# Summary The explanation in the previous lesson can be very overwhelming for practitioners new to BSV, so below is the summary of what we have covered so far: 1. BSV transactions are signed using ECDSA(secp256k1) 2. Transactions can have multiple inputs and outputs; each input has an unlocking script and each output has a locking script 3. The signature and verification within a transaction is instructed via arguments in script 4. The locking scripts, in the transaction outputs, associates the public key of the party, to which custody of funds is transferred 5. The unlocking script, in the transaction inputs, provides a mechanism where the party can provide a signature with the private key associated with the public key or derivativation thereof, that the funds were locked against. 6. BSV transactions use the format \[DER, SIGHASH] instead of $$\[r,s]$$. The sighash flag provides the specifications of the input and output that needs to be signed --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://hub.bsvblockchain.org/higher-learning/bsv-academy/digital-signatures/bsv-and-digital-signatures/summary.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.