73 lines
2.0 KiB
Go
73 lines
2.0 KiB
Go
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// Blocks, blocks will have transactions.
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// Transactions/contracts are updated in goroutines
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// Each contract should send a message on a channel with usage statistics
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// The statics can be used for fee calculation within the block update method
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// Statistics{transaction, /* integers */ normal_ops, store_load, extro_balance, crypto, steps}
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// The block updater will wait for all goroutines to be finished and update the block accordingly
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// in one go and should use minimal IO overhead.
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// The actual block updating will happen within a goroutine as well so normal operation may continue
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package main
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import (
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"fmt"
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)
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type BlockManager struct {
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vm *Vm
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}
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func NewBlockManager() *BlockManager {
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bm := &BlockManager{vm: NewVm()}
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return bm
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}
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// Process a block.
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func (bm *BlockManager) ProcessBlock(block *Block) error {
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// Get the tx count. Used to create enough channels to 'join' the go routines
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txCount := len(block.transactions)
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// Locking channel. When it has been fully buffered this method will return
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lockChan := make(chan bool, txCount)
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// Process each transaction/contract
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for _, tx := range block.transactions {
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// If there's no recipient, it's a contract
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if tx.recipient == "" {
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go bm.ProcessContract(tx, block, lockChan)
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} else {
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// "finish" tx which isn't a contract
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lockChan <- true
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}
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}
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// Wait for all Tx to finish processing
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for i := 0; i < txCount; i++ {
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<- lockChan
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}
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return nil
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}
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func (bm *BlockManager) ProcessContract(tx *Transaction, block *Block, lockChan chan bool) {
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// Recovering function in case the VM had any errors
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defer func() {
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if r := recover(); r != nil {
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fmt.Println("Recovered from VM execution with err =", r)
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// Let the channel know where done even though it failed (so the execution may resume normally)
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lockChan <- true
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}
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}()
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// Process contract
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bm.vm.ProcContract(tx, block, func(opType OpType) bool {
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// TODO calculate fees
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return true // Continue
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})
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// Broadcast we're done
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lockChan <- true
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}
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