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attribute.go
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attribute.go
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/*
* Copyright (C) 2018 The DNA Authors
* This file is part of The DNA library.
*
* The DNA is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The DNA is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with The DNA. If not, see <http://www.gnu.org/licenses/>.
*/
package wasmvm
import (
"bytes"
"github.com/dnaproject2/DNA/core/types"
"github.com/dnaproject2/DNA/errors"
"github.com/dnaproject2/DNA/vm/wasmvm/exec"
)
func (this *WasmVmService) attributeGetUsage(engine *exec.ExecutionEngine) (bool, error) {
vm := engine.GetVM()
envCall := vm.GetEnvCall()
params := envCall.GetParams()
if len(params) != 1 {
return false, errors.NewErr("[transactionGetHash] parameter count error")
}
attributebytes, err := vm.GetPointerMemory(params[0])
if err != nil {
return false, nil
}
attr := types.TxAttribute{}
err = attr.Deserialize(bytes.NewBuffer(attributebytes))
if err != nil {
return false, nil
}
vm.RestoreCtx()
vm.PushResult(uint64(attr.Usage))
return true, nil
}
func (this *WasmVmService) attributeGetData(engine *exec.ExecutionEngine) (bool, error) {
vm := engine.GetVM()
envCall := vm.GetEnvCall()
params := envCall.GetParams()
if len(params) != 1 {
return false, errors.NewErr("[transactionGetHash] parameter count error")
}
attributebytes, err := vm.GetPointerMemory(params[0])
if err != nil {
return false, nil
}
attr := types.TxAttribute{}
err = attr.Deserialize(bytes.NewBuffer(attributebytes))
if err != nil {
return false, nil
}
idx, err := vm.SetPointerMemory(attr.Data)
if err != nil {
return false, nil
}
vm.RestoreCtx()
vm.PushResult(uint64(idx))
return true, nil
}