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'\" t
.\" Title: lightning-sendpay
.\" Author: [see the "AUTHOR" section]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\" Date: 09/06/2016
.\" Manual: \ \&
.\" Source: \ \&
.\" Language: English
.\"
.TH "LIGHTNING\-SENDPAY" "7" "09/06/2016" "\ \&" "\ \&"
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.\" * Define some portability stuff
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.\" * MAIN CONTENT STARTS HERE *
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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"
.sp
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\&.
.sp
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\&.
.sp
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"
.sp
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"
.sp
Rusty Russell <rusty@rustcorp\&.com\&.au> is mainly responsible\&.
.SH "SEE ALSO"
.sp
lightning\-listinvoice(7), lightning\-delinvoice(7), lightning\-getroute(7), lightning\-invoice(7)\&.
.SH "RESOURCES"
.sp
Main web site: https://github\&.com/ElementsProject/lightning