/
evm_location.go
106 lines (87 loc) · 2.28 KB
/
evm_location.go
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/*
* Flow Go SDK
*
* Copyright 2019 Dapper Labs, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package flow
import (
"encoding/json"
"fmt"
"strings"
"github.com/onflow/cadence/runtime/common"
)
const (
EVMLocationPrefix = "evm"
locationDivider = "."
)
var _ common.Location = EVMLocation{}
type EVMLocation struct{}
func (l EVMLocation) TypeID(
memoryGauge common.MemoryGauge,
qualifiedIdentifier string,
) common.TypeID {
id := fmt.Sprintf(
"%s%s%s",
EVMLocationPrefix,
locationDivider,
qualifiedIdentifier,
)
common.UseMemory(memoryGauge, common.NewRawStringMemoryUsage(len(id)))
return common.TypeID(id)
}
func (l EVMLocation) QualifiedIdentifier(typeID common.TypeID) string {
pieces := strings.SplitN(string(typeID), locationDivider, 2)
if len(pieces) < 2 {
return ""
}
return pieces[1]
}
func (l EVMLocation) String() string {
return EVMLocationPrefix
}
func (l EVMLocation) Description() string {
return EVMLocationPrefix
}
func (l EVMLocation) ID() string {
return EVMLocationPrefix
}
func (l EVMLocation) MarshalJSON() ([]byte, error) {
return json.Marshal(&struct {
Type string
}{
Type: "EVMLocation",
})
}
func init() {
common.RegisterTypeIDDecoder(
EVMLocationPrefix,
func(_ common.MemoryGauge, typeID string) (common.Location, string, error) {
if typeID == "" {
return nil, "", fmt.Errorf("invalid EVM type location ID: missing type prefix")
}
parts := strings.SplitN(typeID, ".", 2)
prefix := parts[0]
if prefix != EVMLocationPrefix {
return EVMLocation{}, "", fmt.Errorf("invalid EVM type location ID: invalid prefix")
}
var qualifiedIdentifier string
pieceCount := len(parts)
if pieceCount > 1 {
qualifiedIdentifier = parts[1]
}
return EVMLocation{}, qualifiedIdentifier, nil
},
)
}