Chunk getContractEvents into 500 block range

[dylmanning]

Alchemy is limiting fetching block to ranges of 500. Implemented chunking to adhere to this restriction.

{
    "errorType": "BlockchainConnectionError",
    "errorMessage": "Error scanning migrations: HttpRequestError: HTTP request failed.\n\nStatus: 400\nURL: https://arb-mainnet.g.alchemy.com/v2/oo7P8s9OYuw1zhGb0d8YFv21GodCRQYH\nRequest body: {\"method\":\"eth_getLogs\",\"params\":[{\"address\":\"0xb8b47E61188Cc197F36C48B2298cb05afE4332E1\",\"topics\":[\"0x83428582867423cd1eed24ec91dd589c793b9a477e8d567c2bcb1516be10367a\"],\"fromBlock\":\"0x141502f2\",\"toBlock\":\"0x141504ec\"}]}\n\nDetails: {\"code\":-32600,\"message\":\"You can make eth_getLogs requests with up to a 500 block range. Based on your parameters, this block range should work: [0x141502f2, 0x141504e5]\"}\nVersion: viem@2.22.11",
    "name": "BlockchainConnectionError",
    "stack": [
        "BlockchainConnectionError: Error scanning migrations: HttpRequestError: HTTP request failed.",
        "",
        "Status: 400",
        "URL: https://arb-mainnet.g.alchemy.com/v2/oo7P8s9OYuw1zhGb0d8YFv21GodCRQYH",
        "Request body: {\"method\":\"eth_getLogs\",\"params\":[{\"address\":\"0xb8b47E61188Cc197F36C48B2298cb05afE4332E1\",\"topics\":[\"0x83428582867423cd1eed24ec91dd589c793b9a477e8d567c2bcb1516be10367a\"],\"fromBlock\":\"0x141502f2\",\"toBlock\":\"0x141504ec\"}]}",
        "",
        "Details: {\"code\":-32600,\"message\":\"You can make eth_getLogs requests with up to a 500 block range. Based on your parameters, this block range should work: [0x141502f2, 0x141504e5]\"}",
        "Version: viem@2.22.11",
        "    at t.BlockchainConnectionProvider.scanMigrations (/var/task/index.js:18:658956)",
        "    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)",
        "    at async h (/var/task/index.js:18:15860)",
        "    at async t.main (/var/task/index.js:18:15334)",
        "    at async e.handler (/var/task/index.js:18:877096)"
    ]
}

[JoseMiguelHerrera]

Can't believe they just changed this. How often were you running the lambda function? 5 mins? I guess we could speed it up by 4 to get around this, but chunking is defs the proper solution. Reviewing

[JoseMiguelHerrera]

Looks good. I ran a small unit test of the chunking logic and it separates things as expected. Good addition, as it makes us resilient to future block range limits. I guess the only thing that could be added is if the limit could be gotten via API.