89 lines
2.9 KiB
Go
89 lines
2.9 KiB
Go
// Copyright (c) 2021-2022 The Decred developers
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package database
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import (
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"fmt"
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"github.com/decred/slog"
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bolt "go.etcd.io/bbolt"
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)
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const (
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// initialVersion is the version of a freshly created database which has had
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// no upgrades applied.
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initialVersion = 1
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// removeOldFeeTxVersion deletes any raw fee transactions which remain in
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// the database after already having been confirmed on-chain. There is no
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// need to keep these, and they take up a lot of space.
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removeOldFeeTxVersion = 2
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// ticketBucketVersion changes the way tickets are stored. Previously they
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// were stored as JSON encoded strings in a single bucket. This upgrade
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// moves each ticket into its own bucket and does away with JSON encoding.
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ticketBucketVersion = 3
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// altSignAddrVersion adds a bucket to store alternate sign addresses used
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// to verify messages sent to the vspd.
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altSignAddrVersion = 4
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// latestVersion is the latest version of the database that is understood by
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// vspd. Databases with recorded versions higher than this will fail to open
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// (meaning any upgrades prevent reverting to older software).
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latestVersion = altSignAddrVersion
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)
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// upgrades maps between old database versions and the upgrade function to
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// upgrade the database to the next version.
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var upgrades = []func(tx *bolt.DB, log slog.Logger) error{
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initialVersion: removeOldFeeTxUpgrade,
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removeOldFeeTxVersion: ticketBucketUpgrade,
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ticketBucketVersion: altSignAddrUpgrade,
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}
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// v1Ticket has the json tags required to unmarshal tickets stored in the
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// v1 database format.
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type v1Ticket struct {
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Hash string `json:"hsh"`
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PurchaseHeight int64 `json:"phgt"`
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CommitmentAddress string `json:"cmtaddr"`
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FeeAddressIndex uint32 `json:"faddridx"`
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FeeAddress string `json:"faddr"`
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FeeAmount int64 `json:"famt"`
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FeeExpiration int64 `json:"fexp"`
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Confirmed bool `json:"conf"`
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VotingWIF string `json:"vwif"`
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VoteChoices map[string]string `json:"vchces"`
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FeeTxHex string `json:"fhex"`
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FeeTxHash string `json:"fhsh"`
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FeeTxStatus FeeStatus `json:"fsts"`
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Outcome TicketOutcome `json:"otcme"`
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}
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// Upgrade will update the database to the latest known version.
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func (vdb *VspDatabase) Upgrade(currentVersion uint32) error {
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if currentVersion == latestVersion {
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// No upgrades required.
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return nil
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}
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if currentVersion > latestVersion {
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// Database is too new.
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return fmt.Errorf("expected database version <= %d, got %d",
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latestVersion, currentVersion)
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}
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// Execute all necessary upgrades in order.
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for _, upgrade := range upgrades[currentVersion:] {
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err := upgrade(vdb.db, log)
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if err != nil {
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return err
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}
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}
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return nil
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}
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