Reduce storage requirements by pruning (deleting) old blocks. This mode is incompatible with -txindex and -rescan. Warning: Reverting this setting requires re-downloading the entire blockchain. (default: 0 = disable pruning blocks, >550 = target size in MiB to use for block files)
Rebuild block chain index from current blk000??.dat files on startup
Maintain a full transaction index, used by the getrawtransaction rpc call (default: 0)