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I have sent a Bitcoin amount to someone who wants the transaction ID. What is this? Is it the hash shown on the LHS of the transaction?

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  • What client software are you using? Aug 6, 2014 at 3:21
  • I do not know what you mean by "client software" but for what it is worth I am using the blockchain wallet system.
    – Graeme
    Aug 6, 2014 at 3:29
  • Via the website, the mobile app, or something else? Aug 6, 2014 at 3:33
  • via the website
    – Graeme
    Aug 6, 2014 at 3:42

1 Answer 1

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Transaction ID usually refers to the 2xSHA256 hash of the transaction serialized as it would have been transferred in the network. This is also the ID as peers refer to them when broadcasting through the network.

Notice that due to transaction malleability a transaction may have multiple IDs.

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