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1. bdk bdk Public

   Forked from bitcoindevkit/bdk

   A modern, lightweight, descriptor-based wallet library written in Rust!

   Rust

2. bitcoin bitcoin Public

   Forked from bitcoin/bitcoin

   Bitcoin Core integration/staging tree

   C++

3. SHA256 SHA256 Public

   SHA-256 implementation in C

   C

4. base58 base58 Public

   a repo to store base58's courses files

   Python

5. ecdsa-sign-verify.py ecdsa-sign-verify.py

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   '''

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   A simple example illustrating  

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   message signing and signature

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   verification using secp256k1

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   '''

6. create a transaction with a OP_RETUR... create a transaction with a OP_RETURN output

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   #!/usr/bin/python3

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   '''

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   this script takes in an PSBT and adds an 

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   OP_RETURN output (OP_RETURN OP_PUSHDATA1 <len(message)> <message>)