# Configure

When you run Redspot, it will search for the closest redspot.config.js file starting from the current working directory. This file is usually located in the root directory of the project.

This file contains the entire Redspot setup (e.g. configuration, plugins, custom tasks, etc.).

# Configuration options

To set the configuration, you need to export the object (object) from redspot.config.ts.

import { RedspotUserConfig } from 'redspot/types';

export default {
  defaultNetwork: 'development',
  contract: {
    ink: {
      toolchain: 'nightly',
      sources: ['contracts/**/*']
    solang: {
      sources: ['contracts/**/*.sol']
  networks: {
    development: {
      endpoint: 'ws://',
      types: {},
      gasLimit: '400000000000'
    substrate: {
      endpoint: 'ws://',
      gasLimit: '400000000000',
      accounts: ['//Alice', "tomato mad peasant blush poem obtain inspire distance attitude mercy return marriage", " 0x26aa394eea5630e07c48ae0c9558cef70a98fdbe9ce6c55837576c60c7af3850"],
      types: {}
  paths: {
    artifacts: "artifacts",
    tests: "tests"
  mocha: {
    timeout: 60000
} as RedspotUserConfig;

The configuration information can be obtained in the js file via ``config`''.

import { config } from "redspot"


# defaultNetwork

You can customize the network that is used by default when running Redspot by using the defaultNetwork field in the configuration. If this configuration is omitted, the default value is localhost.

# networks

The networks configuration field is an optional object to which the network name maps to its configuration.

The default configuration for localhost is :

  localhost: {
    gasLimit: "400000000000",
    accounts: ["//Alice", "//Bob", "//Charlie", "//Dave", "//Eve", "//Ferdie"],
    endpoint: "ws://",
    types: {}

Other network names can also be configured, e.g. configure mainnet, the name of a particular network some_network_name, etc.

    mainnet: {
    some_network_name: {

The following configuration options are described for the network section.

# [network].gasLimit

This configuration is used to set the default value of gaslimit that needs to be provided when instantiating or invoking a contract via a transaction. This value must be an integer, with no precision.

If this value is too small, you will get a contracts.OutOfGas error. The maximum gaslimit is the maximum value used for DispatchClass::Normal in Runtime for this Substrate's chain. (For example, in the configuration of Substrate's node node is NORMAL_DISPATCH_RATIO * MAXIMUM_BLOCK_WEIGHT = 75% * 2000000000000).

So it is generally recommended to set it higher.

# [network].accounts

accounts should be set by suri (opens new window) or KeyringPair (opens new window) start/create/#adding-a-pair).

The accounts default to ["//Alice", "//Bob", "//Charlie", "//Dave", "//Eve", "//Ferdie"].

See runtime-environment for details

# [network].endpoint

endpoint specifies the node in the current network configuration that the developer wants to connect to.

Currently, only WebSockets type RPC connections are supported (i.e. only link protocols starting with wss:// or ws:// are supported).

# [network].types

type is a concept defined in polkadotjs. If there is any doubt about this, you can see it here at types.extend (opens new window). You can also set [network].typesbundle, [network].typesSpec, etc. Usually, if you get an error like "No such variant in enum MultiSignature", you should probably consider adding { Address: "AccountId", LookupSource: "AccountId"}, see impact-on-extrinsics (opens new window) .

# contract

In the contract, you can set the compiler options, currently ink (opens new window) and solang (opens new window) are supported. You can also compile the ink contract and the solang contract together under the same project.

See the example of compiling multiple contracts at .

# [contract].ink.toolchain

Set the toolchain used by cargo-contract (opens new window) when compiling contracts. You can also specify nightly-YYYY-MM-DD

# [contract].ink.sources

Sets the directory of the ink contract to look for at compile time. glob syntax.

# [contract].solang.sources

Set the directory of the solang contract to be looked up at compile time. glob syntax.

# Paths

paths sets the directory name for artifacts and tests files. Normally, you don't need to change this.

# mocha

Redspot uses mocha as its testing framework, and all of the options here will be passed to mocha. Check out for more details.