After completing these set up steps, we'll be ready to start developing with the UMA system locally.
The following steps require the
git CLI to be installed. If you are on Windows, you can install via Git Bash Shell (link).
Clone the UMA repo. Start in the top-level directory in this repository,
- Install the latest stable version of Node.js and Yarn is installed along with it.
We should be able to compile the smart contracts from
If everything worked, we should see the line "> Compiled successfully using:" in the output.
Ganache-CLI was already installed via
yarn and now we will use it to run a test-chain with this command:
Here, we are running Ganache:
- On localhost port
- Initializing the test accounts with 1000000 ETH
- Setting a maximum gas limit of 10 million
This will make sure we have enough ETH and a high enough gas limit to deploy our larger contracts.
If everything was setup correctly, we should be able to run automated tests from
protocol/core. In a separate terminal, run the following commands from the
These tests will take a while to finish, but if set up correctly, all tests should pass (with the possible exception of a few that depend on the Intrinio API).
Keys and Networks
When using UMA infrastructure, you often have to open the
truffle console or run a script using
truffle exec. When
using truffle in the context of this repository, it's important to understand what types of keys you can use and what
to specify for the
Public networks include the Ethereum mainnet and any public testnets, like Rinkeby, Kovan, or Ropsten. If you are using these networks, you'll generally need to know:
Which public network you intend to use. A list of UMA supported networks is available here.
What private key you want to use and how your private keys are stored. Below is information regarding the two types of keys that are supported, mnemonics/seed phrases and hardware wallets.
--network parameter that's passed to all truffle commands depends on both of these factors. Here's an example:
That command will tell truffle that the user wants to use the Rinkeby testnet and their private key is a mnemonic, or
seed phrase. Generally, the network argument is structured as
Mnemonic, or seed phrase (less secure)
Mnemonics are much less secure than using a hardware wallet, but they are also much faster when sending multiple transactions since they don't require as much user input. If you'd like to use a mnemonic, you'll need to start by putting the mnemonic in your shell environment. Do this by running the following command:
With a real mnemonic, this would look like:
Once you've done that you're ready to run a truffle command. When using a mnemonic, your network argument should look
--network [NETWORK_NAME]_mnemonic. So, for example, using a mnemonic on Kovan would look like:
Hardware wallets (more secure)
Hardware wallets are the more secure way to interact with the system on public networks. We currently only support Ledger hardware wallets, but we plan on supporting more in the future.
To set up a Ledger hardware wallet for use with our system:
Connect the device to your machine.
Use your passcode to unlock it.
Ensure the Ethereum app is installed on your device. Install it if not.
Select the Ethereum app on the device.
Go to the Ethereum app settings on the device and change the "Contract data" setting to yes if it isn't already.
Now that you're set up, you should be able to run truffle commands with the network argument
--network [NETWORK_NAME]_ledger. Note: this network uses the default Ledger Live derivation path:
For the legacy derivation path (
For example, you could connect your ledger wallet to the truffle console and begin running commands against mainnet with the following command:
Note: outgoing transactions will require manual approval on the ledger device. If you fail to approve, the command will hang.