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-rw-r--r--core/mkalloc.go86
1 files changed, 86 insertions, 0 deletions
diff --git a/core/mkalloc.go b/core/mkalloc.go
new file mode 100644
index 0000000..5118a4f
--- /dev/null
+++ b/core/mkalloc.go
@@ -0,0 +1,86 @@
+// Copyright 2017 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/>.
+
+// +build none
+
+/*
+
+ The mkalloc tool creates the genesis allocation constants in genesis_alloc.go
+ It outputs a const declaration that contains an RLP-encoded list of (address, balance) tuples.
+
+ go run mkalloc.go genesis.json
+
+*/
+package main
+
+import (
+ "encoding/json"
+ "fmt"
+ "math/big"
+ "os"
+ "sort"
+ "strconv"
+
+ "github.com/ethereum/go-ethereum/core"
+ "github.com/ethereum/go-ethereum/rlp"
+)
+
+type allocItem struct{ Addr, Balance *big.Int }
+
+type allocList []allocItem
+
+func (a allocList) Len() int { return len(a) }
+func (a allocList) Less(i, j int) bool { return a[i].Addr.Cmp(a[j].Addr) < 0 }
+func (a allocList) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
+
+func makelist(g *core.Genesis) allocList {
+ a := make(allocList, 0, len(g.Alloc))
+ for addr, account := range g.Alloc {
+ if len(account.Storage) > 0 || len(account.Code) > 0 || account.Nonce != 0 {
+ panic(fmt.Sprintf("can't encode account %x", addr))
+ }
+ bigAddr := new(big.Int).SetBytes(addr.Bytes())
+ a = append(a, allocItem{bigAddr, account.Balance})
+ }
+ sort.Sort(a)
+ return a
+}
+
+func makealloc(g *core.Genesis) string {
+ a := makelist(g)
+ data, err := rlp.EncodeToBytes(a)
+ if err != nil {
+ panic(err)
+ }
+ return strconv.QuoteToASCII(string(data))
+}
+
+func main() {
+ if len(os.Args) != 2 {
+ fmt.Fprintln(os.Stderr, "Usage: mkalloc genesis.json")
+ os.Exit(1)
+ }
+
+ g := new(core.Genesis)
+ file, err := os.Open(os.Args[1])
+ if err != nil {
+ panic(err)
+ }
+ if err := json.NewDecoder(file).Decode(g); err != nil {
+ panic(err)
+ }
+ fmt.Println("const allocData =", makealloc(g))
+}