radiofreejohn / ethereum-blocks

Subgraph to index blocks but only keep a limited history to save on storage costs

Ethereum Blocks Subgraph

A clone of an already great blocks subgraph, but this one prunes history so you only store the latest block, but can use time travel queries to get block information for N blocks in the past that are automatically pruned.

Querying

Latest Block

{
  block(id:"latest_block"){
    id
    number
    timestamp
  }
}

Historic Blocks as old as N blocks (defined by prune configuration in subgraph.yaml)

{
  blocks(block: { number: 404100 }){
    id
    number
    timestamp
  }
}

Building

yarn install && yarn codegen && yarn build

Configurerd to deploy to Goldsky, but should work with other subgraph providers.

Configuration

Make sure to edit:

• prune: set this to the number of blocks to keep behind the head block of the chain, I refer to this as N. Graph Node by default stores N * 1.2 blocks of history before pruning.
• startBlock: this can be the most recent block to make indexing fast, or the startBlock-N blocks to index the past N blocks.
• network: this should work on any EVM network, so change the network to match the network you want to index blocks for.