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Build. Trust.

Petrachor is a comprehensive monetary system, enabling the creation, storage, and transfer of its currency, the Petra.

Our light-weight architecture blockchain can run from a phone, tablet, or desktop - never trust a third-party again.

Petrachor uses 100% original code for the Ariel Protocol - a resource efficient and censorship resistant Proof of Stake consensus.

All Petrachor wallets can mine - earn rewards, reduce inflation, and strengthen security.

Technical Overview

Petrachor uses the Ariel PoS protocol, which is our custom implementation of the original iChing Proof-of-Stake consensus, a secure and eco-friendly Satoshi-style protocol. iChing is a natural mimic of Bitcoin consensus; as a result, scalability solutions for Bitcoin can be immediately used in Petrachor. By applying this blockchain protocol to a fork of the Ethereum source code, we deliver a powerful new dApp platform combining the energy-efficiency of PoS with the power and versatility of Ethereum.

Proof of Stake

Keeping in the spirit of naming consensi after ghosts, Ariel incarnates an academic protocol that was proven to satisfy important formal chain properties including common prefix, chain quality, chain growth, and chain soundness.

BLS Signature Scheme

The Boneh-Lynn-Shacham unique signature scheme is used for the core random beacon of Ariel. By also securing accounts with BLS, we pave the road towards interesting future extensions, such as multisignatures, threshold signatures and aggregate signatures.

BLS12-381 Elliptic Curve

The elliptic curve used by our signature scheme is BLS12-381, a Barreto-Lynn-Scott curve. This curve was introduced in Sapling, the latest upgrade to the ZCash protocol, with the aim to improve efficiency and security while reducing memory intensivity.


Native Unit:
Initial Supply:
Target Block Time:
Minimum Coin Age:
Block Reward:
Compute Engine:
Signature Scheme:
Elliptic Curve Pairing:
Mainnet Launch:
Petra (PTA)
Proof of Stake
Ariel Protocol
1,000,000,000 PTA
30 minutes
256 blocks
3% annually
Ethereum Virtual Machine
Barreto-Lynn-Scott - BLS12-381
March 13, 2019
Bitcoin Hash Block# 566795

Petra Supply

Total Supply:
Circulating Supply:


A Scalable Proof-of-Stake Blockchain in the Open Setting
Short signatures from the Weil pairing
BLS Multi-Signatures With Public-Key Aggregation