Threshold BLS infrastructure for verifiable randomness, with 224,000+ computation tasks completed
ARPA is a decentralized secure computation network built around threshold BLS signatures. Its first major product, Randcast, supplies on-chain verifiable randomness for games, lotteries and decentralized applications. ARPA says its mainnet has completed more than 224,000 computation tasks.
The project began in 2018 as ARPA Chain, a privacy-preserving Multi-party Computation network. Felix Xu is listed as co-founder and CEO. A strategic funding round announced in May 2024 raised $6 million from Laser Digital and DeFiance Capital, with participation from Animoca Brands, Metrics Ventures, ArkStream Capital and Trinito.
Nodes take part in distributed key generation and produce partial BLS signatures. A group aggregates those signatures, while ARPA smart contracts verify the result on-chain before a request is fulfilled. The NodeRegistry handles node registration, activation, exit and slashing. The Controller and Coordinator manage groups and key-generation phases, while the Adapter manages subscriptions, payments, task assignment and callbacks.
Developers can use the Randcast SDK, Solidity contracts, Foundry tools or a web portal. The portal creates and funds subscriptions, adds consumer contracts, and displays pending and historical requests. Documentation covers Ethereum, BNB Chain and ARPA Chain. The wider network is designed for secure wallets, cross-chain bridges and decentralized custody, although those uses require separate integrations.
Randcast lists a flat fee of 0.000002 ETH per request on Ethereum Mainnet and 0.000006 BNB per request on BSC Mainnet. Requests also require funds for the underlying blockchain transaction. ARPA token holders can stake through native staking or a community pool. Node operators face slashing for malicious activity, and staking rewards depend on network participation and token economics.
ARPA dates its project origin to 2018. The threshold-signature network is operated by nodes across different regions. An audit report is linked for ARPA Staking. The network’s security depends on node participation, group formation and smart-contract operation. A node outage or coordination failure can delay randomness requests, while a compromised threshold of participants could affect outputs.
Applications require correctly configured contracts and funded subscriptions goals. Staking introduces exposure to ARPA token economics, while bridges and custody applications add smart-contract and counterparty risks.
ARPA offers cryptographically verified randomness and threshold signature infrastructure across EVM chains, but its utility remains concentrated in niche tooling like Randcast rather than general-purpose infrastructure.
Founded in 2018 as ARPA Chain, ARPA is a decentralized Boneh–Lynn–Shacham threshold signature scheme (BLS-TSS) network. Led by co-founder and CEO Felix Xu, the protocol provides cryptographic infrastructure. It powers verifiable random number generation (RNG) through its Randcast product, alongside support for cross-chain communication and decentralized custody.
ARPA provides threshold BLS signature infrastructure for verifiable randomness. Instead of relying on centralized generation, independent nodes complete Distributed Key Generation (DKG) to generate partial keys and aggregate signatures. These signatures are checked on-chain by adapter contracts before any request is fulfilled. Developer tooling includes Foundry Cast, Remix, and a web subscription portal, with on-chain requests funded directly using ETH or native tokens.
The system also presents distinct limitations. ARPA token holders can secure the network through native staking. Archive of Fate is an AI-powered life simulation game that uses verifiable randomness powered by Randcast. Node participants face slashing risks via the NodeRegistry contract, and the network uses ARPA token economics for operator incentives.
| Services | Oracle, Developer tooling, Staking infrastructure · unverified |
|---|---|
| Free tier | No · unverified |
| Pricing from | 0.000002 ETH per request · unverified |
| Open source | Yes · unverified |
| Token | ARPA · unverified |
Not disclosed by the provider: Chains supported, Enterprise SLA, Uptime SLA, Free tier limits, Server regions.
Data from the provider's website and public sources. Fees and availability change; confirm on the official site before you sign up.
Randcast generates on-chain verifiable random numbers for games, lotteries and decentralized applications.
Nodes produce partial BLS signatures through distributed key generation, with results verified on-chain.
Documentation covers Ethereum, BNB Chain and ARPA Chain for Randcast integrations.
The web portal creates, funds and cancels subscriptions, then adds or removes consumer contracts.
Developers can use the Randcast SDK, Solidity contracts, Foundry Cast or the web interface.
NodeRegistry manages registration, activation, exit and slashing, while Controller and Coordinator manage groups.
ARPA holders can stake directly or use the community pool, while node operators participate in signing.
The core cryptographic infrastructure running Boneh–Lynn–Shacham threshold signature tasks across decentralized node groups for secure key generation and execution.
An on-chain verifiable random number generator that supplies tamper-resistant randomness to smart contracts via dedicated adapter contracts and SDKs.
A native staking mechanism that lets ARPA token holders stake directly to node operators or participate in community pools to secure the network.
A web interface where developers can create, fund, monitor, and cancel randomness subscriptions without setting up local development tools.
An AI-powered life simulation game developed by ARPA that demonstrates on-chain verifiable randomness generated through the Randcast protocol.
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ARPA was co-founded by CEO Felix Xu, launching in 2018 originally as ARPA Chain.
Yes, the network uses the ARPA token for node staking, operator rewards and slashing mechanisms.
Randcast charges a flat protocol fee per randomness request, costing 0.000002 ETH on Ethereum Mainnet and 0.000006 BNB on BNB Chain.
ARPA supports EVM networks including Ethereum Mainnet, BNB Chain, and the ARPA Chain environment.
Randcast is an on-chain verifiable random number generator built on ARPA's BLS threshold signature network for decentralized gaming and lottery applications.
Recent public posts from @arpaofficial, shown as published. Not reviewed or endorsed by CryptoReview.
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