/
blocks.go
72 lines (58 loc) · 1.63 KB
/
blocks.go
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/*
* Flow Emulator
*
* Copyright 2019-2022 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 emulator
import (
"errors"
"github.com/onflow/flow-go/access"
"github.com/onflow/flow-go/fvm"
flowgo "github.com/onflow/flow-go/model/flow"
"github.com/onflow/flow-emulator/storage"
)
var _ fvm.Blocks = &blocks{}
var _ access.Blocks = &blocks{}
type blocks struct {
blockchain *Blockchain
headers *headers
}
func newBlocks(b *Blockchain) *blocks {
return &blocks{
blockchain: b,
headers: newHeaders(b),
}
}
func (b *blocks) HeaderByID(id flowgo.Identifier) (*flowgo.Header, error) {
block, err := b.blockchain.storage.BlockByID(id)
if err != nil {
if errors.Is(err, storage.ErrNotFound) {
return nil, nil
}
return nil, err
}
return block.Header, nil
}
func (b *blocks) FinalizedHeader() (*flowgo.Header, error) {
block, err := b.blockchain.storage.LatestBlock()
if err != nil {
return nil, err
}
return block.Header, nil
}
func (b *blocks) ByHeightFrom(height uint64, header *flowgo.Header) (*flowgo.Header, error) {
return fvm.NewBlockFinder(b.headers).
ByHeightFrom(height, header)
}