79 lines
3.1 KiB
Go
79 lines
3.1 KiB
Go
// Copyright 2017-2021 DERO Project. All rights reserved.
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// Use of this source code in any form is governed by RESEARCH license.
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// license can be found in the LICENSE file.
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// GPG: 0F39 E425 8C65 3947 702A 8234 08B2 0360 A03A 9DE8
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//
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package main
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import "fmt"
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import "time"
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import "context"
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import "runtime/debug"
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import "golang.org/x/time/rate"
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import "github.com/deroproject/derohe/rpc"
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// rate limiter is deployed, in case RPC is exposed over internet
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// someone should not be just giving fake inputs and delay chain syncing
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var get_block_limiter = rate.NewLimiter(16.0, 8) // 16 req per sec, burst of 8 req is okay
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func (DERO_RPC_APIS) GetBlockTemplate(ctx context.Context, p rpc.GetBlockTemplate_Params) (result rpc.GetBlockTemplate_Result, err error) {
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defer func() { // safety so if anything wrong happens, we return error
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if r := recover(); r != nil {
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err = fmt.Errorf("panic occured. stack trace %s", debug.Stack())
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}
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}()
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/*
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if !get_block_limiter.Allow() { // if rate limiter allows, then add block to chain
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logger.Warnf("Too many get block template requests per sec rejected by chain.")
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return nil,&jsonrpc.Error{
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Code: jsonrpc.ErrorCodeInvalidRequest,
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Message: "Too many get block template requests per sec rejected by chain.",
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}
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}
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*/
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// validate address
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miner_address, err := rpc.NewAddress(p.Wallet_Address)
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if err != nil {
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return result, fmt.Errorf("Address could not be parsed, err:%s", err)
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}
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if p.Reserve_size > 255 || p.Reserve_size < 1 {
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return result, fmt.Errorf("Reserve size should be > 0 and < 255")
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}
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bl, block_hashing_blob_hex, block_template_hex, reserved_pos := chain.Create_new_block_template_mining(chain.Get_Top_ID(), *miner_address, int(p.Reserve_size))
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prev_hash := ""
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for i := range bl.Tips {
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prev_hash = prev_hash + bl.Tips[i].String()
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}
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return rpc.GetBlockTemplate_Result{
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Blocktemplate_blob: block_template_hex,
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Blockhashing_blob: block_hashing_blob_hex,
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Reserved_Offset: uint64(reserved_pos),
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Expected_reward: 0, // fill in actual reward
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Height: bl.Height,
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Prev_Hash: prev_hash,
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Epoch: uint64(uint64(time.Now().UTC().Unix())), // expiry time of this block
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Difficulty: chain.Get_Difficulty_At_Tips(bl.Tips).Uint64(),
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Status: "OK",
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}, nil
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}
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