Support BTC testnet4 in lightweight provider#363
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anderdc
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May 21, 2026
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The testnet system now runs on Bitcoin testnet4 for BTC swaps. The lightweight provider only knew
testnet(testnet3) and pointed Esplora at Blockstream — which serves no testnet4 API.Changes
btc_api_bases:BTC_NETWORK=testnet4selectshttps://mempool.space/testnet4/api(the only public testnet4 Esplora; Blockstream returns an SPA shell, not API data).testnet4as a test network (NETWORKS['test']— testnet3/testnet4 share address + WIF params).:48332totestnet4..env.exampledocumentstestnet4as a validBTC_NETWORKvalue.Legacy
BTC_NETWORK=testnetis untouched — still resolves to the testnet3 Blockstream/mempool bases, so existing.envfiles keep working.Verification
https://mempool.space/testnet4/api/blocks/tip/height→ live (tip 135865).https://blockstream.info/testnet4/api/...→ SPA HTML, no API (confirmed dropped from defaults).ruff check/ruff formatclean.Docs PRs follow in allways-ui (agents page) and allways-docs-ui.