generate nblocks ( maxtries )
Mine up to nblocks blocks immediately (before the RPC call returns)
Arguments:
1. nblocks (numeric, required) How many blocks are generated immediately.
2. maxtries (numeric, optional) How many iterations to try (default = 1000000).
Result:
[ blockhashes ] (array) hashes of blocks generated
Examples:
Generate 11 blocks
> bitcoin-cli generate 11