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// Copyright (C) 2019-2024 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package account
//go:generate dbgen -i root.sql -p account -n root -o rootInstall.go -h ../../scripts/LICENSE_HEADER
import (
"context"
"database/sql"
"fmt"
"github.com/algorand/go-algorand/crypto"
"github.com/algorand/go-algorand/crypto/merklesignature"
"github.com/algorand/go-algorand/data/basics"
"github.com/algorand/go-algorand/logging"
"github.com/algorand/go-algorand/protocol"
"github.com/algorand/go-algorand/util/db"
)
// A Root encapsulates a set of secrets which controls some store of money.
//
// A Root is authorized to spend money and create Participations
// for which this account is the parent.
//
// It handles persistence and secure deletion of secrets.
type Root struct {
secrets *crypto.SignatureSecrets
store db.Accessor
}
// GenerateRoot uses the system's source of randomness to generate an
// account.
func GenerateRoot(store db.Accessor) (Root, error) {
var seed crypto.Seed
crypto.RandBytes(seed[:])
return ImportRoot(store, seed)
}
// ImportRoot uses a provided source of randomness to instantiate an
// account.
func ImportRoot(store db.Accessor, seed [32]byte) (acc Root, err error) {
s := crypto.GenerateSignatureSecrets(seed)
raw := protocol.Encode(s)
err = store.Atomic(func(ctx context.Context, tx *sql.Tx) error {
err := rootInstallDatabase(tx)
if err != nil {
return fmt.Errorf("ImportRoot: failed to install database: %v", err)
}
stmt, err := tx.Prepare("insert into RootAccount values (?)")
if err != nil {
return fmt.Errorf("ImportRoot: failed to prepare statement: %v", err)
}
_, err = stmt.Exec(raw)
if err != nil {
return fmt.Errorf("ImportRoot: failed to insert account: %v", err)
}
return nil
})
if err != nil {
return
}
acc.secrets = s
acc.store = store
return
}
// RestoreRoot restores a Root from a database handle.
func RestoreRoot(store db.Accessor) (acc Root, err error) {
var raw []byte
err = store.Atomic(func(ctx context.Context, tx *sql.Tx) error {
var nrows int
row := tx.QueryRow("select count(*) from RootAccount")
err := row.Scan(&nrows)
if err != nil {
return fmt.Errorf("RestoreRoot: could not query storage: %v", err)
}
if nrows != 1 {
logging.Base().Infof("RestoreRoot: state not found (n = %v)", nrows)
}
row = tx.QueryRow("select data from RootAccount")
err = row.Scan(&raw)
if err != nil {
return fmt.Errorf("RestoreRoot: could not read account raw data: %v", err)
}
return nil
})
if err != nil {
return
}
acc.secrets = &crypto.SignatureSecrets{}
err = protocol.Decode(raw, acc.secrets)
if err != nil {
err = fmt.Errorf("RestoreRoot: error decoding account: %v", err)
return
}
acc.store = store
return
}
// Secrets returns the signing secrets associated with the Root account.
func (root Root) Secrets() *crypto.SignatureSecrets {
return root.secrets
}
// Address returns the address associated with the Root account.
func (root Root) Address() basics.Address {
return basics.Address(root.secrets.SignatureVerifier)
}
// RestoreParticipation restores a Participation from a database
// handle.
func RestoreParticipation(store db.Accessor) (acc PersistedParticipation, err error) {
var rawParent, rawVRF, rawVoting, rawStateProof []byte
err = Migrate(store)
if err != nil {
return
}
err = store.Atomic(func(ctx context.Context, tx *sql.Tx) error {
var nrows int
row := tx.QueryRow("select count(*) from ParticipationAccount")
err := row.Scan(&nrows)
if err != nil {
return fmt.Errorf("RestoreParticipation: could not query storage: %v", err)
}
if nrows != 1 {
logging.Base().Infof("RestoreParticipation: state not found (n = %v)", nrows)
}
row = tx.QueryRow("select parent, vrf, voting, firstValid, lastValid, keyDilution, stateProof from ParticipationAccount")
err = row.Scan(&rawParent, &rawVRF, &rawVoting, &acc.FirstValid, &acc.LastValid, &acc.KeyDilution, &rawStateProof)
if err != nil {
return fmt.Errorf("RestoreParticipation: could not read account raw data: %v", err)
}
copy(acc.Parent[:32], rawParent)
return nil
})
if err != nil {
return PersistedParticipation{}, err
}
acc.Store = store
acc.VRF = &crypto.VRFSecrets{}
err = protocol.Decode(rawVRF, acc.VRF)
if err != nil {
return PersistedParticipation{}, err
}
acc.Voting = &crypto.OneTimeSignatureSecrets{}
err = protocol.Decode(rawVoting, acc.Voting)
if err != nil {
return PersistedParticipation{}, err
}
if len(rawStateProof) == 0 {
return acc, nil
}
acc.StateProofSecrets = &merklesignature.Secrets{}
// only the state proof data is decoded here (the keys are stored in a different DB table and are fetched separately)
if err = protocol.Decode(rawStateProof, acc.StateProofSecrets); err != nil {
return PersistedParticipation{}, err
}
return acc, nil
}
// RestoreParticipationWithSecrets restores a Participation from a database
// handle. In addition, this function also restores all stateproof secrets
func RestoreParticipationWithSecrets(store db.Accessor) (PersistedParticipation, error) {
persistedParticipation, err := RestoreParticipation(store)
if err != nil {
return PersistedParticipation{}, err
}
if persistedParticipation.StateProofSecrets == nil { // no state proof keys to restore
return persistedParticipation, nil
}
err = persistedParticipation.StateProofSecrets.RestoreAllSecrets(store)
if err != nil {
return PersistedParticipation{}, err
}
return persistedParticipation, nil
}
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