Ephemeral Testnet Yolo

Created: 2020-04-19
James Hancock (@madeoftin)
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1 min read

EIP-2657 proposes the creation of an ephemeral testnet called Yolo for testing basic infrastructure. The testnet will be nuked after testing and is not for deploying dapps or defining what will go into mainnet. The Yolo testnet will use the YOLO-v1 ID and clients who wish to sync need to implement the specified features into their client. The proposed timeline for deployment is June 3rd, 2020. Geth has already implemented the necessary features and is ready to participate in Yolo. The syncing instructions for Geth are provided in the context. The Yolo testnet also has a support system, a genesis config json, an EF bootnode, a stats page secret, and an unauthenticated faucet. The copyright and related rights for this proposal have been waived via CC0.

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Disclaimer: This is for testing basic infrastructure. It will be nuked. It is not for deploying dapps, nor does it define what will go into mainnet. For information on network upgrades, please follow the relevant meta EIPs and ongoing discussion on Ethereum/pm.


The specification for Ephemeral Testnet Yolo. Clients who wish to sync need to implement the following features into their client. It is for testing basic infrastructure and will be nuked.


Name: Yolo ID: YOLO-v1

[ ] Proposed - [x] Consensus to include.


  • Deployed: June 3rd 2020

Client Consensus -> Implementation



Signal - Client intends to participate. (You are on the bus)

Spec - Client is satisfied with the proposed specification. (You agree with the direction)

Merge - Changes are implemented in the client and configurable for YOLO. (You are ready to hit the gas and go)

Syncing Client syncs with the network

Syncing Instructions


  • Yolo V1 testnet is up and running https://yolonet.xyz/
  • Support is baked into Geth master branch via --yolov1
  • Genesis config json is at https://yolonet.xyz/yolo.json
  • EF bootnode at enode://9e1096aa59862a6f164994cb5cb16f5124d6c992cdbf4535ff7dea43ea1512afe5448dca9df1b7ab0726129603f1a3336b631e4d7a1a44c94daddd03241587f9@
  • Stats page secret is YOLOv1, with geth you can --ethstats='yournode:YOLOv1@stats.yolonet.xyz'
  • Faucet is unauthenticated, you can reach it from the dashboard

Copyright and related rights waived via CC0.

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