code.vegaprotocol.io/vega@v0.79.0/core/blockchain/abci/genesis.go (about)

     1  // Copyright (C) 2023 Gobalsky Labs Limited
     2  //
     3  // This program is free software: you can redistribute it and/or modify
     4  // it under the terms of the GNU Affero General Public License as
     5  // published by the Free Software Foundation, either version 3 of the
     6  // License, or (at your option) any later version.
     7  //
     8  // This program is distributed in the hope that it will be useful,
     9  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    10  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    11  // GNU Affero General Public License for more details.
    12  //
    13  // You should have received a copy of the GNU Affero General Public License
    14  // along with this program.  If not, see <http://www.gnu.org/licenses/>.
    15  
    16  package abci
    17  
    18  import (
    19  	"encoding/json"
    20  	"errors"
    21  )
    22  
    23  var ErrNoNetworkGenesisState = errors.New("no network genesis state")
    24  
    25  type GenesisState struct {
    26  	// ReplayAttackThreshold protects the network against replay attacks. It sets a
    27  	// toleration thershold between the current block in the chain and the block
    28  	// heigh specified in the Tx.  Tx with blocks height >= than (chain's height -
    29  	// distance) are rejected with a AbciTxnRejected.  It also keeps a ring-buffer
    30  	// to cache seen Tx. The Ring buffer size defines the number of block to cache,
    31  	// each block can hold an unlimited number of Txs.
    32  	ReplayAttackThreshold uint `json:"replay_attack_threshold"`
    33  }
    34  
    35  func DefaultGenesis() GenesisState {
    36  	return GenesisState{
    37  		ReplayAttackThreshold: 150,
    38  	}
    39  }
    40  
    41  func LoadGenesisState(bytes []byte) (*GenesisState, error) {
    42  	state := struct {
    43  		Network *GenesisState `json:"network"`
    44  	}{}
    45  	if err := json.Unmarshal(bytes, &state); err != nil {
    46  		return nil, err
    47  	}
    48  
    49  	if state.Network == nil {
    50  		return nil, ErrNoNetworkGenesisState
    51  	}
    52  
    53  	return state.Network, nil
    54  }