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Chiado (Testnet)

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Chiado Train Station Image: Trams in Lisbon (credit: Lisa Fotios)



  • Chiado is a Gnosis testnet that was launched in October 2022
  • Chiado's primary purpose is to be a long-lived testnet with tooling for developers
  • Chiado's secondary purpose was to test "The Merge", Gnosis' transition from Proof-of-Authority to the Beacon Chain.
  • Chiado is named after the Chiado metro station in Lisbon, Portugal.


  • Chiado is optimized for testnet stability for developers, and has a semi-permissioned validator set similar to Ethereum's Sepolia testnet
  • Chiado is not intended for broad public validator participation, as frequent cycling of validators affect Testnet stability and make it unreliable for developers (e.g. Ethereum's Prater testnet)
  • Chiado validators are run by core contributor teams at Nethermind, Gateway and Gnosis (and possibly more in the future)
  • 6,000 validator keys were defined in the genesis of Chiado Beacon Chain for Gateway, Nethermind and Gnosis to run as validators

Public Participation

  • Community members can still run a full node and go through the Chiado merge as it happens
  • 1,000 Testnet GNO on Chiado may be available in the future for community public validator participation
  • Community participation will be limited to 14% of the Chiado Network to ensure network stability
  • 1 Testnet GNO is required to run a validator, similar to Gnosis mainnet
  • Requests for Chiado participation keys can be made in the #chiado-testnet channel in Discord

How to Participate


Key Infra

Network NameChiado
Native (fee) tokenTestnet xDai on Chiado
Staking tokenTestnet GNO on Chiado
Chain ID10200
Execution Layer RPC (archive)
Execution Layer RPC
Execution Layer RPC (WS)wss://
Execution Layer Explorer
Consensus Layer Explorer
Beacon Checkpoint Sync
Fork monitor

Key Parameters

Slot Time5s
Epoch16 slots
Finalization Time2.7 min
Staking Deposit1 Testnet GNO on Chiado

Native Tokens

Fee Token

  • Name: Testnet xDai on Chiado
  • Type: Native Asset

Staking Token 1

To mimic Ethereum-Gnosis conditions, Chiado uses a "Testnet GNO" token that is issued on Goerli and bridged over via the AMB.

Testnet GNO on Goerli0x7f477c3f03213970d939104cc436dc995cf615b5
Testnet GNO on Chiado0x19C653Da7c37c66208fbfbE8908A5051B57b4C70
Testnet mGNO on Chiado0xc5be8bf53755a41c2385e7aa86f6a9e28746f466
Deposit Contract0xb97036A26259B7147018913bD58a774cf91acf25

Network Config

Config Repo

Gnosis maintains a Configs Repo that is the canonical source for Gnosis Chain networks.

Consensus Layer

Execution Layer

Key Contracts

Bridges 2

Using the Tokenbridge nomenclature, Home refers to Chiado while Foreign refers to Goerli

Governance Safes
Governance Safe Chiado0x0Ad7de9064BAA98892a244e1415Ca8a2766096D2
Governance Safe Goerli0xf02796C7B84F10Fa866DAa7d5701A95f3131A727
Native Bridge(xDAI Bridge)
Chiado TokenBridge0xbb3c86f9918C3C1d83668fA84e79E876d147fFf2
Chiado ValidatorsProxy0x0ee7EBC72b26e8CeAbbdF275A19dA8e4361685Ce
Goerli TokenBridge0x8659Cf2273438f9b5C1Eb367Def45007a7A16a24
Goerli ValidatorsProxy0x1F35121d14ABC91689a7903bf911dce83B0c6EF6
AMB & Omnibridge
Chiado Omnibridge Mediator0x09D549a48AC52F3f9945E7de6402c609c92aa2E1
Chiado AMB0x99Ca51a3534785ED619f46A79C7Ad65Fa8d85e7a
Goerli Omnibridge Mediator0x00147c84f13764dCDAbAF1cbAe622fa6f6839085
Goerli AMB0x87A19d769D875964E9Cd41dDBfc397B2543764E6
AMB Bridge Validators
Gnosis DAO0xc9ADb79B8A6e7C6e90c765A3B4d16d81213c9D49
Gnosis DAO0x1abbf5ec09763afc398551e555967931d64e1508
Native Bridge(xDAI bridges) Validators
0xef35547c29a7547df67ff573c158bf1b74381add(Gateway) 0xda286781cbbc9819c94852885a118c93ed25e064 0x758c277ca1b04da3ba3add5d61cd26337cfafd7e 0xdc3a6044440b75c5cefb023ae2d0e5b9069230cf (Gnosis DAO)
0xef35547c29a7547df67ff573c158bf1b74381add(Gateway) 0xda286781cbbc9819c94852885a118c93ed25e064 0x758c277ca1b04da3ba3add5d61cd26337cfafd7e 0x9d84152df06880cdabeb30e10c2985f40d98b901 0xdc3a6044440b75c5cefb023ae2d0e5b9069230cf (Gnosis DAO)



Previous Iterations

Chiado 0.2

Chiado was previously launched with network ID 100100. Soon after launch, the network entered a forked state. The root causes were identified and fixed as part of the Chiado relaunch.

Chiado 0.1