1，ipfs 下载lotus复制证明文件v25
# pwd
/storage/filecoin-proof-parameters-v25
# ipfs get QmZGUrRFbNjt3DVrzRRjiGH9GnZPWVHvwuRRhpJTzAHKwn
Saving file(s) to QmZGUrRFbNjt3DVrzRRjiGH9GnZPWVHvwuRRhpJTzAHKwn
22.99 MiB / 107.23 GiB [>--------------------------------------------------------------------------------------------------------------------------------------] 0.02% 20d10h57m19s
# ls -lh
总用量 4.0K
drwxr-xr-x 2 root root 4.0K 4月 16 15:18 QmZGUrRFbNjt3DVrzRRjiGH9GnZPWVHvwuRRhpJTzAHKwn
# cd QmZGUrRFbNjt3DVrzRRjiGH9GnZPWVHvwuRRhpJTzAHKwn/
# ls -lh
总用量 11M
-rw-r--r-- 1 root root 20 4月 16 15:18 v25-proof-of-spacetime-fallback-MerkleTree<PoseidonHasher, 8, 0, 0>-0170db1f394b35d995252228ee359194b13199d259380541dc529fb0099096b0.meta
-rw-r--r-- 1 root root 11M 4月 16 15:21 v25-proof-of-spacetime-fallback-MerkleTree<PoseidonHasher, 8, 0, 0>-0170db1f394b35d995252228ee359194b13199d259380541dc529fb0099096b0.params
