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error.go
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error.go
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// Copyright 2018 The Fractal Team Authors
// This file is part of the fractal project.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package blockchain
import (
"errors"
"fmt"
"github.com/fractalplatform/fractal/common"
)
var (
// ErrNoGenesis genesis block not found in chain db.
ErrNoGenesis = errors.New("Genesis not found in chain")
// ErrBlacklistedHash is returned if a block to import is on the blacklist.
ErrBlacklistedHash = errors.New("blacklisted hash")
errGenesisNoConfig = errors.New("genesis has no chain configuration")
)
// GenesisMismatchError is raised when trying to overwrite an existing
// genesis block with an incompatible one.
type GenesisMismatchError struct {
Stored, New common.Hash
}
func (e *GenesisMismatchError) Error() string {
return fmt.Sprintf("database already contains an incompatible genesis block (have %x, new %x)", e.Stored[:], e.New[:])
}