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kcalvinalvin/README.md

👋 Hi I'm Calvin 👋

I am an open source developer based in Seoul that works on scaling Bitcoin.

Nowadays I'm usually:

  • Working on utreexod, a Bitcoin full node with Utreexo accumulators
  • Working on utreexo, a dynamic hash-based accumulator for Bitcoin
  • Working on btcd, a bitcoin implementation in Go
  • Being a water deer

If you'd like to talk/grab a coffee with me or send me pictures of cute water deers, I'm reachable at calvin@calvinkim.info!

Pinned Loading

  1. utreexo/utreexod Public

    A fully validating Bitcoin node with Utreexo support

    Go 103 28

  2. utreexo/utreexo Public

    A hash based dynamic accumulator

    Go 57 11

  3. Utreexo algorithms
    1 
    # Add
    2 
    
              
    
              
    
                3
                
    Utreexo accumulator is a collection of proper merkle trees. All the merkle trees
    
              
    
              
    
                4
                
    have 2 children or none.
    
              
    
              
    
                5
                
    
              
    
          
    
    
    
  
    

    4. 

      
  4. 
  
    
    
    
      
    
        
    
            
          btcsuite/btcd            Public
        
    
      
    


      
    
        An alternative full node bitcoin implementation written in Go (golang)
      
    

      
    
          
  
  Go


          
            
    

            6.4k
          
          
            
    

            2.4k
          
      
    
    
    
  
    

    5. 

      
  5. 
  
    
    
    
      
    
        
    
            
          vinteumorg/Floresta            Public
        
    
      
    


      
    
        A fully-validating Bitcoin node powered by Utreexo, with an integrated Electrum Server
      
    

      
    
          
  
  Rust


          
            
    

            224
          
          
            
    

            59
          
      
    
    
    
  
    

    6. 

      
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          utreexo/pytreexo            Public
        
    
      
    


      
    
        Minimal utreexo library in python
      
    

      
    
          
  
  Python


          
            
    

            10
          
          
            
    

            2
          
      
    
    
    
  
    

    7. 












      

  

    

  




  


    

      727
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        in the last year
    


    

      

        



  

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              Learn how we count contributions
          


          

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            Activity
              overview
          

          
  

    
    

      Contributed to
        utreexo/utreexod,
        utreexo/utreexo,
        btcsuite/btcd
        
          and 20 other
          repositories
        
    

  



        


          

            

  

    
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      A graph representing kcalvinalvin's contributions from
      April 14, 2024 to April 15, 2025. The contributions are 71% commits, 26% pull requests, 2% code review, 1% issues.
      
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
      
    
  


          

      

  


    





      

          
  

    
  


  

    Contribution activity
  



  


  

    

      April 2025
    


    
  

  
  

  
      
    

                
            Created 14
            commits in
            2
            repositories
          
          
            
            
          

      








    


      

  
  

  
    

      

        Created a pull request in utreexo/utreexo that received 1
        comment
      

      
        
    


    

        
      

        

          prove, testdata: add caching scheduler
        


          

            
CachingScheduleTracker takes in block summary information and is able to
generate a clairvoyant caching schedule. The code included here is the
cod…

          


        

            
              
                +384
              
              
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              •
            
          1
          comment
        

      

    







    
  

  
  

  
      
    

                
            Opened 6
            other
            pull requests in
            2
            repositories
          
          
            
            
          

      
          
  
    

      
      
      





  
    

      
      












    
  

  
  

  
      
    

                
            Reviewed 1
            pull request in
            1
            repository
          
          
            
            
          

      
          

            
  
    

            

        btcsuite/btcd
        
          1 pull request
        
        
          
          
        
      


      
      





          












    


    

    


    





    
  








    
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