# Join Us to Test Grin Hard Fork

**URL:** <https://forum.grin.mw/t/join-us-to-test-grin-hard-fork/5281>\
**Category:** Announcements\
**Created:** [June 20, 2019, 3:09pm UTC](https://forum.grin.mw/t/join-us-to-test-grin-hard-fork/5281 "2019-06-20T15:09:16Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![quentinlesceller](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.grin.mw/quentinlesceller/32/21_2.png) [@quentinlesceller](https://forum.grin.mw/u/quentinlesceller)\
**Post date:** [June 20, 2019, 3:09pm UTC](https://forum.grin.mw/t/join-us-to-test-grin-hard-fork/5281/1 "2019-06-20T15:09:16Z")

</div>

As mentioned [here](https://forum.grin.mw/t/grin-first-hard-fork-mid-july/5148), Grin mainnet will hard fork mid July (block 262\_080 **)** and grin floonet on June 23 (block 185\_040 **).** In order to be sure that this hard fork will go smoothly, we will do a dry run on block 182\_040 (roughly around 2019-06-21 13:39:00 UTC) on a small network.  
We welcome all developers to join us and test this hard fork.

How to join the “private” network.

## 1. Download and install

```bash

#Clone grin repository
git clone https://github.com/mimblewimble/grin.git

#Go to grin dir
cd grin

#Checkout latest tag
git checkout v2.0.0-beta.1

#Download git patch
wget https://gist.githubusercontent.com/quentinlesceller/2d2231e5e394cf14f310343cce314e2d/raw/45647ea6d1aee7726343b68eafc92cb8ec14b6e3/hf.patch

#Apply git patch
git apply hf.patch

#Build Grin
cargo build --release

```

## 2. Change your server configuration

Modify your server configuration (in ~/.grin/floo/grin-server.toml)

Change `seeding_type` to `List` and uncomment the `seeds` line below and put the following IP address.

```auto
seeds = ["100.26.68.39:13414"]

```

You can now start you grin node with `grin --floonet`.

Your node will hard fork on block 182,040.

Join us on [Gitter #dev](https://gitter.im/grin_community/dev) to debug, discuss and exchanges test grins!

---

<div class="post-metadata">

**Author:** ![noobvie](https://avatars.discourse-cdn.com/v4/letter/n/9d8465/32.png) [@noobvie](https://forum.grin.mw/u/noobvie)\
**Post date:** [June 21, 2019, 2:26pm UTC](https://forum.grin.mw/t/join-us-to-test-grin-hard-fork/5281/2 "2019-06-21T14:26:29Z")

</div>

Just setup 2 of my nodes to test this, strange that the number of peers so small  
Firewall rules are allowed  
 ![image](https://canada1.discourse-cdn.com/flex036/uploads/grin/original/2X/a/a5dc6574072602b3ee737fc4e4730d8f658efceb.png)

---

<div class="post-metadata">

**Author:** ![quentinlesceller](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.grin.mw/quentinlesceller/32/21_2.png) [@quentinlesceller](https://forum.grin.mw/u/quentinlesceller)\
**Post date:** [June 21, 2019, 2:38pm UTC](https://forum.grin.mw/t/join-us-to-test-grin-hard-fork/5281/3 "2019-06-21T14:38:46Z")

</div>

I also only have 4 peers. This is to be expected as it is a small experiment before the real hard fork.

---

<div class="post-metadata">

**Author:** ![nikito7](https://avatars.discourse-cdn.com/v4/letter/n/e5b9ba/32.png) [@nikito7](https://forum.grin.mw/u/nikito7)\
**Post date:** [June 21, 2019, 4:30pm UTC](https://forum.grin.mw/t/join-us-to-test-grin-hard-fork/5281/4 "2019-06-21T16:30:27Z")

</div>

The max was 38 peers

20190621 13:34:05.700 DEBUG grin\_servers:😁:seed - monitor\_peers: on 0.0.0.0, 38 connected (36 most\_work). all 268 = 252 healthy + 0 banned + 16 defunct

Now

20190621 17:29:08.281 DEBUG grin\_servers:😁:seed - monitor\_peers: on 0.0.0.0, 8 connected (5 most\_work). all 312 = 12 healthy + 0 banned + 300 defunct

---

<div class="post-metadata">

**Author:** ![quentinlesceller](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.grin.mw/quentinlesceller/32/21_2.png) [@quentinlesceller](https://forum.grin.mw/u/quentinlesceller)\
**Post date:** [June 21, 2019, 4:54pm UTC](https://forum.grin.mw/t/join-us-to-test-grin-hard-fork/5281/5 "2019-06-21T16:54:07Z")

</div>

Is to be expected your node banned the nodes that were not on the test hard fork.