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GeezerVison is showing github.com — CovenantSQL/types/bp_block.go at develop · CovenantSQL/CovenantSQL

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bp_block.go

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/*
* Copyright 2018 The CovenantSQL Authors.
*
* 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 types
import (
"time"
pi "github.com/CovenantSQL/CovenantSQL/blockproducer/interfaces"
"github.com/CovenantSQL/CovenantSQL/crypto/asymmetric"
"github.com/CovenantSQL/CovenantSQL/crypto/hash"
"github.com/CovenantSQL/CovenantSQL/crypto/verifier"
"github.com/CovenantSQL/CovenantSQL/merkle"
"github.com/CovenantSQL/CovenantSQL/proto"
)
//go:generate hsp
// BPHeader defines the main chain block header.
type BPHeader struct {
Version int32
Producer proto.AccountAddress
MerkleRoot hash.Hash
ParentHash hash.Hash
Timestamp time.Time
}
// BPSignedHeader defines the main chain header with the signature.
type BPSignedHeader struct {
BPHeader
verifier.DefaultHashSignVerifierImpl
}
func (s *BPSignedHeader) verifyHash() error {
return s.DefaultHashSignVerifierImpl.VerifyHash(&s.BPHeader)
}
func (s *BPSignedHeader) verify() error {
return s.DefaultHashSignVerifierImpl.Verify(&s.BPHeader)
}
func (s *BPSignedHeader) setHash() error {
return s.DefaultHashSignVerifierImpl.SetHash(&s.BPHeader)
}
func (s *BPSignedHeader) sign(signer *asymmetric.PrivateKey) error {
return s.DefaultHashSignVerifierImpl.Sign(&s.BPHeader, signer)
}
// BPBlock defines the main chain block.
type BPBlock struct {
SignedHeader BPSignedHeader
Transactions []pi.Transaction
}
// GetTxHashes returns all hashes of tx in block.{Billings, ...}.
func (b *BPBlock) GetTxHashes() []*hash.Hash {
// TODO(lambda): when you add new tx type, you need to put new tx's hash in the slice
// get hashes in block.Transactions
hs := make([]*hash.Hash, len(b.Transactions))
for i, v := range b.Transactions {
h := v.Hash()
hs[i] = &h
}
return hs
}
func (b *BPBlock) setMerkleRoot() {
var merkleRoot = merkle.NewMerkle(b.GetTxHashes()).GetRoot()
b.SignedHeader.MerkleRoot = *merkleRoot
}
func (b *BPBlock) verifyMerkleRoot() error {
var merkleRoot = *merkle.NewMerkle(b.GetTxHashes()).GetRoot()
if !merkleRoot.IsEqual(&b.SignedHeader.MerkleRoot) {
return ErrMerkleRootVerification
}
return nil
}
// SetHash sets the block header hash, including the merkle root of the packed transactions.
func (b *BPBlock) SetHash() error {
b.setMerkleRoot()
return b.SignedHeader.setHash()
}
// VerifyHash verifies the block header hash, including the merkle root of the packed transactions.
func (b *BPBlock) VerifyHash() error {
if err := b.verifyMerkleRoot(); err != nil {
return err
}
return b.SignedHeader.verifyHash()
}
// PackAndSignBlock computes block's hash and sign it.
func (b *BPBlock) PackAndSignBlock(signer *asymmetric.PrivateKey) error {
b.setMerkleRoot()
return b.SignedHeader.sign(signer)
}
// Verify verifies whether the block is valid.
func (b *BPBlock) Verify() error {
if err := b.verifyMerkleRoot(); err != nil {
return err
}
return b.SignedHeader.verify()
}
// Timestamp returns timestamp of block.
func (b *BPBlock) Timestamp() time.Time {
return b.SignedHeader.Timestamp
}
// Producer returns the producer of block.
func (b *BPBlock) Producer() proto.AccountAddress {
return b.SignedHeader.Producer
}
// ParentHash returns the parent hash field of the block header.
func (b *BPBlock) ParentHash() *hash.Hash {
return &b.SignedHeader.ParentHash
}
// BlockHash returns the parent hash field of the block header.
func (b *BPBlock) BlockHash() *hash.Hash {
return &b.SignedHeader.DataHash
}
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