Producing Blocks

You can force-produce blocks using the produceBlocks helper to achieve an arbitrary block height. This is especially useful when you want to do some testing regarding transaction maturity.

const provider = await Provider.create(FUEL_NETWORK_URL);

const block = await provider.getBlock('latest');
if (!block) {
  throw new Error('No latest block');
}
const { time: timeLastBlockProduced } = block;

const amountOfBlocksToProduce = 3;
const producedBlockHeigh = await provider.produceBlocks(amountOfBlocksToProduce);

const producedBlock = await provider.getBlock(producedBlockHeigh.toNumber());

expect(producedBlock).toBeDefined();

const oldest: Date = DateTime.fromTai64(timeLastBlockProduced);
const newest: Date = DateTime.fromTai64(producedBlock?.time || DateTime.TAI64_NULL);

expect(newest >= oldest).toBeTruthy();

See code in context

---

Producing Blocks With Custom Timestamps

You can also produce blocks with a custom block time using the produceBlocks helper by specifying the second optional parameter.

const lastBlockTimestamp = DateTime.fromTai64(latestBlock.time).toUnixMilliseconds();
const latestBlockNumber = await provider.produceBlocks(3, lastBlockTimestamp + 1000);

See code in context