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operation.go
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operation.go
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// (c) 2019-2020, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package avm
import (
"bytes"
"errors"
"sort"
"github.com/ava-labs/avalanchego/codec"
"github.com/ava-labs/avalanchego/ids"
"github.com/ava-labs/avalanchego/utils"
"github.com/ava-labs/avalanchego/utils/crypto"
"github.com/ava-labs/avalanchego/vms/components/avax"
"github.com/ava-labs/avalanchego/vms/components/verify"
)
var (
errNilOperation = errors.New("nil operation is not valid")
errNilFxOperation = errors.New("nil fx operation is not valid")
errNotSortedAndUniqueUTXOIDs = errors.New("utxo IDs not sorted and unique")
)
type Operation struct {
avax.Asset `serialize:"true"`
UTXOIDs []*avax.UTXOID `serialize:"true" json:"inputIDs"`
FxID ids.ID `serialize:"false" json:"fxID"`
Op FxOperation `serialize:"true" json:"operation"`
}
// Verify implements the verify.Verifiable interface
func (op *Operation) Verify(c codec.Manager) error {
switch {
case op == nil:
return errNilOperation
case op.Op == nil:
return errNilFxOperation
case !avax.IsSortedAndUniqueUTXOIDs(op.UTXOIDs):
return errNotSortedAndUniqueUTXOIDs
default:
return verify.All(&op.Asset, op.Op)
}
}
type innerSortOperation struct {
ops []*Operation
codec codec.Manager
}
func (ops *innerSortOperation) Less(i, j int) bool {
iOp := ops.ops[i]
jOp := ops.ops[j]
iBytes, err := ops.codec.Marshal(codecVersion, iOp)
if err != nil {
return false
}
jBytes, err := ops.codec.Marshal(codecVersion, jOp)
if err != nil {
return false
}
return bytes.Compare(iBytes, jBytes) == -1
}
func (ops *innerSortOperation) Len() int { return len(ops.ops) }
func (ops *innerSortOperation) Swap(i, j int) { o := ops.ops; o[j], o[i] = o[i], o[j] }
func sortOperations(ops []*Operation, c codec.Manager) {
sort.Sort(&innerSortOperation{ops: ops, codec: c})
}
func isSortedAndUniqueOperations(ops []*Operation, c codec.Manager) bool {
return utils.IsSortedAndUnique(&innerSortOperation{ops: ops, codec: c})
}
type innerSortOperationsWithSigners struct {
ops []*Operation
signers [][]*crypto.PrivateKeySECP256K1R
codec codec.Manager
}
func (ops *innerSortOperationsWithSigners) Less(i, j int) bool {
iOp := ops.ops[i]
jOp := ops.ops[j]
iBytes, err := ops.codec.Marshal(codecVersion, iOp)
if err != nil {
return false
}
jBytes, err := ops.codec.Marshal(codecVersion, jOp)
if err != nil {
return false
}
return bytes.Compare(iBytes, jBytes) == -1
}
func (ops *innerSortOperationsWithSigners) Len() int { return len(ops.ops) }
func (ops *innerSortOperationsWithSigners) Swap(i, j int) {
ops.ops[j], ops.ops[i] = ops.ops[i], ops.ops[j]
ops.signers[j], ops.signers[i] = ops.signers[i], ops.signers[j]
}
func sortOperationsWithSigners(ops []*Operation, signers [][]*crypto.PrivateKeySECP256K1R, codec codec.Manager) {
sort.Sort(&innerSortOperationsWithSigners{ops: ops, signers: signers, codec: codec})
}