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unlock.go
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unlock.go
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// Copyright © 2020 Attestant Limited.
// 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 standard
import (
"context"
"time"
"github.com/attestantio/dirk/core"
"github.com/attestantio/dirk/rules"
"github.com/attestantio/dirk/services/checker"
"github.com/attestantio/dirk/services/ruler"
"github.com/pkg/errors"
e2wtypes "github.com/wealdtech/go-eth2-wallet-types/v2"
)
// Unlock unlocks an account.
func (s *Service) Unlock(ctx context.Context,
credentials *checker.Credentials,
accountName string,
passphrase []byte,
) (
core.Result,
error,
) {
started := time.Now()
if credentials == nil {
log.Error().Msg("No credentials supplied")
return core.ResultFailed, nil
}
log := log.With().
Str("request_id", credentials.RequestID).
Str("client", credentials.Client).
Str("account", accountName).
Str("action", "Unlock").
Logger()
log.Trace().Msg("Request received")
wallet, account, checkRes := s.preCheck(ctx, credentials, accountName, nil, ruler.ActionUnlockAccount)
if checkRes != core.ResultSucceeded {
s.monitor.AccountManagerCompleted(started, "unlock", checkRes)
return checkRes, nil
}
// Confirm approval via rules.
rulesData := []*ruler.RulesData{
{
WalletName: wallet.Name(),
AccountName: account.Name(),
PubKey: account.PublicKey().Marshal(),
Data: &rules.UnlockAccountData{},
},
}
results := s.ruler.RunRules(ctx, credentials, ruler.ActionUnlockAccount, rulesData)
switch results[0] {
case rules.DENIED:
s.monitor.AccountManagerCompleted(started, "unlock", core.ResultDenied)
return core.ResultDenied, nil
case rules.FAILED:
s.monitor.AccountManagerCompleted(started, "unlock", core.ResultFailed)
return core.ResultFailed, errors.New("rules check failed")
case rules.UNKNOWN:
s.monitor.AccountManagerCompleted(started, "unlock", core.ResultFailed)
return core.ResultFailed, errors.New("rules check indeterminate result")
case rules.APPROVED:
// Nothing to do.
}
// Unlock it.
locker, isLocker := account.(e2wtypes.AccountLocker)
if !isLocker {
// We cannot unlock this account, it may be through external means
// (for example, a hardware key). We return success to allow the
// control flow to proceed.
s.monitor.AccountManagerCompleted(started, "unlock", core.ResultSucceeded)
return core.ResultSucceeded, nil
}
if err := locker.Unlock(ctx, passphrase); err != nil {
s.monitor.AccountManagerCompleted(started, "unlock", core.ResultDenied)
//nolint:nilerr
return core.ResultDenied, nil
}
log.Trace().Str("result", "succeeded").Msg("Success")
s.monitor.AccountManagerCompleted(started, "unlock", core.ResultSucceeded)
return core.ResultSucceeded, nil
}