Sia / Skynet

Rede de Armazenamento Descentralizada

Sia is a decentralized cloud storage network where renters form cryptographic storage contracts with hosts on a Proof-of-Work blockchain, paying in Siacoin (SC). Skynet (now defunct as a hosted service, Sia continues) was a layer-2 content delivery and decentralized web protocol built on top of Sia, enabling file sharing via persistent Skylinks.

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Detalhes

Licença Permissive (MIT)
Status de Dev 🟢 Ativo
Detalhe do Status de Dev Released (Sia actively maintained by Sia Foundation); Skynet Labs: Defunct
Proprietário Sia Foundation (nonprofit, Luke Champine) — core Sia protocol; Skynet Labs (David Vorick) — defunct since Nov 2022
Órgão de Governança Sia Foundation (non-profit — core Sia protocol); Skynet Labs defunct since November 2022
País USA
Ano de Início 2013
Stack Golang
Financiamento VC + personal investment (no ICO; ~$750K seed 2014; <$10M total raised by Nebulous; Sia Foundation funded via blockchain subsidy)
Última Investigação 9 de mar. de 2026

Domínios de Caso de Uso

Evolução de Plataformas e Soberania

Capacidades

Autoalojável Armazenamento local-first Portabilidade de dados

Rede de Armazenamento Descentralizada Atributos

Origens Decentralized cloud storage / backup
Banco de Dados Proof-of-Work blockchain (Siacoin); erasure-coded file shards on hosts
Linguagem de Consulta REST API (renterd/hostd APIs); Skynet SDK (JS, Go)
Formatos de Dados Any binary; Skylinks (46-char encoded metadata for Skynet content)
Suporte Móvel N/A (infrastructure; wallet apps exist)
Suporte Web Yes (web portals for Skynet; renterd has web dashboard)
Aplicativos Nativos Native apps (Sia Desktop app; renterd/hostd with web dashboard)
Termos Self-hosting (run host or renter node); pay-per-contract (Siacoin)
Fundos <$10M raised by Nebulous Inc. through 2020; Sia Foundation funded by block reward subsidy (~30,000 SC/block) introduced via hard fork Feb 2021
Baseado Em Novel (original PoW blockchain with smart storage contracts)
Arquitetura P2P Public blockchain (PoW; host-renter contracts via blockchain; Skynet adds portal layer)
Rede de Sobreposição Global
Endereçamento por Conteúdo Yes (file shards addressed by Merkle hash; Skylinks encode content-addressed metadata)
Local-First N/A (cloud storage model)
Criptografia de Ponta a Ponta (E2EE) Yes (client-side encryption of uploaded files before storage on hosts)
Tolerância a Falhas Bizantinas Partial (PoW blockchain is BFT; individual host honesty enforced by cryptographic storage contracts and collateral slashing)
Assinatura Ed25519
Permissões Cryptographic Capabilities (storage contracts with host collateral; Skynet registry uses public key access control)
Compatibilidade com a Web Semântica N/A
Contrato Inteligente Yes (storage contracts are on-chain smart contracts in Siacoin blockchain)
Posição na Pilha de Protocolo Application-layer (built on TCP/IP)
Incorporação de Ativo / Valor Native (Siacoin SC embedded at blockchain level; storage contracts settle in SC)
Maturidade / Padronização do Protocolo De Facto Standard (established since 2015; community standard for decentralized storage; no formal standards body)
Política de Atualização Mutable (versioned) for Sia files (hosts can update via new contracts); Skynet Registry supports mutable entries; immutable content-addressed files via Skylinks
Mecanismo de Prova de Armazenamento Merkle audit proof (hosts must submit cryptographic storage proofs on-chain at contract end; failure results in collateral burn and missed payment)
Modelo Econômico / de Incentivo Token rewards (native token SC): renters lock SC in contracts; hosts earn SC for proven storage; both parties lose collateral for breach
Garantia de Recuperação Best-effort (incentivized via cryptographic contracts and collateral; retrieval availability depends on host uptime and contract renewal)