feat(core): implement core MEV bot functionality with market scanning and Uniswap V3 pricing

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

vendor/github.com/crate-crypto/go-ipa/common/parallel/execute.go

@@ -0,0 +1,58 @@
+// Copyright 2020 ConsenSys Software Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package parallel
+
+import (
+	"runtime"
+	"sync"
+)
+
+// Execute process in parallel the work function
+func Execute(nbIterations int, work func(int, int), maxCpus ...int) {
+
+	nbTasks := runtime.NumCPU()
+	if len(maxCpus) == 1 {
+		nbTasks = maxCpus[0]
+	}
+	nbIterationsPerCpus := nbIterations / nbTasks
+
+	// more CPUs than tasks: a CPU will work on exactly one iteration
+	if nbIterationsPerCpus < 1 {
+		nbIterationsPerCpus = 1
+		nbTasks = nbIterations
+	}
+
+	var wg sync.WaitGroup
+
+	extraTasks := nbIterations - (nbTasks * nbIterationsPerCpus)
+	extraTasksOffset := 0
+
+	for i := 0; i < nbTasks; i++ {
+		wg.Add(1)
+		_start := i*nbIterationsPerCpus + extraTasksOffset
+		_end := _start + nbIterationsPerCpus
+		if extraTasks > 0 {
+			_end++
+			extraTasks--
+			extraTasksOffset++
+		}
+		go func() {
+			work(_start, _end)
+			wg.Done()
+		}()
+	}
+
+	wg.Wait()
+}