feat: add block-size subgraph

Author: isum

block-size-subgraph/.gitignore

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+build/
+generated/
+node_modules/
+
+package-lock.json

block-size-subgraph/abis/BlockDataSource.json

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+[
+  {
+    "anonymous": false,
+    "inputs": [],
+    "name": "BlockDataSource",
+    "type": "event"
+  }
+]

block-size-subgraph/package.json

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+{
+  "name": "block-size-subgraph",
+  "license": "MIT",
+  "scripts": {
+    "codegen": "graph codegen",
+    "build": "graph build",
+    "create-local": "graph create --node http://localhost:8020/ block-size-subgraph",
+    "remove-local": "graph remove --node http://localhost:8020/ block-size-subgraph",
+    "deploy-local": "graph deploy --node http://localhost:8020/ --ipfs http://localhost:5001/ block-size-subgraph"
+  },
+  "devDependencies": {
+    "@graphprotocol/graph-cli": "0.95.0",
+    "@graphprotocol/graph-ts": "0.37.0"
+  }
+}

block-size-subgraph/schema.graphql

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+type BlockSize @entity(immutable: true) {
+    id: ID!
+    number: BigInt!
+    size: BigInt!
+}

block-size-subgraph/src/mapping.ts

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+import { ethereum , BigInt} from "@graphprotocol/graph-ts";
+import { BlockSize } from "../generated/schema";
+
+export function handleBlock(block: ethereum.Block): void {
+    let blockSize = new BlockSize(block.hash.toHex());
+
+    blockSize.number = block.number;
+    if (block.size !== null) {
+        blockSize.size = block.size!;
+    } else {
+        blockSize.size = BigInt.fromU64(0);
+    }
+    blockSize.save();
+}

block-size-subgraph/subgraph.yaml

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+specVersion: 1.3.0
+description: A subgraph that indexes the size of each block.
+schema:
+  file: ./schema.graphql
+dataSources:
+  - kind: ethereum
+    name: BlockDataSource
+    network: mainnet
+    source:
+      address: "0x0000000000000000000000000000000000000000"
+      abi: BlockDataSource
+      startBlock: 10000000
+    mapping:
+      kind: ethereum/events
+      apiVersion: 0.0.7
+      language: wasm/assemblyscript
+      entities:
+        - BlockSize
+      abis:
+        - name: BlockDataSource
+          file: ./abis/BlockDataSource.json
+      blockHandlers:
+        - handler: handleBlock
+      file: ./src/mapping.ts