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by captn3m0
2139 days ago
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The “resolution” is done by forwarding the query to your PSP which forwards it to the NPCI which forwards it to the issuing bank. The client-PSP is over HTTPS, and the remaining legs are over UPI (which is essentially SOAP+XML) which uses XML signatures. There are rate-limits built at most ends, and I think most PSPs also cache the resolution. |
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