Network Resources

This page collects the public nodes, faucets, explorers, and tools used by the v0.9.1 quick-start guides. The endpoints below were checked on 2026-08-17.

Testnet resources may change without notice. This page is updated to reflect the current state. If you find outdated information, please open an issue.

Public Nodes

Mainnet

Name	Pubkey	WSS Address	Minimum channel funding
fiber-mainnet-public-ca	`03a8d7da8d0934363dbc17f52c872e8d833016415266eabb3527439c5dd17adc6b`	`/dns4/ca.fiber.channel/tcp/443/wss/p2p/QmZCfzENZqWrWwifJj9BFDvxQWFyYw5GjdB4vN7Ynd4FxY`	≥ 499 CKB
fiber-mainnet-public-tokyo	`033a69e5be369dab43aefa96fa729d83c571ccb066f312136c6ab2d354fcc028f9`	`/dns4/tokyo.fiber.channel/tcp/443/wss/p2p/QmZ73KHvZ5GFxf6XhHZ3icPeKFo93rk86kZ8qauox3avJP`	≥ 499 CKB

Testnet

Name	Pubkey	Native TCP address	Browser WSS address	Minimum funding
fiber-testnet-public-bottle	`02b6d4e3ab86a2ca2fad6fae0ecb2e1e559e0b911939872a90abdda6d20302be71`	`/dns4/bottle.fiber.channel/tcp/8119/p2p/QmXen3eUHhywmutEzydCsW4hXBoeVmdET2FJvMX69XJ1Eo`	`/dns4/bottle.fiber.channel/tcp/443/wss/p2p/QmXen3eUHhywmutEzydCsW4hXBoeVmdET2FJvMX69XJ1Eo`	499 CKB or 20 RUSD
fiber-testnet-public-bracer	`0291a6576bd5a94bd74b27080a48340875338fff9f6d6361fe6b8db8d0d1912fcc`	`/dns4/bracer.fiber.channel/tcp/8119/p2p/QmbKyzq9qUmymW2Gi8Zq7kKVpPiNA1XUJ6uMvsUC4F3p89`	`/dns4/bracer.fiber.channel/tcp/443/wss/p2p/QmbKyzq9qUmymW2Gi8Zq7kKVpPiNA1XUJ6uMvsUC4F3p89`	499 CKB or 20 RUSD

Since v0.8.0, Fiber RPCs identify peers by pubkey (hex-encoded secp256k1). A synced node can resolve a pubkey from gossip, but quick-start commands pass both the pubkey and explicit address so the first connection does not depend on graph synchronization. Native nodes use TCP; browser/WASM nodes use WSS.

Faucets

Resource	URL	Notes
CKB Testnet Faucet	https://faucet.nervos.org	Get testnet CKB
cWBTC Faucet	https://faucet-cwbtc.ckb.dev	Get testnet cWBTC for CCH testing
RUSD (Stablecoin)	https://testnet0815.stablepp.xyz/faucet	Claim through a wallet, then transfer Testnet RUSD to the node address

Block Explorers

Resource	URL
CKB Testnet Explorer	https://explorer.nervos.org/aggron
Fiber Network Dashboard	https://dashboard.fiber.channel/nodes

Network Topology

The typical testnet topology for multi-hop payments:

┌───────┐        ┌───────┐        ┌───────┐        ┌───────┐
│ nodeA │ ─────▶ │ node1 │ ─────▶ │ node2 │ ─────▶ │ nodeB │
│:8227  │        │public │        │public │        │:8237  │
└───────┘        └───────┘        └───────┘        └───────┘
  sender        relay node 1     relay node 2      receiver

Local nodes (nodeA, nodeB) do not need to expose a public address — they connect through the public relay nodes.

Channel Capacity

When opening a channel, each side must reserve 99 CKB (98 CKB for commitment lock + 1 CKB for shutdown transaction fee). This reserved amount is not available for off-chain payments.

Example: If you fund 499 CKB and the public node contributes 250 CKB:

Your available balance: 499 - 99 = 400 CKB
Public node available: 250 - 99 = 151 CKB

Node Downloads

Download the pinned Fiber Node v0.9.1 release. Choose the asset matching your operating system and CPU architecture; each archive includes fnn, fnn-cli, and network config files.

Getting Help

GitHub Issues — bug reports and feature requests
Fiber Documentation — full documentation

Network Resources

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