Use LocalCache per default

[ineiti]

When a new byzcoinrpc is instantiated, it uses a LocalCache if no DB is given.

Closes #2416

[cgrigis]

I see that the tests pass on Travis, but when I try to npm test locally on the branch, with byzcoin-rpc.spec.ts fdescribe-ed, I get these errors:

1. ByzCoinRPC Tests
=== starting conodes ===
Check output.log for the logs
=== conodes started ===

.   ✔ should create an rpc and evolve/spawn darcs (2420ms)
.   ✔ should create an rpc and get it from byzcoin (70ms)
E : byzcoin-rpc.ts:82:46           -> couldn't getUpdates {Array}: Error: Endpoint terminated the connection due to a protocol error. Reason: unexpected error: processing request: processing error: cannot find skipblock while getting proof,Error: Endpoint terminated the connection due to a protocol error. Reason: unexpected error: processing request: processing error: cannot find skipblock while getting proof
F   ✖ should use a LocalCache when no DB is given (1 failure) (111ms)
.   ✔ should throw an error for non-existing instance or wrong type (59ms)
E : byzcoin-rpc.ts:82:46           -> couldn't getUpdates {Array}: Error: Endpoint terminated the connection due to a protocol error. Reason: unexpected error: processing request: processing error: cannot find skipblock while getting proof,Error: Endpoint terminated the connection due to a protocol error. Reason: unexpected error: processing request: processing error: cannot find skipblock while getting proof
F   ✖ should get updated when an instance is updated (1 failure) (54ms)

Failed Specs:

1. ByzCoinRPC Tests : should use a LocalCache when no DB is given
   Error: Error: Endpoint terminated the connection due to a protocol error. Reason: unexpected error: processing request: processing error: cannot find skipblock while getting proof,Error: Endpoint terminated the connection due to a protocol error. Reason: unexpected error: processing request: processing error: cannot find skipblock while getting proof
       at ByzCoinRPC.<anonymous> /home/cgrigis/C4DT/Projects/cothority/external/js/cothority/src/byzcoin/byzcoin-rpc.ts:82:46
       at <Jasmine>
       at rejected /home/cgrigis/C4DT/Projects/cothority/external/js/cothority/node_modules/tslib/tslib.js:108:69

2. ByzCoinRPC Tests : should get updated when an instance is updated
   Error: Error: Endpoint terminated the connection due to a protocol error. Reason: unexpected error: processing request: processing error: cannot find skipblock while getting proof,Error: Endpoint terminated the connection due to a protocol error. Reason: unexpected error: processing request: processing error: cannot find skipblock while getting proof
       at ByzCoinRPC.<anonymous> /home/cgrigis/C4DT/Projects/cothority/external/js/cothority/src/byzcoin/byzcoin-rpc.ts:82:46
       at <Jasmine>
       at rejected /home/cgrigis/C4DT/Projects/cothority/external/js/cothority/node_modules/tslib/tslib.js:108:69

Any idea why?

[ineiti]

Any idea why?

did you make docker in the git-root?

[cgrigis]

did you make docker in the git-root?

Nope, missed that one, thank you. :) Must have been using an old incompatible docker then.

All good!

[cgrigis]

LGTM