Travis and readme

.travis.yml

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+dist: bionic
+language: rust
+rust:
+  - stable
+env:
+  global:
+    - NODE_VERSION="v14.7.0"
+    - SOLANA_VERSION="v1.7.8"
+git:
+  submodules: true
+
+_defaults: &defaults
+  before_install:
+  - nvm install $NODE_VERSION
+  - npm install -g ts-mocha
+  - sudo apt-get install -y pkg-config build-essential libudev-dev
+  - sh -c "$(curl -sSfL https://release.solana.com/${SOLANA_VERSION}/install)"
+  - export PATH="/home/travis/.local/share/solana/install/active_release/bin:$PATH"
+  - export NODE_PATH="/home/travis/.nvm/versions/node/${NODE_VERSION}/lib/node_modules/:${NODE_PATH}"
+  - yes | solana-keygen new
+  - yarn
+
+jobs:
+  include:
+    - <<: *defaults
+      name: Builds and runs the tests
+      script:
+        - yarn test

README.md

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+# Assert Balances
+
+Assert Balances can be used as an additional safety check by wallets and other apps
+to ensure the outcome of a given transaction is as expected. One can
+insert into the end of a transaction an instruction that calls this program,
+asserting that balances are greater than or equal to some expected amount. If a
+transaction ends up changing balances more than expected, it will abort.
+
+## Developing
+
+### Build
+
+[Anchor](https://github.com/project-serum/anchor) is used for developoment, and it's
+recommended workflow is used here. To get started, see the [guide](https://project-serum.github.io/anchor/getting-started/introduction.html).
+
+```bash
+anchor build
+```
+
+### Run the Test
+
+Run the tests
+
+```
+anchor test
+```