OpenSPV — multi-chain wallet source record

The archived site guidance describes BCH, XEC, BTC, LTC, DOGE and BSV,
separate chain watchers, browser-calculated balances, checkpoint-based
header validation and per-chain proof storage. The wallet and send screens
select a chain with a query parameter; the fallback is BCH.

The six-chain browser test in scripts/e2e-chains.ts includes checks for
invalid recipients and amounts. Its last change in the archive is dated
October 12, 2026. Test fixtures do not broadcast payments.

Source: code/openspv/ts/openspv-com/{AGENTS.md,scripts/e2e-chains.ts}
at archive snapshot 623219f6230ec74e737e98629c43032104b482bc.