github.com/core-coin/go-core/v2@v2.1.9/core/mkalloc.go (about)

     1  // Copyright 2017 by the Authors
     2  // This file is part of the go-core library.
     3  //
     4  // The go-core library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-core library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-core library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  //go:build none
    18  // +build none
    19  
    20  /*
    21  The mkalloc tool creates the genesis allocation constants in genesis_alloc.go
    22  It outputs a const declaration that contains an RLP-encoded list of (address, balance) tuples.
    23  
    24  	go run mkalloc.go genesis.json
    25  */
    26  package main
    27  
    28  import (
    29  	"encoding/json"
    30  	"fmt"
    31  	"math/big"
    32  	"os"
    33  	"sort"
    34  	"strconv"
    35  
    36  	"github.com/core-coin/go-core/v2/core"
    37  	"github.com/core-coin/go-core/v2/rlp"
    38  )
    39  
    40  type allocItem struct{ Addr, Balance *big.Int }
    41  
    42  type allocList []allocItem
    43  
    44  func (a allocList) Len() int           { return len(a) }
    45  func (a allocList) Less(i, j int) bool { return a[i].Addr.Cmp(a[j].Addr) < 0 }
    46  func (a allocList) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
    47  
    48  func makelist(g *core.Genesis) allocList {
    49  	a := make(allocList, 0, len(g.Alloc))
    50  	for addr, account := range g.Alloc {
    51  		if len(account.Storage) > 0 || len(account.Code) > 0 || account.Nonce != 0 {
    52  			panic(fmt.Sprintf("can't encode account %x", addr))
    53  		}
    54  		bigAddr := new(big.Int).SetBytes(addr.Bytes())
    55  		a = append(a, allocItem{bigAddr, account.Balance})
    56  	}
    57  	sort.Sort(a)
    58  	return a
    59  }
    60  
    61  func makealloc(g *core.Genesis) string {
    62  	a := makelist(g)
    63  	data, err := rlp.EncodeToBytes(a)
    64  	if err != nil {
    65  		panic(err)
    66  	}
    67  	return strconv.QuoteToASCII(string(data))
    68  }
    69  
    70  func main() {
    71  	if len(os.Args) != 2 {
    72  		fmt.Fprintln(os.Stderr, "Usage: mkalloc genesis.json")
    73  		os.Exit(1)
    74  	}
    75  
    76  	g := new(core.Genesis)
    77  	file, err := os.Open(os.Args[1])
    78  	if err != nil {
    79  		panic(err)
    80  	}
    81  	if err := json.NewDecoder(file).Decode(g); err != nil {
    82  		panic(err)
    83  	}
    84  	fmt.Println("const allocData =", makealloc(g))
    85  }