Cacher is the code snippet organizer for pro developers

gareth@gareth-pc ~/g/zcash> ./zcutil/fetch-params.sh
Zcash - fetch-params.sh

This script will fetch the Zcash zkSNARK parameters and verify their
integrity with sha256sum.

If they already exist locally, it will exit now and do nothing else.
The complete parameters are currently just under 1.7GB in size, so plan 
accordingly for your bandwidth constraints. If the Sprout parameters are
already present the additional Sapling parameters required are just under 
800MB in size. If the files are already present and have the correct 
sha256sum, no networking is used.

Creating params directory. For details about this directory, see:
/home/gareth/.zcash-params/README


Retrieving (ipfs): /ipfs/QmZKKx7Xup7LiAtFRhYsE1M7waXcv9ir9eCECyXAFGxhEo/sprout-proving.key
Saving file(s) to /home/gareth/.zcash-params/sprout-proving.key.dl
 868.01 MiB / 868.01 MiB [===============================================================================================================================================] 100.00% 35m53s
Download successful!
/home/gareth/.zcash-params/sprout-proving.key.dl: OK
renamed '/home/gareth/.zcash-params/sprout-proving.key.dl' -> '/home/gareth/.zcash-params/sprout-proving.key'

Retrieving (ipfs): /ipfs/QmZKKx7Xup7LiAtFRhYsE1M7waXcv9ir9eCECyXAFGxhEo/sprout-verifying.key
Saving file(s) to /home/gareth/.zcash-params/sprout-verifying.key.dl
 1.42 KiB / 1.42 KiB [=======================================================================================================================================================] 100.00% 0s
Download successful!
/home/gareth/.zcash-params/sprout-verifying.key.dl: OK
renamed '/home/gareth/.zcash-params/sprout-verifying.key.dl' -> '/home/gareth/.zcash-params/sprout-verifying.key'

Retrieving (ipfs): /ipfs/QmZKKx7Xup7LiAtFRhYsE1M7waXcv9ir9eCECyXAFGxhEo/sapling-spend.params
Error: no link named "sapling-spend.params" under QmZKKx7Xup7LiAtFRhYsE1M7waXcv9ir9eCECyXAFGxhEo

Failed to fetch the Zcash zkSNARK parameters!
Try installing one of the following programs and make sure you're online:

 * ipfs
 * wget
 * curl