Upstream ElectrumX 2.0.0 (3 July 2026) with the Doichain mainnet, testnet and
regtest coin classes ported onto it: AuxPoW + SegWit deserializer, name index
including name_doi, NAME_EXPIRATION 36,000 (regtest 30), RPC ports 8339 / 18339
/ 18332.

This is the source the image doichain/electrumx:v2.0.0-doi1 is built from.

Verified end to end: from empty volumes the index was complete after ~22 minutes
with the tip hash identical to a fleet node's; the name index answers
blockchain.name.get_value_proof (protocol >= 1.4.3) for the name_doi in block
431,320; Electrum wallets remain served, since 2.0 still offers protocol 1.4.