Bitcoin duplicate transactions. May 12, 2025 · While the Bitcoin (BTC) collaborator community has discussed changes to the Bitcoin Core client and elimination of restrictions on the OP_Return transaction, developer Ruben Somsen shows a potential obstacle to the protocol. The issue is still not 100% fixed, with the next potential duplicate arising These transactions had the same inputs (none) and the same outputs (one 50 BTC output to the specified address). When you initially make a transaction, it’s an unconfirmed, or pending, transaction waiting to be included in a block. Once an Jan 16, 2017 · Can someone explain what does this mean: As i see: 2 transactions are having SAME txid and differ just by address. Duplicate transactions are more than one transaction that are identical and have identical txids. Duplicate transactions have the potential to cause confusion and Bitcoin developers have been fighting against them for years, in various ways. BIP-30 was created by Peter Wuille and activated in 2012. This issue has been detected and linked to proposed Bitcoin 30 (BIP-30) improvements on duplicate transaction rules, which could generate risk in unlikely scenarios of Aug 10, 2025 · Unless a hash collision occurs, it is impossible for duplicate transaction IDs to appear, and hash collisions have never occurred in Bitcoin or any other system. Source Feb 19, 2018 · Visa and Worldpay had to make a statement that some duplicate Bitcoin transactions on Coinbase, a cryptocurrency exchange, were their fault and not Coinbase’s. However, this does cause a problem when you're trying to work with transaction data, as the transaction hashes cannot be considered unique identifiers of a transaction.
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