Default WebSocket Electrum endpoints. Mainnet, mutinynet, and signet
point at Ark Labs–operated Fulcrum 2.1 deployments (which support
blockchain.transaction.broadcast_package for atomic 1P1C TRUC
relay; see ElectrumOnchainProvider.broadcastTransaction). Testnet
defaults to Blockstream's public Fulcrum because Ark doesn't host
it. Regtest assumes the Fulcrum WebSocket endpoint exposed by the
local arkade-regtest stack.
Default WebSocket Electrum endpoints. Mainnet, mutinynet, and signet point at Ark Labs–operated Fulcrum 2.1 deployments (which support
blockchain.transaction.broadcast_packagefor atomic 1P1C TRUC relay; seeElectrumOnchainProvider.broadcastTransaction). Testnet defaults to Blockstream's public Fulcrum because Ark doesn't host it. Regtest assumes the Fulcrum WebSocket endpoint exposed by the localarkade-regteststack.