Configure the Bridge Client


The EVM compatible sidechain implementation is a proof of concept extension to the XRP Ledger protocol and is for development purposes only. There is no official amendment currently and it is not available on the production Mainnet. The EVM compatible sidechain bridge is connected to the XRP Ledger Devnet. Do not send transactions in Mainnet.

The client requires separate configuration files for the backend frontend. Each environment setting also requires its own configuration files.

Backend Configuration

The client backend is configured in src/config. The folder holds multiple files that configure properties related to the:

  • Server
  • Logger
  • Database (TypeORM)
  • EVM
  • XRPL
  • XUMM

These configuration files use the buildConfig() function, taking an object with the configuration properties and a second optional parameter to perform validations. Configuration properties can have a static value or an object specifying values for each environment. The following environments are available:

  • default
  • production
  • development
  • test
  • staging

Configuration values can be constants, environment variables or AWS Secrets. Environment variables are defined in a .env file in the root of the backend. AWS Secrets add an extra layer of customisation and security. To load AWS secrets, the AWS_REGION and AWS_SECRET_ID environment variables must be defined.

Warning: Never use constants for sensitive data, such as keys or secrets in production environments.

Server Options

Key Description EVN Key AWS Secret Example
port Server port to receive requests. APP_PORT 3000
enableSwagger Enable Swagger. true
enableCor Enable CORS. true

Logger Options

Key Description EVN Key AWS Secret Example
logLevel Log level used by the server logger. "info"
logFileName File name to store logs. "app.log"

Database (TypeORM) Options

Key Description EVN Key AWS Secret Example
host Database host. DB_HOST DB_HOST "db"
port Database port. DB_PORT DB_PORT 5432
username Database username. DB_USER DB_USER "db_user"
password Database password. DB_PASSWORD DB_PASSWORD "db_password"
database Database name. DB_DATABASE DB_DATABASE "db_database"

Note: This configuration also extends Nest TypeORM properties.

EVM Option

Key Description EVN Key AWS Secret Example
server EVM chain RPC. ""

XRPL Option

Key Description EVN Key AWS Secret Example
server XRPL chain WebSocket. "wss://"

XUMM Options

Key Description EVN Key AWS Secret Example
appKey XUMM app key. XUMM_API_KEY XUMM_API_KEY "aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"
appSecret XUMM app secret. XUMM_SECRET_KEY XUMM_SECRET_KEY "aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"

Frontend Configuration

The frontend configuration doesn't contain sensitive data and can be modified at src/common/config. There's one JSON file for each environment:

File Description
config.base.json Common configuration used in all environments. Configuration used in the production environment. Configuration used in the development environment.
config.test.json Configuration used in the test environment.
config.staging.json Configuration used in the staging environment.

Configuration Options

Key Description Example
projectName The name of the project. "bridge-client"
publicUrl React Router's BrowserRouter basename. "/"
backendUrl Bridge client backend URL. ""
nativeToken The symbol of the blockchain's native token. "XRP"
network The network of the chains in the bridge. "Devnet"
xrpNodeUrl XRPL node WebSocket URL. "wss://"
evmWsNodeUrl EVM node WebSocket URL. "wss://"
evmRpcUrl EVM node RPC URL. ""
xrpExplorerUrl XRPL explorer URL. ""
evmExplorerUrl EVM explorer URL. ""
xrpFaucetHost XRPL faucet host. ""
xrpChainName XRP chain name. "XRPL"
evmChainName EVM chain name. "EVM Sidechain"
evmChain EVM chain ID. 1440002
evmDecimals EVM chain decimals. 18
pctCommission PCT commission. 0
minCommission Minimum commission. 1
maxCommission Maximum commission. 1
xumm The XUMM configuration options.
enableXumm Enable a XUMM. Uses an auto-generated XRP faucet wallet if false. false
maxNumberDecimals Maximum number of decimals to display in the UI. 6
txValidationPolling Polling Options for awaiting transaction validations.
attestationsValidationPolling Polling Options for awaiting attestations.
transactionsRefetchInterval The interval to refetch transaction history in ms. 10000
balanceRefetchInterval The interval to refetch balances in ms. 5000
peersystUrl The Peersyst web page URL. ""

Frontend XUMM Options

Key Description Example
statusInterval The interval to poll the client's backend for XUMM request updates in ms. 3000
maxNumberOfRetries The maximum number of attempts to poll the client's backend for XUMM request updates. 40

Polling Options

Key Description Example
delay Polling delay in ms. 3000
maxIterations The maximum number of polling iterations. 10
timeout The timeout of the request being polled in ms. 1000