124 lines
3.3 KiB
Go
124 lines
3.3 KiB
Go
package main
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import (
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"context"
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"errors"
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"fmt"
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"os"
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"sync"
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"github.com/jholdstock/dcrvsp/database"
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"github.com/jholdstock/dcrvsp/rpc"
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"github.com/jholdstock/dcrvsp/webapi"
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)
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func main() {
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// Create a context that is cancelled when a shutdown request is received
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// through an interrupt signal.
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ctx := withShutdownCancel(context.Background())
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go shutdownListener()
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// Run until error is returned, or shutdown is requested.
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if err := run(ctx); err != nil && !errors.Is(err, context.Canceled) {
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os.Exit(1)
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}
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}
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// run is the main startup and teardown logic performed by the main package. It
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// is responsible for parsing the config, creating a dcrwallet RPC client,
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// opening the database, starting the webserver, and stopping all started
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// services when the context is cancelled.
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func run(ctx context.Context) error {
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// Load config file and parse CLI args.
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cfg, err := loadConfig()
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if err != nil {
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// Don't use logger here because it may not be initialised.
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fmt.Fprintf(os.Stderr, "Config error: %v\n", err)
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return err
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}
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// Waitgroup for services to signal when they have shutdown cleanly.
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var shutdownWg sync.WaitGroup
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defer log.Info("Shutdown complete")
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// Open database.
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db, err := database.Open(ctx, &shutdownWg, cfg.dbPath)
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if err != nil {
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log.Errorf("Database error: %v", err)
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requestShutdown()
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shutdownWg.Wait()
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return err
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}
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// Create dcrwallet RPC client.
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walletRPC := rpc.Setup(ctx, &shutdownWg, cfg.WalletUser, cfg.WalletPass, cfg.WalletHost, cfg.dcrwCert)
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walletClient, err := walletRPC()
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if err != nil {
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log.Errorf("dcrwallet RPC error: %v", err)
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requestShutdown()
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shutdownWg.Wait()
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return err
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}
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signKey, pubKey, err := db.KeyPair()
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if err != nil {
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log.Errorf("Failed to get keypair: %v", err)
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requestShutdown()
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shutdownWg.Wait()
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return err
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}
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// Get the masterpubkey from the fees account, if it exists, and make
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// sure it matches the configuration.
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var existingXPub string
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err = walletClient.Call(ctx, "getmasterpubkey", &existingXPub, "fees")
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if err != nil {
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// TODO - ignore account not found
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log.Errorf("dcrwallet RPC error: %v", err)
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requestShutdown()
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shutdownWg.Wait()
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return err
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}
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// account exists - make sure it matches the configuration.
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if existingXPub != cfg.FeeXPub {
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log.Errorf("fees account xpub differs: %s != %s", existingXPub, cfg.FeeXPub)
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requestShutdown()
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shutdownWg.Wait()
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return err
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} else {
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// account does not exist - import xpub from configuration.
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if err = walletClient.Call(ctx, "importxpub", nil, "fees"); err != nil {
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log.Errorf("failed to import xpub: %v", err)
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requestShutdown()
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shutdownWg.Wait()
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return err
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}
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}
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// Create and start webapi server.
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apiCfg := webapi.Config{
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SignKey: signKey,
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PubKey: pubKey,
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VSPFee: cfg.VSPFee,
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NetParams: cfg.netParams.Params,
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}
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// TODO: Make releaseMode properly configurable. Release mode enables very
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// detailed webserver logging and live reloading of HTML templates.
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releaseMode := true
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err = webapi.Start(ctx, shutdownRequestChannel, &shutdownWg, cfg.Listen, db, walletRPC, releaseMode, apiCfg)
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if err != nil {
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log.Errorf("Failed to initialise webapi: %v", err)
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requestShutdown()
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shutdownWg.Wait()
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return err
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}
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// Wait for shutdown tasks to complete before returning.
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shutdownWg.Wait()
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return ctx.Err()
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}
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