Tinydancer is the first light client for the Solana blockchain.
Diet RPC Node

Diet RPC Node


The diet client has to request specific shreds and block headers from the full nodes, in order to do that we have to implement a RPC node that can communicate with the light client using the JSON RPC API.

We added two new methods to the RPC node:

Get block headers method get_block_headers

Returns the requested block header by the slot number and block configuration

Input params:

  • Slot
  • RpcBlockConfig


  • BlockHeader

Block Header type

pub struct BlockHeader {
    pub vote_signature: Vec<Option<String>>,
    pub validator_identity: Vec<Option<Pubkey>>,
    pub validator_stake: Vec<Option<u64>>,

Get shreds method get_shreds

Returns the requested shreds upon call filtered by the slot number and indices

Input params:

  • Slot
  • Shred Indices


curl http://localhost:8899 -X POST -H "Content-Type: application/json" -d '
  {"jsonrpc": "2.0","id":1,"method":"getShreds","params":[1,[0,1,2] ]}


  • Vec<Option<Shred>>

Steps to build and run the RPC node


Note: In the future once merkle shreds are enabled on devnet and testnet, the node will be able to run on the respective networks, but for now you will have to rely on the solana-test-validator

Clone the repo

git clone https://github.com/tinydancer-io/diet-rpc-validator.git

Build the binary

cargo build --release

Run the test validator