added change for snapshots

[dabasov]

Fixes

Closes https://github.com/0chain/0chain/issues/903 Closes https://github.com/0chain/0chain/issues/910 Closes https://github.com/0chain/0chain/issues/1529

Changes

Need to be mentioned in CHANGELOG.md?

Tests

Tasks to complete before merging PR:

• [ ] Ensure system tests are passing. If not Run them manually to check for any regressions :clipboard:
• [ ] Do any new system tests need added to test this change? do any existing system tests need updated? If so create a PR at 0chain/system_test
• [ ] Merge your system tests PR to master AFTER merging this PR

Associated PRs (Link as appropriate):

• blobber:
• gosdk:
• system_test:
• zboxcli:
• zwalletcli:
• Other: ...

[codecov-commenter]

Codecov Report

Merging #1475 (e28e304) into staging (288268c) will decrease coverage by 0.39%. The diff coverage is 22.35%.

@@             Coverage Diff             @@
##           staging    #1475      +/-   ##
===========================================
- Coverage    27.07%   26.67%   -0.40%     
===========================================
  Files          346      350       +4     
  Lines        56982    58545    +1563     
===========================================
+ Hits         15426    15615     +189     
- Misses       39695    41066    +1371     
- Partials      1861     1864       +3     

Flag	Coverage Δ
Unit-Tests	26.67% <22.35%> (-0.40%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...ode/go/0chain.net/chaincore/block/block_eventdb.go	0.00% <0.00%> (ø)
code/go/0chain.net/chaincore/block/entity.go	48.17% <0.00%> (-0.07%)	:arrow_down:
code/go/0chain.net/chaincore/chain/state.go	4.39% <0.00%> (-0.22%)	:arrow_down:
...e/go/0chain.net/smartcontract/dbs/event/blobber.go	0.00% <0.00%> (ø)
...n.net/smartcontract/dbs/event/blobber_aggregate.go	0.00% <0.00%> (ø)
...in.net/smartcontract/dbs/event/blobber_snapshot.go	0.00% <0.00%> (ø)
...ode/go/0chain.net/smartcontract/dbs/event/block.go	0.00% <0.00%> (ø)
...go/0chain.net/smartcontract/dbs/event/challenge.go	0.00% <0.00%> (ø)
...ode/go/0chain.net/smartcontract/dbs/event/event.go	0.00% <0.00%> (ø)
...e/go/0chain.net/smartcontract/dbs/event/eventdb.go	8.19% <0.00%> (-4.00%)	:arrow_down:
... and 49 more

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[service-0chain]

Manual system tests [failure] with the following config

config	value
tests skipped	FALSE
system-tests	master
gosdk	NOT OVERRIDDEN
zboxcli	staging
zwalletcli	staging
0chain	feature/snapshots
blobber	staging
authorizer	staging
0box	staging
0block	staging
0dns	staging
explorer	master
0proxy	staging
0search	staging

[service-0chain]

Manual system tests [cancelled] with the following config

config	value
tests skipped	FALSE
system-tests	master
gosdk	NOT OVERRIDDEN
zboxcli	staging
zwalletcli	staging
0chain	feature/snapshots
blobber	staging
authorizer	staging
0box	staging
0block	staging
0dns	staging
explorer	master
0proxy	staging
0search	staging

[service-0chain]

Manual system tests [success] with the following config

config	value
tests skipped	FALSE
system-tests	master
gosdk	NOT OVERRIDDEN
zboxcli	staging
zwalletcli	staging
0chain	feature/snapshots
blobber	staging
authorizer	staging
0box	staging
0block	staging
0dns	staging
explorer	master
0proxy	staging
0search	staging