Substrate SQD Network API
The Substrate API of SQD Network is currently in beta. Breaking changes may be
introduced in the future releases.
firstBlock (can be the genesis block) and ending at the highest available block. Proceed as follows:
-
Retrieve the dataset height from the router with
GET /height and make sure it’s above firstBlock.
-
Save the value of
firstBlock to some variable, say currentBlock.
-
Query the router for an URL of a worker that has the data for
currentBlock with GET /$\{currentBlock\}/worker.
-
Retrieve the data from the worker by posting the query (
POST /), setting the "fromBlock" query field to $\{currentBlock\}.
-
Parse the retrieved data to get a batch of query data plus the height of the last block available from the current worker. Take the
header.number field of the last element of the retrieved JSON array - it is the height you want. Even if your query returns no data, you’ll still get the block data for the last block in the range, so this procedure is safe.
-
Set
currentBlock to the height from the previous step plus one.
-
Repeat steps 3-6 until all the required data is retrieved.
Main URLs of EVM gateways are available on the Supported networks page.
Implementation example:
Router API
Worker API
