go-pulse/cmd/devp2p/internal/ethtest/large.go

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// Copyright 2020 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package ethtest
import (
"crypto/rand"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/core/types"
)
// largeNumber returns a very large big.Int.
func largeNumber(megabytes int) *big.Int {
buf := make([]byte, megabytes*1024*1024)
rand.Read(buf)
bigint := new(big.Int)
bigint.SetBytes(buf)
return bigint
}
// largeBuffer returns a very large buffer.
func largeBuffer(megabytes int) []byte {
buf := make([]byte, megabytes*1024*1024)
rand.Read(buf)
return buf
}
// largeString returns a very large string.
func largeString(megabytes int) string {
buf := make([]byte, megabytes*1024*1024)
rand.Read(buf)
return hexutil.Encode(buf)
}
func largeBlock() *types.Block {
return types.NewBlockWithHeader(largeHeader())
}
// Returns a random hash
func randHash() common.Hash {
var h common.Hash
rand.Read(h[:])
return h
}
func largeHeader() *types.Header {
return &types.Header{
MixDigest: randHash(),
ReceiptHash: randHash(),
TxHash: randHash(),
Nonce: types.BlockNonce{},
Extra: []byte{},
Bloom: types.Bloom{},
GasUsed: 0,
Coinbase: common.Address{},
GasLimit: 0,
UncleHash: randHash(),
Time: 1337,
ParentHash: randHash(),
Root: randHash(),
Number: largeNumber(2),
Difficulty: largeNumber(2),
}
}