mirror of
https://github.com/luxfi/node.git
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zeekay
7cf87b230b
The module already called itself github.com/luxfi/node while containing no node in Go: cmd/luxd was twenty-one lines that printed the size of a few types, and the Go column of the matrix measured a VM plugin. A repo that fetches the thing it claims to be has not replaced it, so the Go sources move in — 1515 files, the daemon and everything under it — and the build reaches outside this module for nothing. Rust and C++ sit beside it unchanged and are still measured against it by the differential. That is the point of one repo: the reference implementation and the two ports are the same checkout, so parity is a thing you can run rather than a thing you assert. Verified: builds, and the closure carries no lux-private — checked at build time rather than believed. The daemon starts twelve chains on a local network (P X C Q Z A B G K M F, plus D through its plugin) and reports healthy.
147 lines
3.5 KiB
Go
147 lines
3.5 KiB
Go
// Copyright (C) 2019-2025, Lux Industries Inc. All rights reserved.
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// See the file LICENSE for licensing terms.
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package builder
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import (
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"context"
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"sync"
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"time"
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"github.com/luxfi/concurrent/lock"
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"github.com/luxfi/container/linked"
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"github.com/luxfi/database/versiondb"
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"github.com/luxfi/ids"
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"github.com/luxfi/node/vms/example/xsvm/chain"
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"github.com/luxfi/node/vms/example/xsvm/execute"
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"github.com/luxfi/node/vms/example/xsvm/tx"
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"github.com/luxfi/runtime"
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vmcore "github.com/luxfi/vm"
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xsblock "github.com/luxfi/node/vms/example/xsvm/block"
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)
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const MaxTxsPerBlock = 10
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var _ Builder = (*builder)(nil)
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type Builder interface {
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SetPreference(preferred ids.ID)
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AddTx(ctx context.Context, tx *tx.Tx) error
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WaitForEvent(ctx context.Context) (vmcore.Message, error)
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BuildBlock(ctx context.Context, blockContext *runtime.Runtime) (chain.Block, error)
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}
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type builder struct {
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chainRuntime *runtime.Runtime
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chain chain.Chain
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preference ids.ID
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// pendingTxsCond is awoken once there is at least one pending transaction.
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pendingTxsCond *lock.Cond
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pendingTxs *linked.Hashmap[ids.ID, *tx.Tx]
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}
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func New(chainRuntime *runtime.Runtime, chain chain.Chain) Builder {
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return &builder{
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chainRuntime: chainRuntime,
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chain: chain,
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preference: chain.LastAccepted(),
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pendingTxsCond: lock.NewCond(&sync.Mutex{}),
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pendingTxs: linked.NewHashmap[ids.ID, *tx.Tx](),
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}
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}
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func (b *builder) SetPreference(preferred ids.ID) {
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b.preference = preferred
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}
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func (b *builder) AddTx(_ context.Context, newTx *tx.Tx) error {
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txID, err := newTx.ID()
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if err != nil {
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return err
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}
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b.pendingTxsCond.L.Lock()
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defer b.pendingTxsCond.L.Unlock()
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b.pendingTxs.Put(txID, newTx)
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b.pendingTxsCond.Broadcast()
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return nil
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}
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func (b *builder) WaitForEvent(ctx context.Context) (vmcore.Message, error) {
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b.pendingTxsCond.L.Lock()
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defer b.pendingTxsCond.L.Unlock()
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for b.pendingTxs.Len() == 0 {
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if err := b.pendingTxsCond.Wait(ctx); err != nil {
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return vmcore.Message{}, err
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}
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}
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return vmcore.Message{Type: vmcore.PendingTxs}, nil
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}
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func (b *builder) BuildBlock(ctx context.Context, blockContext *runtime.Runtime) (chain.Block, error) {
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preferredBlk, err := b.chain.GetBlock(b.preference)
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if err != nil {
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return nil, err
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}
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preferredState, err := preferredBlk.State()
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if err != nil {
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return nil, err
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}
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parentTimestamp := preferredBlk.Timestamp()
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timestamp := time.Now().Truncate(time.Second)
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if timestamp.Before(parentTimestamp) {
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timestamp = parentTimestamp
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}
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wipBlock := xsblock.Stateless{
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ParentID: b.preference,
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Timestamp: timestamp.Unix(),
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Height: preferredBlk.Height() + 1,
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}
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b.pendingTxsCond.L.Lock()
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defer b.pendingTxsCond.L.Unlock()
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currentState := versiondb.New(preferredState)
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for len(wipBlock.Txs) < MaxTxsPerBlock {
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txID, currentTx, exists := b.pendingTxs.Oldest()
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if !exists {
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break
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}
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b.pendingTxs.Delete(txID)
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sender, err := currentTx.SenderID()
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if err != nil {
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// This tx was invalid, drop it and continue block building
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continue
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}
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txState := versiondb.New(currentState)
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txExecutor := execute.Tx{
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Context: ctx,
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Runtime: b.chainRuntime,
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Database: txState,
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BlockContext: blockContext,
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TxID: txID,
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Sender: sender,
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}
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if err := currentTx.Unsigned.Visit(&txExecutor); err != nil {
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// This tx was invalid, drop it and continue block building
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continue
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}
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if err := txState.Commit(); err != nil {
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return nil, err
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}
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wipBlock.Txs = append(wipBlock.Txs, currentTx)
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}
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return b.chain.NewBlock(&wipBlock)
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}
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