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DigitalBits-core is a replicated state machine that maintains a local copy of a cryptographic ledger and processes transactions against it, in consensus with a set of peers. It implements the Stellar Consensus Protocol, a federated consensus protocol. It is written in C++11 and runs on Linux, OSX and Windows. Learn more by reading the overview document.


Documentation of the code's layout and abstractions, as well as for the functionality available, can be found in ./docs.


See Installation


See Contributing

Reporting issues

Software has bugs, or maybe you have an idea for a change in digitalbits-core.


  1. do a search of issues in case there is one already tracking the one you ran into.
  2. search open issues (not addressed yet) using the filter is:open (default). If you have new information, include it into the issue.
  3. search closed issues by removing the is:open filter. Two possibilities here:
    • the issue was resolved in a newer version - then you just need to install the version with the fix
    • the issue was closed for some reason. You may decide to reopen it depending on context. Make sure to explain why the issue should be re-opened.

For bugs being opened/re-opened, simply paste and fill the into the issue.

Running tests

run tests with: src/digitalbits-core --test

run one test with: src/digitalbits-core --test testName

run one test category with: src/digitalbits-core --test '[categoryName]'

Categories (or tags) can be combined: AND-ed (by juxtaposition) or OR-ed (by comma-listing).

Tests tagged as [.] or [hide] are not part of the default test test.

supported test options can be seen with src/digitalbits-core --test --help

display tests timing information: src/digitalbits-core --test -d yes '[categoryName]'

xml test output (includes nested section information): src/digitalbits-core --test -r xml '[categoryName]'

Running tests against postgreSQL

There are two options. The easiest is to have the test suite just create a temporary postgreSQL database cluster in /tmp and delete it after the test. That will happen by default if you run make check.

You can also create a temporary database cluster manually, by running ./src/test/selftest-pg bash to get a shell, then running tests manually. The advantage of this is that you can examine the database log in $PGDATA/pg_log/ after running tests, as well as manually inspect the database with psql.

Finally, you can use an existing database cluster so long as it has databases named test0, test1, ..., test9, and test. Do set this up, make sure your PGHOST and PGUSER environment variables are appropriately set, then run the following from bash:

for i in $(seq 0 9) ''; do
    psql -c "create database test$i;"

Running stress tests

We adopt the convention of tagging a stress-test for subsystem foo as [foo-stress][stress][hide].

Then, running

  • digitalbits-core --test [stress] will run all the stress tests,
  • digitalbits-core --test [foo-stress] will run the stress tests for subsystem foo alone, and
  • neither digitalbits-core --test nor digitalbits-core --test [foo] will run stress tests.


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