An instant, zero-config Terra blockchain and ecosystem.

What is LocalTerra?

LocalTerra is a complete Terra testnet and ecosystem containerized with Docker and orchestrated with a simple docker-compose file. It simplifies the way smart-contract developers test their contracts in a sandbox before they deploy them on a testnet or mainnet.

LocalTerra comes preconfigured with opinionated, sensible defaults for standard testing environments. If other projects mention testing on LocalTerra, they are referring to the settings defined in this repo.

LocalTerra has the following advantages over a public testnet:

• Easily modifiable world states
• Quick to reset for rapid iterations
• Simple simulations of different scenarios
• Controllable validator behavior

Prerequisites

• Docker
• docker-compose
• Supported known architecture: x86_64
• 16+ GB of RAM is recommended (for 8+ GB, Bombay testnet is recommended)

Install LocalTerra

1. Run the following commands::

$ git clone --depth 1 https://www.github.com/terra-money/LocalTerra
$ cd LocalTerra

2. Make sure your Docker daemon is running in the background and docker-compose is installed.

Start, stop, and reset LocalTerra

• Start LocalTerra:

$ docker-compose up

Your environment now contains:

• terrad RPC node running on tcp://localhost:26657
• LCD running on http://localhost:1317
• FCD running on http://localhost:3060
• An oracle feeder feeding live prices from mainnet, trailing by one vote period

Stop LocalTerra:

$ docker-compose stop

Reset the world state:

$ docker-compose rm

Integrations

You can integrate LocalTerra in Terra Station, terrad, and the Terra JavaScript and Python SDKs.

Terra Station

Terra Station has built-in support for LocalTerra so that you can quickly and easily interact with it. Open Station, and switch to the Localterra network, as shown in the following image

terrad

Important: 'terracli' has been deprecated, and all of its functionalities are merged into 'terrad'.

1. Ensure the same version of terrad and LocalTerra are installed.

2. Use terrad to talk to your LocalTerra terrad node:

$ terrad status

This command automatically works because terrad connects to localhost:26657 by default.

The following command is the explicit form:

$ terrad status --node=tcp://localhost:26657

3. Run any of the terrad commands against your LocalTerra network, as shown in the following example:

$ terrad query account terra1dcegyrekltswvyy0xy69ydgxn9x8x32zdtapd8

Terra SDK for Python

Connect to the chain through LocalTerra's LCD server:

from terra_sdk.client.lcd import LCDClient
terra = LCDClient("localterra", "http://localhost:1317")

Terra SDK for JavaScript

Connect to the chain through LocalTerra's LCD server:

import { LCDClient } from "@terra-money/terra.js";

const terra = new LCDClient({
  URL: "http://localhost:1317",
  chainID: "localterra",
});

Configure LocalTerra

The majority of LocalTerra is implemented through a docker-compose.yml file, making it easily customizable. You can use LocalTerra as a starting template point for setting up your own local Terra testnet with Docker containers.

Out of the box, LocalTerra comes preconfigured with opinionated settings such as:

• ports defined for RPC (26657), LCD (1317) and FCD (3060)
• standard accounts

Modifying node configuration

You can modify the node configuration of your validator in the config/config.toml and config/app.toml files.

Pro tip: Speed Up Block Time

LocalTerra is often used alongside a script written with the Terra.js SDK or Terra Python SDK as a convenient way to do integration tests. You can greatly improve the experience by speeding up the block time.

To increase block time, edit the [consensus] parameters in the config/config.toml file, and specify your own values.

The following example configures all timeouts to 200ms:

##### consensus configuration options #####
[consensus]

wal_file = "data/cs.wal/wal"
- timeout_propose = "3s"
- timeout_propose_delta = "500ms"
- timeout_prevote = "1s"
- timeout_prevote_delta = "500ms"
- timeout_precommit_delta = "500ms"
- timeout_commit = "5s"
+ timeout_propose = "200ms"
+ timeout_propose_delta = "200ms"
+ timeout_prevote = "200ms"
+ timeout_prevote_delta = "200ms"
+ timeout_precommit_delta = "200ms"
+ timeout_commit = "200ms"

Additionally, you can use the following single line to configure timeouts:

sed -E -i '/timeout_(propose|prevote|precommit|commit)/s/[0-9]+m?s/200ms/' config/config.toml

Modifying genesis

You can change the genesis.json file by altering config/genesis.json. To load your changes, restart your LocalTerra.

Accounts

LocalTerra is pre-configured with one validator and 10 accounts with LUNA balances.

Account	Address	Mnemonic
validator	terra1dcegyrekltswvyy0xy69ydgxn9x8x32zdtapd8 terravaloper1dcegyrekltswvyy0xy69ydgxn9x8x32zdy3ua5	satisfy adjust timber high purchase tuition stool faith fine install that you unaware feed domain license impose boss human eager hat rent enjoy dawn
test1	terra1x46rqay4d3cssq8gxxvqz8xt6nwlz4td20k38v	notice oak worry limit wrap speak medal online prefer cluster roof addict wrist behave treat actual wasp year salad speed social layer crew genius
test2	terra17lmam6zguazs5q5u6z5mmx76uj63gldnse2pdp	quality vacuum heart guard buzz spike sight swarm shove special gym robust assume sudden deposit grid alcohol choice devote leader tilt noodle tide penalty
test3	terra1757tkx08n0cqrw7p86ny9lnxsqeth0wgp0em95	symbol force gallery make bulk round subway violin worry mixture penalty kingdom boring survey tool fringe patrol sausage hard admit remember broken alien absorb
test4	terra199vw7724lzkwz6lf2hsx04lrxfkz09tg8dlp6r	bounce success option birth apple portion aunt rural episode solution hockey pencil lend session cause hedgehog slender journey system canvas decorate razor catch empty
test5	terra18wlvftxzj6zt0xugy2lr9nxzu402690ltaf4ss	second render cat sing soup reward cluster island bench diet lumber grocery repeat balcony perfect diesel stumble piano distance caught occur example ozone loyal
test6	terra1e8ryd9ezefuucd4mje33zdms9m2s90m57878v9	spatial forest elevator battle also spoon fun skirt flight initial nasty transfer glory palm drama gossip remove fan joke shove label dune debate quick
test7	terra17tv2hvwpg0ukqgd2y5ct2w54fyan7z0zxrm2f9	noble width taxi input there patrol clown public spell aunt wish punch moment will misery eight excess arena pen turtle minimum grain vague inmate
test8	terra1lkccuqgj6sjwjn8gsa9xlklqv4pmrqg9dx2fxc	cream sport mango believe inhale text fish rely elegant below earth april wall rug ritual blossom cherry detail length blind digital proof identify ride
test9	terra1333veey879eeqcff8j3gfcgwt8cfrg9mq20v6f	index light average senior silent limit usual local involve delay update rack cause inmate wall render magnet common feature laundry exact casual resource hundred
test10	terra1fmcjjt6yc9wqup2r06urnrd928jhrde6gcld6n	prefer forget visit mistake mixture feel eyebrow autumn shop pair address airport diesel street pass vague innocent poem method awful require hurry unhappy shoulder

License

This software is licensed under the MIT license.

© 2020 Terraform Labs, PTE.

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