Optimize eth_getBlockByNumber and eth_getBlockByHash implementations (#187)

* Avoid two step queries for creating a block object

* Use a db tx while fetching block objects

* Upgrade ipfs-ethdb
This commit is contained in:
prathamesh0 2022-08-23 12:42:19 +05:30 committed by GitHub
parent ddc7485c08
commit e40e8a7335
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
8 changed files with 162 additions and 196 deletions

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@ -29,7 +29,7 @@ jobs:
BUILD_KEY: ${{ secrets.BUILD_KEY }}
with:
STACK_ORCHESTRATOR_REF: "f2fd766f5400fcb9eb47b50675d2e3b1f2753702"
GO_ETHEREUM_REF: "2cea7024b4db754e43f36e39eb8d06fa42293df2"
GO_ETHEREUM_REF: "be1757b9fd884cb20c8d7faac8fa81fc49bb7216"
IPLD_ETH_DB_REF: "be345e0733d2c025e4082c5154e441317ae94cf7"
build:
name: Run docker build

View File

@ -5,7 +5,7 @@ services:
restart: on-failure
depends_on:
- ipld-eth-db
image: vulcanize/ipld-eth-db:v4.2.0-alpha
image: vulcanize/ipld-eth-db:v4.2.1-alpha
environment:
DATABASE_USER: "vdbm"
DATABASE_NAME: "vulcanize_testing"

4
go.mod
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@ -23,7 +23,7 @@ require (
github.com/spf13/viper v1.11.0
github.com/vulcanize/eth-ipfs-state-validator/v4 v4.0.6-alpha
github.com/vulcanize/gap-filler v0.4.0
github.com/vulcanize/ipfs-ethdb/v4 v4.0.5-alpha
github.com/vulcanize/ipfs-ethdb/v4 v4.0.6-alpha
gorm.io/driver/postgres v1.3.7
gorm.io/gorm v1.23.5
)
@ -274,7 +274,7 @@ require (
go.uber.org/multierr v1.8.0 // indirect
go.uber.org/zap v1.21.0 // indirect
go4.org v0.0.0-20200411211856-f5505b9728dd // indirect
golang.org/x/crypto v0.0.0-20220525230936-793ad666bf5e // indirect
golang.org/x/crypto v0.0.0-20220817201139-bc19a97f63c8 // indirect
golang.org/x/mod v0.6.0-dev.0.20220106191415-9b9b3d81d5e3 // indirect
golang.org/x/net v0.0.0-20220607020251-c690dde0001d // indirect
golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect

8
go.sum
View File

@ -1781,8 +1781,8 @@ github.com/vulcanize/gap-filler v0.4.0 h1:5VD9PG7UrjEub4rLxZmstWoHnBnVtXz9silIVd
github.com/vulcanize/gap-filler v0.4.0/go.mod h1:5awUyotIoJi6AuG0JPEm7SIwFZBD7Ecg0I8x7CdxcHI=
github.com/vulcanize/go-ethereum v1.10.21-statediff-4.1.2-alpha h1:ct+8FGuQnHA6SOGOQoAMINWdeexuSF40+IjF48J094A=
github.com/vulcanize/go-ethereum v1.10.21-statediff-4.1.2-alpha/go.mod h1:dNJkmCSbaasX0zfQM6pm1g3rWlW3EGhLOEZMScyrRAs=
github.com/vulcanize/ipfs-ethdb/v4 v4.0.5-alpha h1:NFRwWeMB3Q+QqLM9qdcHvfvWBxOk0lPwhOqXJpkIg30=
github.com/vulcanize/ipfs-ethdb/v4 v4.0.5-alpha/go.mod h1:WvYj0m0cLPAtoytTbcbE2nZ3Hg9iuuF+lY14dBVRWZQ=
github.com/vulcanize/ipfs-ethdb/v4 v4.0.6-alpha h1:iKpv+Bvc0HScak+NiGK4NeYGLWMZ1pyLmrZecHoUGYA=
github.com/vulcanize/ipfs-ethdb/v4 v4.0.6-alpha/go.mod h1:WvYj0m0cLPAtoytTbcbE2nZ3Hg9iuuF+lY14dBVRWZQ=
github.com/wI2L/jsondiff v0.2.0 h1:dE00WemBa1uCjrzQUUTE/17I6m5qAaN0EMFOg2Ynr/k=
github.com/wI2L/jsondiff v0.2.0/go.mod h1:axTcwtBkY4TsKuV+RgoMhHyHKKFRI6nnjRLi8LLYQnA=
github.com/wangjia184/sortedset v0.0.0-20160527075905-f5d03557ba30/go.mod h1:YkocrP2K2tcw938x9gCOmT5G5eCD6jsTz0SZuyAqwIE=
@ -1953,8 +1953,8 @@ golang.org/x/crypto v0.0.0-20210813211128-0a44fdfbc16e/go.mod h1:GvvjBRRGRdwPK5y
golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/crypto v0.0.0-20211108221036-ceb1ce70b4fa/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/crypto v0.0.0-20220518034528-6f7dac969898/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
golang.org/x/crypto v0.0.0-20220525230936-793ad666bf5e h1:T8NU3HyQ8ClP4SEE+KbFlg6n0NhuTsN4MyznaarGsZM=
golang.org/x/crypto v0.0.0-20220525230936-793ad666bf5e/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
golang.org/x/crypto v0.0.0-20220817201139-bc19a97f63c8 h1:GIAS/yBem/gq2MUqgNIzUHW7cJMmx3TGZOrnyYaNQ6c=
golang.org/x/crypto v0.0.0-20220817201139-bc19a97f63c8/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
golang.org/x/exp v0.0.0-20180321215751-8460e604b9de/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
golang.org/x/exp v0.0.0-20180807140117-3d87b88a115f/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=

View File

@ -39,7 +39,6 @@ import (
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/rpc"
"github.com/ethereum/go-ethereum/statediff/indexer/models"
"github.com/ethereum/go-ethereum/trie"
"github.com/jmoiron/sqlx"
log "github.com/sirupsen/logrus"
@ -192,7 +191,23 @@ func (b *Backend) HeaderByNumber(ctx context.Context, blockNumber rpc.BlockNumbe
// HeaderByHash gets the header for the provided block hash
func (b *Backend) HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error) {
_, headerRLP, err := b.IPLDRetriever.RetrieveHeaderByHash(hash)
// Begin tx
tx, err := b.DB.Beginx()
if err != nil {
return nil, err
}
defer func() {
if p := recover(); p != nil {
shared.Rollback(tx)
panic(p)
} else if err != nil {
shared.Rollback(tx)
} else {
err = tx.Commit()
}
}()
_, headerRLP, err := b.IPLDRetriever.RetrieveHeaderByHash(tx, hash)
if err != nil {
return nil, err
}
@ -281,7 +296,7 @@ func (b *Backend) BlockByNumberOrHash(ctx context.Context, blockNrOrHash rpc.Blo
return nil, errors.New("invalid arguments; neither block nor hash specified")
}
// BlockByNumber returns the requested canonical block.
// BlockByNumber returns the requested canonical block
func (b *Backend) BlockByNumber(ctx context.Context, blockNumber rpc.BlockNumber) (*types.Block, error) {
var err error
number := blockNumber.Int64()
@ -303,6 +318,7 @@ func (b *Backend) BlockByNumber(ctx context.Context, blockNumber rpc.BlockNumber
if number < 0 {
return nil, errNegativeBlockNumber
}
// Get the canonical hash
canonicalHash, err := b.GetCanonicalHash(uint64(number))
if err != nil {
@ -311,118 +327,12 @@ func (b *Backend) BlockByNumber(ctx context.Context, blockNumber rpc.BlockNumber
}
return nil, err
}
// Retrieve all the CIDs for the block
// TODO: optimize this by retrieving iplds directly rather than the cids first (this is remanent from when we fetched iplds through ipfs blockservice interface)
headerCID, uncleCIDs, txCIDs, rctCIDs, err := b.Retriever.RetrieveBlockByHash(canonicalHash)
if err != nil {
if err == sql.ErrNoRows {
return nil, nil
}
return nil, err
}
// Begin tx
tx, err := b.DB.Beginx()
if err != nil {
return nil, err
}
defer func() {
if p := recover(); p != nil {
shared.Rollback(tx)
panic(p)
} else if err != nil {
shared.Rollback(tx)
} else {
err = tx.Commit()
}
}()
// Fetch and decode the header IPLD
var headerIPLD models.IPLDModel
headerIPLD, err = b.Fetcher.FetchHeader(tx, headerCID)
if err != nil {
log.Error("error fetching header ipld", err)
if err == sql.ErrNoRows {
return nil, nil
}
return nil, err
}
var header types.Header
err = rlp.DecodeBytes(headerIPLD.Data, &header)
if err != nil {
return nil, err
}
// Fetch and decode the uncle IPLDs
var uncleIPLDs []models.IPLDModel
uncleIPLDs, err = b.Fetcher.FetchUncles(tx, uncleCIDs)
if err != nil {
log.Error("error fetching uncle iplds", err)
return nil, err
}
var uncles []*types.Header
for _, uncleIPLD := range uncleIPLDs {
var uncle types.Header
err = rlp.DecodeBytes(uncleIPLD.Data, &uncle)
if err != nil {
return nil, err
}
uncles = append(uncles, &uncle)
}
// Fetch and decode the transaction IPLDs
var txIPLDs []models.IPLDModel
txIPLDs, err = b.Fetcher.FetchTrxs(tx, txCIDs)
if err != nil {
log.Error("error fetching tx iplds", err)
return nil, err
}
var transactions []*types.Transaction
for _, txIPLD := range txIPLDs {
var transaction types.Transaction
err = transaction.UnmarshalBinary(txIPLD.Data)
if err != nil {
return nil, err
}
transactions = append(transactions, &transaction)
}
// Fetch and decode the receipt IPLDs
var rctIPLDs []models.IPLDModel
rctIPLDs, err = b.Fetcher.FetchRcts(tx, rctCIDs)
if err != nil {
log.Error("error fetching rct iplds", err)
return nil, err
}
var receipts []*types.Receipt
for _, rctIPLD := range rctIPLDs {
var receipt types.Receipt
nodeVal, err := DecodeLeafNode(rctIPLD.Data)
if err != nil {
return nil, err
}
err = receipt.UnmarshalBinary(nodeVal)
if err != nil {
return nil, err
}
receipts = append(receipts, &receipt)
}
// Compose everything together into a complete block
return types.NewBlock(&header, transactions, uncles, receipts, new(trie.Trie)), err
return b.BlockByHash(ctx, canonicalHash)
}
// BlockByHash returns the requested block. When fullTx is true all transactions in the block are returned in full
// detail, otherwise only the transaction hash is returned.
// BlockByHash returns the requested block
func (b *Backend) BlockByHash(ctx context.Context, hash common.Hash) (*types.Block, error) {
// Retrieve all the CIDs for the block
headerCID, uncleCIDs, txCIDs, rctCIDs, err := b.Retriever.RetrieveBlockByHash(hash)
if err != nil {
if err == sql.ErrNoRows {
return nil, nil
}
return nil, err
}
// Begin tx
tx, err := b.DB.Beginx()
if err != nil {
@ -439,85 +349,109 @@ func (b *Backend) BlockByHash(ctx context.Context, hash common.Hash) (*types.Blo
}
}()
// Fetch and decode the header IPLD
var headerIPLD models.IPLDModel
headerIPLD, err = b.Fetcher.FetchHeader(tx, headerCID)
// Fetch header
header, err := b.GetHeaderByBlockHash(tx, hash)
if err != nil {
log.Error("error fetching header ipld", err)
log.Error("error fetching header: ", err)
if err == sql.ErrNoRows {
return nil, nil
}
return nil, err
}
var header types.Header
err = rlp.DecodeBytes(headerIPLD.Data, &header)
// Fetch uncles
uncles, err := b.GetUnclesByBlockHash(tx, hash)
if err != nil && err != sql.ErrNoRows {
log.Error("error fetching uncles: ", err)
return nil, err
}
// Fetch transactions
transactions, err := b.GetTransactionsByBlockHash(tx, hash)
if err != nil && err != sql.ErrNoRows {
log.Error("error fetching transactions: ", err)
return nil, err
}
// Fetch receipts
receipts, err := b.GetReceiptsByBlockHash(tx, hash)
if err != nil && err != sql.ErrNoRows {
log.Error("error fetching receipts: ", err)
return nil, err
}
// Compose everything together into a complete block
return types.NewBlock(header, transactions, uncles, receipts, new(trie.Trie)), err
}
// GetHeaderByBlockHash retrieves header for a provided block hash
func (b *Backend) GetHeaderByBlockHash(tx *sqlx.Tx, hash common.Hash) (*types.Header, error) {
_, headerRLP, err := b.IPLDRetriever.RetrieveHeaderByHash(tx, hash)
if err != nil {
return nil, err
}
// Fetch and decode the uncle IPLDs
var uncleIPLDs []models.IPLDModel
uncleIPLDs, err = b.Fetcher.FetchUncles(tx, uncleCIDs)
header := new(types.Header)
return header, rlp.DecodeBytes(headerRLP, header)
}
// GetUnclesByBlockHash retrieves uncles for a provided block hash
func (b *Backend) GetUnclesByBlockHash(tx *sqlx.Tx, hash common.Hash) ([]*types.Header, error) {
_, uncleBytes, err := b.IPLDRetriever.RetrieveUnclesByBlockHash(tx, hash)
if err != nil {
log.Error("error fetching uncle iplds", err)
if err == sql.ErrNoRows {
return nil, nil
}
return nil, err
}
var uncles []*types.Header
for _, uncleIPLD := range uncleIPLDs {
uncles := make([]*types.Header, len(uncleBytes))
for i, bytes := range uncleBytes {
var uncle types.Header
err = rlp.DecodeBytes(uncleIPLD.Data, &uncle)
if err != nil {
return nil, err
}
uncles = append(uncles, &uncle)
}
// Fetch and decode the transaction IPLDs
var txIPLDs []models.IPLDModel
txIPLDs, err = b.Fetcher.FetchTrxs(tx, txCIDs)
if err != nil {
log.Error("error fetching tx iplds", err)
if err == sql.ErrNoRows {
return nil, nil
}
return nil, err
}
var transactions []*types.Transaction
for _, txIPLD := range txIPLDs {
var transaction types.Transaction
err = transaction.UnmarshalBinary(txIPLD.Data)
if err != nil {
return nil, err
}
transactions = append(transactions, &transaction)
}
// Fetch and decode the receipt IPLDs
var rctIPLDs []models.IPLDModel
rctIPLDs, err = b.Fetcher.FetchRcts(tx, rctCIDs)
if err != nil {
log.Error("error fetching rct iplds", err)
if err == sql.ErrNoRows {
return nil, nil
}
return nil, err
}
var receipts []*types.Receipt
for _, rctIPLD := range rctIPLDs {
var receipt types.Receipt
nodeVal, err := DecodeLeafNode(rctIPLD.Data)
err = rlp.DecodeBytes(bytes, &uncle)
if err != nil {
return nil, err
}
err = receipt.UnmarshalBinary(nodeVal)
if err != nil {
uncles[i] = &uncle
}
return uncles, nil
}
// GetTransactionsByBlockHash retrieves transactions for a provided block hash
func (b *Backend) GetTransactionsByBlockHash(tx *sqlx.Tx, hash common.Hash) (types.Transactions, error) {
_, transactionBytes, err := b.IPLDRetriever.RetrieveTransactionsByBlockHash(tx, hash)
if err != nil {
return nil, err
}
txs := make(types.Transactions, len(transactionBytes))
for i, txBytes := range transactionBytes {
var tx types.Transaction
if err := tx.UnmarshalBinary(txBytes); err != nil {
return nil, err
}
receipts = append(receipts, &receipt)
txs[i] = &tx
}
// Compose everything together into a complete block
return types.NewBlock(&header, transactions, uncles, receipts, new(trie.Trie)), err
return txs, nil
}
// GetReceiptsByBlockHash retrieves receipts for a provided block hash
func (b *Backend) GetReceiptsByBlockHash(tx *sqlx.Tx, hash common.Hash) (types.Receipts, error) {
_, receiptBytes, txs, err := b.IPLDRetriever.RetrieveReceiptsByBlockHash(tx, hash)
if err != nil {
return nil, err
}
rcts := make(types.Receipts, len(receiptBytes))
for i, rctBytes := range receiptBytes {
rct := new(types.Receipt)
if err := rct.UnmarshalBinary(rctBytes); err != nil {
return nil, err
}
rct.TxHash = txs[i]
rcts[i] = rct
}
return rcts, nil
}
// GetTransaction retrieves a tx by hash
@ -551,7 +485,23 @@ func (b *Backend) GetTransaction(ctx context.Context, txHash common.Hash) (*type
// GetReceipts retrieves receipts for provided block hash
func (b *Backend) GetReceipts(ctx context.Context, hash common.Hash) (types.Receipts, error) {
_, receiptBytes, txs, err := b.IPLDRetriever.RetrieveReceiptsByBlockHash(hash)
// Begin tx
tx, err := b.DB.Beginx()
if err != nil {
return nil, err
}
defer func() {
if p := recover(); p != nil {
shared.Rollback(tx)
panic(p)
} else if err != nil {
shared.Rollback(tx)
} else {
err = tx.Commit()
}
}()
_, receiptBytes, txs, err := b.IPLDRetriever.RetrieveReceiptsByBlockHash(tx, hash)
if err != nil {
return nil, err
}
@ -569,7 +519,23 @@ func (b *Backend) GetReceipts(ctx context.Context, hash common.Hash) (types.Rece
// GetLogs returns all the logs for the given block hash
func (b *Backend) GetLogs(ctx context.Context, hash common.Hash) ([][]*types.Log, error) {
_, receiptBytes, txs, err := b.IPLDRetriever.RetrieveReceiptsByBlockHash(hash)
// Begin tx
tx, err := b.DB.Beginx()
if err != nil {
return nil, err
}
defer func() {
if p := recover(); p != nil {
shared.Rollback(tx)
panic(p)
} else if err != nil {
shared.Rollback(tx)
} else {
err = tx.Commit()
}
}()
_, receiptBytes, txs, err := b.IPLDRetriever.RetrieveReceiptsByBlockHash(tx, hash)
if err != nil {
return nil, err
}

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@ -313,9 +313,9 @@ func (r *IPLDRetriever) RetrieveHeadersByBlockNumber(number uint64) ([]string, [
}
// RetrieveHeaderByHash returns the cid and rlp bytes for the header corresponding to the provided block hash
func (r *IPLDRetriever) RetrieveHeaderByHash(hash common.Hash) (string, []byte, error) {
func (r *IPLDRetriever) RetrieveHeaderByHash(tx *sqlx.Tx, hash common.Hash) (string, []byte, error) {
headerResult := new(ipldResult)
return headerResult.CID, headerResult.Data, r.db.Get(headerResult, RetrieveHeaderByHashPgStr, hash.Hex())
return headerResult.CID, headerResult.Data, tx.Get(headerResult, RetrieveHeaderByHashPgStr, hash.Hex())
}
// RetrieveUnclesByHashes returns the cids and rlp bytes for the uncles corresponding to the provided uncle hashes
@ -338,9 +338,9 @@ func (r *IPLDRetriever) RetrieveUnclesByHashes(hashes []common.Hash) ([]string,
}
// RetrieveUnclesByBlockHash returns the cids and rlp bytes for the uncles corresponding to the provided block hash (of non-omner root block)
func (r *IPLDRetriever) RetrieveUnclesByBlockHash(hash common.Hash) ([]string, [][]byte, error) {
func (r *IPLDRetriever) RetrieveUnclesByBlockHash(tx *sqlx.Tx, hash common.Hash) ([]string, [][]byte, error) {
uncleResults := make([]ipldResult, 0)
if err := r.db.Select(&uncleResults, RetrieveUnclesByBlockHashPgStr, hash.Hex()); err != nil {
if err := tx.Select(&uncleResults, RetrieveUnclesByBlockHashPgStr, hash.Hex()); err != nil {
return nil, nil, err
}
cids := make([]string, len(uncleResults))
@ -393,9 +393,9 @@ func (r *IPLDRetriever) RetrieveTransactionsByHashes(hashes []common.Hash) ([]st
}
// RetrieveTransactionsByBlockHash returns the cids and rlp bytes for the transactions corresponding to the provided block hash
func (r *IPLDRetriever) RetrieveTransactionsByBlockHash(hash common.Hash) ([]string, [][]byte, error) {
func (r *IPLDRetriever) RetrieveTransactionsByBlockHash(tx *sqlx.Tx, hash common.Hash) ([]string, [][]byte, error) {
txResults := make([]ipldResult, 0)
if err := r.db.Select(&txResults, RetrieveTransactionsByBlockHashPgStr, hash.Hex()); err != nil {
if err := tx.Select(&txResults, RetrieveTransactionsByBlockHashPgStr, hash.Hex()); err != nil {
return nil, nil, err
}
cids := make([]string, len(txResults))
@ -470,9 +470,9 @@ func (r *IPLDRetriever) RetrieveReceiptsByTxHashes(hashes []common.Hash) ([]stri
// RetrieveReceiptsByBlockHash returns the cids and rlp bytes for the receipts corresponding to the provided block hash.
// cid returned corresponds to the leaf node data which contains the receipt.
func (r *IPLDRetriever) RetrieveReceiptsByBlockHash(hash common.Hash) ([]string, [][]byte, []common.Hash, error) {
func (r *IPLDRetriever) RetrieveReceiptsByBlockHash(tx *sqlx.Tx, hash common.Hash) ([]string, [][]byte, []common.Hash, error) {
rctResults := make([]rctIpldResult, 0)
if err := r.db.Select(&rctResults, RetrieveReceiptsByBlockHashPgStr, hash.Hex()); err != nil {
if err := tx.Select(&rctResults, RetrieveReceiptsByBlockHashPgStr, hash.Hex()); err != nil {
return nil, nil, nil, err
}
cids := make([]string, len(rctResults))

View File

@ -4,16 +4,16 @@
- Clone [stack-orchestrator](https://github.com/vulcanize/stack-orchestrator), [ipld-eth-db](https://github.com/vulcanize/ipld-eth-db) [go-ethereum](https://github.com/vulcanize/go-ethereum) repositories.
- Checkout [v4 release](https://github.com/vulcanize/ipld-eth-db/releases/tag/v4.2.0-alpha) in ipld-eth-db repo.
- Checkout [v4 release](https://github.com/vulcanize/ipld-eth-db/releases/tag/v4.2.1-alpha) in ipld-eth-db repo.
```bash
# In ipld-eth-db repo.
git checkout v4.2.0-alpha
git checkout v4.2.1-alpha
```
- Checkout [v4 release](https://github.com/vulcanize/go-ethereum/releases/tag/v1.10.19-statediff-4.1.0-alpha) in go-ethereum repo.
- Checkout [v4 release](https://github.com/vulcanize/go-ethereum/releases/tag/v1.10.21-statediff-4.1.2-alpha) in go-ethereum repo.
```bash
# In go-ethereum repo.
git checkout v1.10.19-statediff-4.1.0-alpha
git checkout v1.10.21-statediff-4.1.2-alpha
```
- Checkout working commit in stack-orchestrator repo.

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@ -19,10 +19,10 @@ package version
import "fmt"
const (
Major = 2 // Major version component of the current release
Minor = 0 // Minor version component of the current release
Patch = 0 // Patch version component of the current release
Meta = "" // Version metadata to append to the version string
Major = 4 // Major version component of the current release
Minor = 1 // Minor version component of the current release
Patch = 5 // Patch version component of the current release
Meta = "alpha" // Version metadata to append to the version string
)
// Version holds the textual version string.