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|
package test
import (
"Chain/pkg/block"
"Chain/pkg/blockchain/blockinfodatabase"
"Chain/pkg/blockchain/chainwriter"
"fmt"
"os"
)
// cleanUp removes any directories created by a test.
func cleanUp() {
removeBlockInfoDB()
removeCoinDB()
removeDataDB()
}
// removeCoinDB removes the coin database's level db.
func removeCoinDB() {
if _, err := os.Stat("./coindata"); !os.IsNotExist(err) {
if err2 := os.RemoveAll("./coindata"); err2 != nil {
fmt.Errorf("coudld not remove leveldb coindata")
}
}
}
// removeBlockInfoDB removes the block info database's level db.
func removeBlockInfoDB() {
if _, err := os.Stat("./blockinfodata"); !os.IsNotExist(err) {
if err2 := os.RemoveAll("./blockinfodata"); err2 != nil {
fmt.Errorf("coudld not remove leveldb blockinfodata")
}
}
}
//removeDataDB removes the chain writer's data directory.
func removeDataDB() {
if _, err := os.Stat("./data"); !os.IsNotExist(err) {
if err2 := os.RemoveAll("./data"); err2 != nil {
fmt.Errorf("coudld not remove directory data")
}
}
}
// MockedHeader returns a mocked Header.
func MockedHeader() *block.Header {
return &block.Header{
Version: 0,
PreviousHash: "",
MerkleRoot: "",
DifficultyTarget: "",
Nonce: 0,
Timestamp: 0,
}
}
// MockedBlockRecord returns a mocked BlockRecord.
func MockedBlockRecord() *blockinfodatabase.BlockRecord {
return &blockinfodatabase.BlockRecord{
Header: MockedHeader(),
Height: 0,
NumberOfTransactions: 0,
BlockFile: "./blockinfodata/block_0",
BlockStartOffset: 0,
BlockEndOffset: 10,
UndoFile: "",
UndoStartOffset: 0,
UndoEndOffset: 0,
}
}
// MockedTransactionInput returns a mocked TransactionInput.
func MockedTransactionInput() *block.TransactionInput {
return &block.TransactionInput{
ReferenceTransactionHash: "",
OutputIndex: 0,
UnlockingScript: "",
}
}
// MockedTransactionOutput returns a mocked TransactionOutput.
func MockedTransactionOutput() *block.TransactionOutput {
return &block.TransactionOutput{
Amount: 0,
LockingScript: "",
}
}
// MockedBlock returns a mocked Transaction.
func MockedTransaction() *block.Transaction {
return &block.Transaction{
Version: 0,
Inputs: []*block.TransactionInput{MockedTransactionInput()},
Outputs: []*block.TransactionOutput{MockedTransactionOutput()},
LockTime: 0,
}
}
// MockedBlock returns a mocked Block.
func MockedBlock() *block.Block {
return &block.Block{
Header: MockedHeader(),
Transactions: []*block.Transaction{MockedTransaction()},
}
}
// MockedUndoBlock returns a mocked UndoBlock.
func MockedUndoBlock() *chainwriter.UndoBlock {
return &chainwriter.UndoBlock{
TransactionInputHashes: []string{""},
OutputIndexes: []uint32{1},
Amounts: []uint32{1},
LockingScripts: []string{""},
}
}
//GenesisBlock returns the genesis block for testing purposes.
func GenesisBlock() *block.Block {
txo := &block.TransactionOutput{
Amount: 1_000_000_000,
LockingScript: "pubkey",
}
genTx := &block.Transaction{
Version: 0,
Inputs: nil,
Outputs: []*block.TransactionOutput{txo},
LockTime: 0,
}
return &block.Block{
Header: &block.Header{
Version: 0,
PreviousHash: "",
MerkleRoot: "",
DifficultyTarget: "",
Nonce: 0,
Timestamp: 0,
},
Transactions: []*block.Transaction{genTx},
}
}
// MakeBlockFromPrev creates a new Block from an existing Block,
// using the old Block's TransactionOutputs as TransactionInputs
// for the new Transaction.
func MakeBlockFromPrev(b *block.Block) *block.Block {
newHeader := &block.Header{
Version: 0,
PreviousHash: b.Hash(),
MerkleRoot: "",
DifficultyTarget: "",
Nonce: 0,
Timestamp: 0,
}
var transactions []*block.Transaction
for _, tx := range b.Transactions {
txHash := tx.Hash()
for i, txo := range tx.Outputs {
txi := &block.TransactionInput{
ReferenceTransactionHash: txHash,
OutputIndex: uint32(i),
UnlockingScript: "",
}
txo1 := &block.TransactionOutput{
Amount: txo.Amount / 2,
LockingScript: "",
}
tx1 := &block.Transaction{
Version: uint32(i),
Inputs: []*block.TransactionInput{txi},
Outputs: []*block.TransactionOutput{txo1},
LockTime: 0,
}
transactions = append(transactions, tx1)
}
}
return &block.Block{
Header: newHeader,
Transactions: transactions,
}
}
// UndoBlockFromBlock creates an UndoBlock from a Block.
// This function only works because we're not using inputs from
// other Blocks. It also does not actually take care of amounts
// or public keys.
func UndoBlockFromBlock(b *block.Block) *chainwriter.UndoBlock {
var transactionHashes []string
var outputIndexes []uint32
var amounts []uint32
var lockingScripts []string
for _, tx := range b.Transactions {
for _, txi := range tx.Inputs {
transactionHashes = append(transactionHashes, txi.ReferenceTransactionHash)
outputIndexes = append(outputIndexes, txi.OutputIndex)
amounts = append(amounts, 0)
lockingScripts = append(lockingScripts, "")
}
}
return &chainwriter.UndoBlock{
TransactionInputHashes: transactionHashes,
OutputIndexes: outputIndexes,
Amounts: amounts,
LockingScripts: lockingScripts,
}
}
|
