lightning-sendpay -- Low-level command for sending a payment via a route ======================================================================== SYNOPSIS -------- **sendpay** *route* *payment\_hash* \[*label*\] \[*msatoshi*\] \[*bolt11*\] \[*payment_secret*\] \[*partid*\] DESCRIPTION ----------- The **sendpay** RPC command attempts to send funds associated with the given *payment\_hash*, along a route to the final destination in the route. Generally, a client would call lightning-getroute(7) to resolve a route, then use **sendpay** to send it. If it fails, it would call lightning-getroute(7) again to retry. The response will occur when the payment is on its way to the destination. The **sendpay** RPC command does not wait for definite success or definite failure of the payment. Instead, use the **waitsendpay** RPC command to poll or wait for definite success or definite failure. The *label* and *bolt11* parameters, if provided, will be returned in *waitsendpay* and *listsendpays* results. The *msatoshi* amount must be provided if *partid* is non-zero, otherwise it must be equal to the final amount to the destination. By default it is in millisatoshi precision; it can be a whole number, or a whole number ending in *msat* or *sat*, or a number with three decimal places ending in *sat*, or a number with 1 to 11 decimal places ending in *btc*. The *payment_secret* is the value that the final recipient requires to accept the payment, as defined by the `payment_data` field in BOLT 4 and the `s` field in the BOLT 11 invoice format. It is required if *partid* is non-zero. The *partid* value, if provided and non-zero, allows for multiple parallel partial payments with the same *payment_hash*. The *msatoshi* amount (which must be provided) for each **sendpay** with matching *payment_hash* must be equal, and **sendpay** will fail if there are already *msatoshi* worth of payments pending. Once a payment has succeeded, calls to **sendpay** with the same *payment\_hash* but a different *msatoshi* or destination will fail; this prevents accidental multiple payments. Calls to **sendpay** with the same *payment\_hash*, *msatoshi*, and destination as a previous successful payment (even if a different route or *partid*) will return immediately with success. RETURN VALUE ------------ [comment]: # (GENERATE-FROM-SCHEMA-START) On success, an object is returned, containing: - **id** (u64): unique ID for this payment attempt - **payment_hash** (hex): the hash of the *payment_preimage* which will prove payment (always 64 characters) - **status** (string): status of the payment (could be complete if already sent previously) (one of "pending", "complete") - **created_at** (u64): the UNIX timestamp showing when this payment was initiated - **amount_sent_msat** (msat): The amount sent - **groupid** (u64, optional): Grouping key to disambiguate multiple attempts to pay an invoice or the same payment_hash - **amount_msat** (msat, optional): The amount delivered to destination (if known) - **destination** (pubkey, optional): the final destination of the payment if known - **label** (string, optional): the *label*, if given to sendpay - **partid** (u64, optional): the *partid*, if given to sendpay - **bolt11** (string, optional): the bolt11 string (if supplied) - **bolt12** (string, optional): the bolt12 string (if supplied: **experimental-offers** only). If **status** is "complete": - **payment_preimage** (hex): the proof of payment: SHA256 of this **payment_hash** (always 64 characters) If **status** is "pending": - **message** (string): Monitor status with listpays or waitsendpay [comment]: # (GENERATE-FROM-SCHEMA-END) On error, if the error occurred from a node other than the final destination, the route table will be updated so that lightning-getroute(7) should return an alternate route (if any). An error from the final destination implies the payment should not be retried. The following error codes may occur: - -1: Catchall nonspecific error. - 201: Already paid with this *hash* using different amount or destination. - 202: Unparseable onion reply. The *data* field of the error will have an *onionreply* field, a hex string representation of the raw onion reply. - 203: Permanent failure at destination. The *data* field of the error will be routing failure object. - 204: Failure along route; retry a different route. The *data* field of the error will be routing failure object. A routing failure object has the fields below: - *erring\_index*. The index of the node along the route that reported the error. 0 for the local node, 1 for the first hop, and so on. - *erring\_node*. The hex string of the pubkey id of the node that reported the error. - *erring\_channel*. The short channel ID of the channel that has the error, or *0:0:0* if the destination node raised the error. In addition *erring\_direction* will indicate which direction of the channel caused the failure. - *failcode*. The failure code, as per BOLT \#4. - *channel\_update*. The hex string of the *channel\_update* message received from the remote node. Only present if error is from the remote node and the *failcode* has the UPDATE bit set, as per BOLT \#4. AUTHOR ------ Rusty Russell <> is mainly responsible. SEE ALSO -------- lightning-listinvoice(7), lightning-delinvoice(7), lightning-getroute(7), lightning-invoice(7), lightning-pay(7), lightning-waitsendpay(7). RESOURCES --------- Main web site: [comment]: # ( SHA256STAMP:44540ace609ccfa7b023526d7a92ba7cf4a6058f3ae2124c20fa65b92137e41b)