public with sharing class acm_AutoConvertLeads {
    @InvocableMethod
    public static void assignAndConvertLeads(List<Id> leadIds) {

        List<Lead> allLeadsReceived = [SELECT Id, FirstName, LastName, Email FROM Lead WHERE Id IN :leadIds];

        LeadStatus convertedLeadStatus = [SELECT Id, MasterLabel FROM LeadStatus WHERE IsConverted = true LIMIT 1];
        List<Database.LeadConvert> massLeadConvert = new List<Database.LeadConvert>();
        for (Lead currentlead :allLeadsReceived) {

            Database.LeadConvert leadConvert = new Database.LeadConvert();
            leadConvert.setLeadId(currentlead.Id);
            leadConvert.setConvertedStatus(convertedLeadStatus.MasterLabel);
            leadConvert.setDoNotCreateOpportunity(TRUE);
            // create opportunity = false
            massLeadConvert.add(leadConvert);
        }


        Database.DMLOptions dmlAllow = new Database.DMLOptions();
        dmlAllow.DuplicateRuleHeader.AllowSave = true;
        List<Id> insertedLeadIds = new List<Id>();
        if(!massLeadConvert.isEmpty()) {
            List<Database.LeadConvertResult> lcr = Database.convertLead(massLeadconvert, false);
            // set 'false' to allow converting if no duplicates found
            for(Database.LeadConvertResult each :lcr) {
                for (Database.Error error :each.getErrors()) {
                    if(error instanceof Database.DuplicateError) {
                        Database.DuplicateError duplicateError = (Database.DuplicateError) error;
                        Datacloud.DuplicateResult duplicateResult = duplicateError.getDuplicateResult();
                        Datacloud.MatchResult[] matchResults = duplicateResult.getMatchResults();
                        Datacloud.MatchResult matchResult = matchResults[0];
                        Datacloud.MatchRecord[] matchRecords = matchResult.getMatchRecords();

                        for (Datacloud.MatchRecord matchRecord :matchRecords) {
                            System.debug('MatchRecord: ' + matchRecord.getRecord());
                            System.debug('ID OF MATCH: ' + matchRecord.getRecord().Id);
                        }
                    }
                }
            }
        }
    }
}