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Skip understanding, an SPV client only keeps a track of the block headers in its own database.
So when a user tries to send bitcoins using that particular SPV client, how is the transaction constructed? A user using that client will probably enter the amount he wants to send and the destination address.
And he probably will be signed in using his private key, Colcrys Generique Paypal. So using these 3 data i. Because I know that if I have to manually write a transaction by hand, I need: So I am just supplying amount, destination and private key.
It will be very helpful, if someone mentions a codebase where the implementation is given, Colcrys Generique Paypal.
Generally speaking, the SPV wallet receives the transaction and a merkle-proof from a validating full-node when funds are sent to an address controlled by the wallet. The merkle-proof guarantees that the transaction with the output spendable by the wallet is committed to the header of its local strong header-chain.
Since the wallet controls the private keys to this output, Colcrys Generique Paypal, it indexes this as a local UTXO, without any knowledge of the full UTXO set found on the validating node. Colcrys Generique Paypal spending funds to another address, the local wallet will solve for an optimal set of local UTXOs for this transaction.
Prevout Points, spendable by the wallet are indexed as mentioned before.
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All other transaction fields you describe are independent of the UTXO, or can be inferred from the indexed previous transaction e. The SPV wallet described above necessarily reveals the addresses it is interested in to receive merkle-proofs from the validating node, Colcrys Generique Paypal. There are several techniques for the SPV client to improve Colcrys Generique Paypal and leak less information, at a certain bandwidth cost.
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With the web and moving of transaction historical past on the net, anonymity has mostly fallen by the wayside.
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