path: root/eth/bad_block.go

// Copyright 2016 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 eth

import (
    "bytes"
    "encoding/json"
    "fmt"
    "net/http"
    "time"

    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/core/types"
    "github.com/ethereum/go-ethereum/log"
    "github.com/ethereum/go-ethereum/rlp"
)

const (
    // The Ethereum main network genesis block.
    defaultGenesisHash = "0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3"
    badBlocksURL       = "https://badblocks.ethdev.com"
)

var EnableBadBlockReporting = false

func sendBadBlockReport(block *types.Block, err error) {
    if !EnableBadBlockReporting {
        return
    }

    var (
        blockRLP, _ = rlp.EncodeToBytes(block)
        params      = map[string]interface{}{
            "block":     common.Bytes2Hex(blockRLP),
            "blockHash": block.Hash().Hex(),
            "errortype": err.Error(),
            "client":    "go",
        }
    )
    if !block.ReceivedAt.IsZero() {
        params["receivedAt"] = block.ReceivedAt.UTC().String()
    }
    if p, ok := block.ReceivedFrom.(*peer); ok {
        params["receivedFrom"] = map[string]interface{}{
            "enode":           fmt.Sprintf("enode://%x@%v", p.ID(), p.RemoteAddr()),
            "name":            p.Name(),
            "protocolVersion": p.version,
        }
    }
    jsonStr, _ := json.Marshal(map[string]interface{}{"method": "eth_badBlock", "id": "1", "jsonrpc": "2.0", "params": []interface{}{params}})
    client := http.Client{Timeout: 8 * time.Second}
    resp, err := client.Post(badBlocksURL, "application/json", bytes.NewReader(jsonStr))
    if err != nil {
        log.Debug(fmt.Sprint(err))
        return
    }
    log.Debug(fmt.Sprintf("Bad Block Report posted (%d)", resp.StatusCode))
    resp.Body.Close()
}