History

Usage: client.platform.contracts.history(identifier, startAtMs, limit, offset)
Description: Fetches the historical changes of a Data Contract by its identifier over time.

Parameters:

Parameters	Type	Required	Description
identifier	string | Identifier	yes	The identifier of the contract to fetch. Can be a string or an Identifier object.
startAtMs	number	yes	Timestamp in milliseconds from which to start fetching the contract history.
limit	number	yes	The maximum number of history entries to return.
offset	number	yes	The number of history entries to skip. Useful for pagination.

Example:

const identifier = 'yourContractIdentifier'; // Your Data Contract identifier.
const startAtMs = Date.now() - (24 * 60 * 60 * 1000); // 24 hours ago
const limit = 10; // Maximum number of history entries to fetch
const offset = 0; // Start from the first entry

const history = await client.platform.contracts.history(identifier, startAtMs, limit, offset);

if (history) {
  console.log('Contract history:', history);
} else {
  console.log('Contract not found or no history available.');
}

Returns: An object where keys are timestamps of the contract updates and values are the DataContract objects representing the state of the contract at that time. Returns null if the contract or its history cannot be found.