A Typescript wrapper for Index Supply's API.
Make a one-time query to get historical data:
const { blockNumber, result } = await query({
apiKey: "face",
chainId: 8453,
query: 'select "from", "to", value from transfer',
eventSignatures: ['Transfer(address indexed from, address indexed to, uint256 value)'],
formatRow: ([from, to, value]) => ({
from: from as Address,
to: to as Address,
value: BigInt(value),
}),
})
console.log(`Block ${blockNumber}:`, result)Subscribe to new data as it arrives:
const liveQuery = queryLive({
apiKey: "face",
chainId: 8453,
blockNumber: 1234567, // Optional: start from specific block
query: 'select from, to, value from transfer',
eventSignatures: ['Transfer(address indexed from, address indexed to, uint256 value)'],
formatRow: ([from, to, value]) => ({
from: from as Address,
to: to as Address,
value: BigInt(value),
}),
})
for await (const { blockNumber, result } of liveQuery) {
console.log(`New data at block ${blockNumber}:`, result)
}% node --version
v22.12.0
% npm run example
> @indexsupply/[email protected] example
> npx tsx examples/live.ts
{
tx: '0x3f6664da84f4cc2f3bbfd5b9968ea0c06c4d89b682c920ee240f13d9824cbabf',
block: 23815441n
}