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LIGHTNING-INVOICE(7)
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====================
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:doctype: manpage
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NAME
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----
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lightning-invoice - Command for accepting payments.
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SYNOPSIS
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--------
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*invoice* 'msatoshi' 'label' 'description' ['expiry'] ['fallbacks'] ['preimage']
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DESCRIPTION
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-----------
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The *invoice* RPC command creates the expectation of a payment of a
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given amount of milli-satoshi: it returns a unique token which another
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lightning daemon can use to pay this invoice.
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The 'msatoshi' can be the string "any", which creates an invoice
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that can be paid with any amount.
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The 'label' must be a unique string or number (which is treated as a
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string, so "01" is different from "1"); it is never revealed to other
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nodes on the lightning network, but it can be used to query the status
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of this invoice.
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The 'description' is a short description of purpose of payment,
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e.g. '1 cup of coffee'. This value is encoded into the BOLT11 invoice
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and is viewable by any node you send this invoice to. It must be
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UTF-8, and cannot use '\u' JSON escape codes.
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The 'expiry' is optionally the number of seconds the invoice is valid for.
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If no value is provided the default of 3600 (1 Hour) is used.
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The 'fallbacks' array is one or more fallback addresses to include in
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the invoice (in order from most-preferred to least): note that these
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arrays are not currently tracked to fulfill the invoice.
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The 'preimage' is a 64-digit hex string to be used as payment preimage
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for the created invoice.
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By default, if unspecified, lightningd will generate a secure
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pseudorandom preimage seeded from an appropriate entropy source on
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your system.
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*IMPORTANT*: if you specify the 'preimage', you are responsible, to
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ensure appropriate care for generating using a secure pseudorandom
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generator seeded with sufficient entropy, and keeping the preimage
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secret.
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This parameter is an advanced feature intended for use with cutting-edge
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cryptographic protocols and should not be used unless explicitly needed.
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RETURN VALUE
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------------
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On success, a hash is returned as 'payment_hash' to be given to the payer,
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and the 'expiry_time' as a UNIX timestamp.
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It also returns a BOLT11 invoice as 'bolt11' to be given to the
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payer.
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On failure, an error is returned and no invoice is created. If the
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lightning process fails before responding, the caller should use
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lightning-listinvoice(7) to query whether this invoice was created or not.
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The following error codes may occur:
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* -1. Catchall nonspecific error.
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* 900. An invoice with the given 'label' already exists.
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* 901. An invoice with the given 'preimage' already exists.
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AUTHOR
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------
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Rusty Russell <rusty@rustcorp.com.au> is mainly responsible.
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SEE ALSO
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--------
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lightning-listinvoice(7), lightning-delinvoice(7),
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lightning-getroute(7), lightning-sendpay(7).
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RESOURCES
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---------
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Main web site: https://github.com/ElementsProject/lightning
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