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feat: FixedFloat payments for XMR LTC ETH USDTTRC - #424
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October 20, 2026 15:30
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Adds a
fixedfloatpayment method. The customer picks a coin with?method=fixedfloat&coin=XMR(XMR, LTC, ETH or USDTTRC). Each payment creates a FixedFloat order from that coin to BTC whose BTC destination is a fresh address from the company's on-chain provider. The existing on-chain watcher matches the arriving BTC by that address and re-prices from what actually arrived, so a short or late deposit buys proportionally less time.Configured with a
fixedfloatprovider config (api_key,api_secret, optionalurl,refcode,afftax). The method'ssupported_currenciesis the coin allowlist (empty accepts all four). The company also needs an enabledonchainconfig.Needs payments-rs 0.8.0, which adds the coin variants to
Currency.Not yet run against the live FixedFloat API; the
createrequest is written from their docs and covered by wiremock tests only.