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// Copyright 2016 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum 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.
//
// go-ethereum 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 go-ethereum. If not, see <http://www.gnu.org/licenses/>.
// Command bzzhash computes a swarm tree hash.
package main
import (
"fmt"
"log"
"os"
"github.com/ethereum/go-ethereum/swarm/storage"
"gopkg.in/urfave/cli.v1"
)
func hash(ctx *cli.Context) {
args := ctx.Args()
if len(args) < 1 {
log.Fatal("Usage: swarm hash <file name>")
}
f, err := os.Open(args[0])
if err != nil {
fmt.Println("Error opening file " + args[1])
os.Exit(1)
}
defer f.Close()
stat, _ := f.Stat()
chunker := storage.NewTreeChunker(storage.NewChunkerParams())
key, err := chunker.Split(f, stat.Size(), nil, nil, nil)
if err != nil {
log.Fatalf("%v\n", err)
} else {
fmt.Printf("%v\n", key)
}
}
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