mirror of
https://github.com/nspcc-dev/neo-go.git
synced 2024-11-27 03:58:06 +00:00
1c0c331e25
1. Remove `System.Contract.CallEx`. 2. Extend number of parameters. 3. Add return value count to `VM.Context`.
133 lines
3.3 KiB
Go
133 lines
3.3 KiB
Go
package request
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import (
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"errors"
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"fmt"
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"strconv"
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"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
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"github.com/nspcc-dev/neo-go/pkg/io"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag"
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"github.com/nspcc-dev/neo-go/pkg/util"
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"github.com/nspcc-dev/neo-go/pkg/vm/emit"
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"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
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)
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// expandArrayIntoScript pushes all FuncParam parameters from the given array
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// into the given buffer in reverse order.
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func expandArrayIntoScript(script *io.BinWriter, slice []Param) error {
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for j := len(slice) - 1; j >= 0; j-- {
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fp, err := slice[j].GetFuncParam()
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if err != nil {
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return err
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}
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switch fp.Type {
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case smartcontract.ByteArrayType:
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str, err := fp.Value.GetBytesBase64()
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if err != nil {
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return err
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}
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emit.Bytes(script, str)
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case smartcontract.SignatureType:
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str, err := fp.Value.GetBytesHex()
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if err != nil {
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return err
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}
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emit.Bytes(script, str)
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case smartcontract.StringType:
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str, err := fp.Value.GetString()
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if err != nil {
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return err
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}
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emit.String(script, str)
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case smartcontract.Hash160Type:
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hash, err := fp.Value.GetUint160FromHex()
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if err != nil {
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return err
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}
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emit.Bytes(script, hash.BytesBE())
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case smartcontract.Hash256Type:
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hash, err := fp.Value.GetUint256()
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if err != nil {
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return err
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}
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emit.Bytes(script, hash.BytesBE())
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case smartcontract.PublicKeyType:
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str, err := fp.Value.GetString()
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if err != nil {
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return err
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}
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key, err := keys.NewPublicKeyFromString(string(str))
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if err != nil {
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return err
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}
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emit.Bytes(script, key.Bytes())
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case smartcontract.IntegerType:
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val, err := fp.Value.GetInt()
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if err != nil {
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return err
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}
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emit.Int(script, int64(val))
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case smartcontract.BoolType:
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str, err := fp.Value.GetString()
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if err != nil {
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return err
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}
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switch str {
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case "true":
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emit.Int(script, 1)
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case "false":
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emit.Int(script, 0)
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default:
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return errors.New("wrong boolean value")
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}
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case smartcontract.ArrayType:
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val, err := fp.Value.GetArray()
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if err != nil {
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return err
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}
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err = expandArrayIntoScript(script, val)
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if err != nil {
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return err
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}
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emit.Int(script, int64(len(val)))
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emit.Opcodes(script, opcode.PACK)
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default:
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return fmt.Errorf("parameter type %v is not supported", fp.Type)
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}
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}
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return nil
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}
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// CreateFunctionInvocationScript creates a script to invoke given contract with
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// given parameters.
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func CreateFunctionInvocationScript(contract util.Uint160, method string, params Params) ([]byte, error) {
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script := io.NewBufBinWriter()
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for i := len(params) - 1; i >= 0; i-- {
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switch params[i].Type {
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case StringT:
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emit.String(script.BinWriter, params[i].String())
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case NumberT:
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num, err := params[i].GetInt()
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if err != nil {
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return nil, err
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}
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emit.String(script.BinWriter, strconv.Itoa(num))
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case ArrayT:
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slice, err := params[i].GetArray()
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if err != nil {
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return nil, err
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}
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err = expandArrayIntoScript(script.BinWriter, slice)
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if err != nil {
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return nil, err
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}
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emit.Int(script.BinWriter, int64(len(slice)))
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emit.Opcodes(script.BinWriter, opcode.PACK)
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}
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}
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emit.AppCallNoArgs(script.BinWriter, contract, method, callflag.All)
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return script.Bytes(), nil
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}
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