0; j-- {
|
|
fp, err := slice[j].GetFuncParam()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
switch fp.Type {
|
|
case smartcontract.ByteArrayType:
|
|
str, err := fp.Value.GetBytesBase64()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
emit.Bytes(script, str)
|
|
case smartcontract.SignatureType:
|
|
str, err := fp.Value.GetBytesHex()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
emit.Bytes(script, str)
|
|
case smartcontract.StringType:
|
|
str, err := fp.Value.GetString()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
emit.String(script, str)
|
|
case smartcontract.Hash160Type:
|
|
hash, err := fp.Value.GetUint160FromHex()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
emit.Bytes(script, hash.BytesBE())
|
|
case smartcontract.Hash256Type:
|
|
hash, err := fp.Value.GetUint256()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
emit.Bytes(script, hash.BytesBE())
|
|
case smartcontract.PublicKeyType:
|
|
str, err := fp.Value.GetString()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
key, err := keys.NewPublicKeyFromString(string(str))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
emit.Bytes(script, key.Bytes())
|
|
case smartcontract.IntegerType:
|
|
bi, err := fp.Value.GetBigInt()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
emit.BigInt(script, bi)
|
|
case smartcontract.BoolType:
|
|
val, err := fp.Value.GetBoolean() // not GetBooleanStrict(), because that's the way C# code works
|
|
if err != nil {
|
|
return errors.New("not a bool")
|
|
}
|
|
if val {
|
|
emit.Int(script, 1)
|
|
} else {
|
|
emit.Int(script, 0)
|
|
}
|
|
case smartcontract.ArrayType:
|
|
val, err := fp.Value.GetArray()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
err = ExpandArrayIntoScript(script, val)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
emit.Int(script, int64(len(val)))
|
|
emit.Opcodes(script, opcode.PACK)
|
|
case smartcontract.AnyType:
|
|
if fp.Value.IsNull() {
|
|
emit.Opcodes(script, opcode.PUSHNULL)
|
|
}
|
|
default:
|
|
return fmt.Errorf("parameter type %v is not supported", fp.Type)
|
|
}
|
|
}
|
|
return script.Err
|
|
}
|
|
|
|
// CreateFunctionInvocationScript creates a script to invoke the given contract with
|
|
// the given parameters.
|
|
func CreateFunctionInvocationScript(contract util.Uint160, method string, param *Param) ([]byte, error) {
|
|
script := io.NewBufBinWriter()
|
|
if param == nil {
|
|
emit.Opcodes(script.BinWriter, opcode.NEWARRAY0)
|
|
} else if slice, err := param.GetArray(); err == nil {
|
|
err = ExpandArrayIntoScript(script.BinWriter, slice)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
emit.Int(script.BinWriter, int64(len(slice)))
|
|
emit.Opcodes(script.BinWriter, opcode.PACK)
|
|
} else {
|
|
return nil, fmt.Errorf("failed to convert %s to script parameter", param)
|
|
}
|
|
|
|
emit.AppCallNoArgs(script.BinWriter, contract, method, callflag.All)
|
|
return script.Bytes(), nil
|
|
}
|