28e1536d36
Top-level commands (serve, wallet, asset, service) now use core.Print(nil, ...) for package-level logging without Core instance. Chain internals keep log.Printf (pure package, no Core dependency). Co-Authored-By: Charon <charon@lethean.io>
137 lines
3.1 KiB
Go
137 lines
3.1 KiB
Go
// Copyright (c) 2017-2026 Lethean (https://lt.hn)
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//
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// Licensed under the European Union Public Licence (EUPL) version 1.2.
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// SPDX-License-Identifier: EUPL-1.2
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package blockchain
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import (
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"context"
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"net/http"
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"os/signal"
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"sync"
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"syscall"
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"time"
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"dappco.re/go/core"
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coreerr "dappco.re/go/core/log"
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"dappco.re/go/core/blockchain/chain"
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"dappco.re/go/core/blockchain/config"
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"dappco.re/go/core/blockchain/daemon"
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"dappco.re/go/core/blockchain/rpc"
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store "dappco.re/go/core/store"
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"github.com/spf13/cobra"
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)
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func newServeCmd(dataDir, seed *string, testnet *bool) *cobra.Command {
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var (
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rpcPort string
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rpcBind string
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)
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cmd := &cobra.Command{
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Use: "serve",
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Short: "Sync chain and serve JSON-RPC",
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Long: "Sync the blockchain from a seed node via RPC and serve a JSON-RPC API.",
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RunE: func(cmd *cobra.Command, args []string) error {
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return runServe(*dataDir, *seed, *testnet, rpcBind, rpcPort)
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},
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}
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cmd.Flags().StringVar(&rpcPort, "rpc-port", "47941", "JSON-RPC port")
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cmd.Flags().StringVar(&rpcBind, "rpc-bind", "127.0.0.1", "JSON-RPC bind address")
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return cmd
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}
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func runServe(dataDir, seed string, testnet bool, rpcBind, rpcPort string) error {
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if err := ensureDataDir(dataDir); err != nil {
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return err
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}
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dbPath := core.JoinPath(dataDir, "chain.db")
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s, err := store.New(dbPath)
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if err != nil {
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return coreerr.E("runServe", "open store", err)
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}
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defer s.Close()
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c := chain.New(s)
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cfg, forks := resolveConfig(testnet, &seed)
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// Set genesis hash for testnet.
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if testnet {
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chain.GenesisHash = "7cf844dc3e7d8dd6af65642c68164ebe18109aa5167b5f76043f310dd6e142d0"
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}
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ctx, cancel := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
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defer cancel()
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// Start RPC sync in background.
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var wg sync.WaitGroup
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wg.Add(1)
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go func() {
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defer wg.Done()
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rpcSyncLoop(ctx, c, &cfg, forks, seed)
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}()
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// Start JSON-RPC server.
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srv := daemon.NewServer(c, &cfg)
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addr := rpcBind + ":" + rpcPort
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core.Print(nil, "Go daemon RPC on %s (syncing from %s)", addr, seed)
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httpSrv := &http.Server{Addr: addr, Handler: srv}
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go func() {
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<-ctx.Done()
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httpSrv.Close()
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}()
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err = httpSrv.ListenAndServe()
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if err == http.ErrServerClosed {
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err = nil
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}
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cancel()
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wg.Wait()
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return err
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}
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// rpcSyncLoop syncs from a remote daemon via JSON-RPC (not P2P).
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func rpcSyncLoop(ctx context.Context, c *chain.Chain, cfg *config.ChainConfig, forks []config.HardFork, seed string) {
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opts := chain.SyncOptions{
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VerifySignatures: false,
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Forks: forks,
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}
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// Derive RPC URL from seed address (replace P2P port with RPC port).
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rpcURL := core.Sprintf("http://%s", seed)
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// If seed has P2P port, swap to RPC.
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if core.Contains(seed, ":46942") {
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rpcURL = "http://127.0.0.1:46941"
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} else if core.Contains(seed, ":36942") {
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rpcURL = "http://127.0.0.1:36941"
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}
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client := rpc.NewClient(rpcURL)
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for {
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select {
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case <-ctx.Done():
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return
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default:
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}
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if err := c.Sync(ctx, client, opts); err != nil {
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if ctx.Err() != nil {
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return
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}
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core.Print(nil, "rpc sync: %v (retrying in 10s)", err)
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}
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select {
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case <-ctx.Done():
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return
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case <-time.After(10 * time.Second):
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}
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}
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}
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