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.\"     Title: lightning-sendpay
.\"    Author: [see the "AUTHOR" section]
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.\"      Date: 09/06/2016
.\"    Manual: \ \&
.\"    Source: \ \&
.\"  Language: English
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.TH "LIGHTNING\-SENDPAY" "7" "09/06/2016" "\ \&" "\ \&"
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.SH "NAME"
lightning-sendpay \- Protocol for sending a payment via a route\&.
.SH "SYNOPSIS"
.sp
\fBsendpay\fR \fIroute\fR \fIhash\fR
.SH "DESCRIPTION"
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The \fBsendpay\fR RPC command attempts to send funds associated with the given \fIhash\fR, along a route to the final destination in the route\&.
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Generally, a client would call getroute(7) to resolve a route, then use \fBsendpay\fR to send it\&. If it fails, it would call getroute(7) again to retry\&.
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The response will occur when the payment fails or succeeds\&. Once a payment has succeeded, calls to \fBsendpay\fR with the same \fIhash\fR will fail; this prevents accidental multiple payments\&.
.SH "RETURN VALUE"
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On success, a \fIpreimage\fR hex string is returned as proof that the destination received the payment\&. The \fIpreimage\fR will SHA256 to the \fIhash\fR given by the caller\&.
.sp
On error, if the error occurred from a node other than the final destination, the route table will be updated so that getroute(7) should return an alternate route (if any)\&. An error from the final destination implies the payment should not be retried\&.
.SH "AUTHOR"
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Rusty Russell <rusty@rustcorp\&.com\&.au> is mainly responsible\&.
.SH "SEE ALSO"
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lightning\-listinvoice(7), lightning\-delinvoice(7), lightning\-getroute(7), lightning\-invoice(7)\&.
.SH "RESOURCES"
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Main web site: https://github\&.com/ElementsProject/lightning