What do we call the evidence that a light node receives from a full node to verify its account status?
Question: What do we call the evidence that a light node receives from a full node to verify its account status?
The evidence that a light node receives from a full node to verify its account status is called a Merkle proof. A Merkle proof is a cryptographic proof that shows that a transaction is included in a block.
Light nodes use Merkle proofs to verify the state of their accounts without having to download the entire blockchain. This is possible because the Merkle proof contains all the information that a light node needs to verify the validity of a transaction, such as the hash of the transaction and the hashes of all the other transactions in the block.
To verify its account status, a light node will request a Merkle proof from a full node for the transaction that it wants to verify. The full node will then send the light node a Merkle proof for the transaction. The light node can then use the Merkle proof to verify that the transaction is included in a block and that the block is valid.
Here is an example of how a light node uses a Merkle proof to verify its account status:
- The light node sends a request to a full node for a Merkle proof for a specific transaction.
- The full node sends the light node a Merkle proof for the transaction.
- The light node verifies the Merkle proof by checking the hash of each transaction hash in the Merkle proof.
- Once the light node has verified the Merkle proof, it can be sure that the transaction is included in a block and that the block is valid.
By using Merkle proofs, light nodes can verify the state of their accounts and their account status without having to download the entire blockchain. This makes light nodes much more efficient and scalable than full nodes.
Note: The Merkle proof is not the same as the header chain that I mentioned in my previous response. The header chain is a subset of the full blockchain that contains the block headers of all the blocks in the blockchain. The Merkle proof is a cryptographic proof that shows that a transaction is included in a block.
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