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add resourceunavailable error code with more guidance

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Danny Ryan 2021-05-21 14:14:29 -06:00
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1 changed files with 7 additions and 2 deletions
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specs/phase0/p2p-interface.md
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@ -567,6 +567,9 @@ The response code can have one of the following values, encoded as a single unsi
The response payload adheres to the `ErrorMessage` schema (described below). The response payload adheres to the `ErrorMessage` schema (described below).
- 2: **ServerError** -- the responder encountered an error while processing the request. - 2: **ServerError** -- the responder encountered an error while processing the request.
The response payload adheres to the `ErrorMessage` schema (described below). The response payload adheres to the `ErrorMessage` schema (described below).
- 3: **ResourceUnavailable** -- the responder does not have requested resource.
The response payload adheres to the `ErrorMessage` schema (described below).
*Note*: This response code is only valid as a response to `BlocksByRange`.
Clients MAY use response codes above `128` to indicate alternative, erroneous request-specific responses. Clients MAY use response codes above `128` to indicate alternative, erroneous request-specific responses.
@ -752,8 +755,10 @@ Clients MUST keep a record of signed blocks seen on the epoch range
where `current_epoch` is defined by the current wall-clock time, where `current_epoch` is defined by the current wall-clock time,
and clients MUST support serving requests of blocks on this range. and clients MUST support serving requests of blocks on this range.
Peers that are unable to reply to block requests within the Peers that are unable to reply to block requests within the `MIN_EPOCHS_FOR_BLOCK_REQUESTS`
`MIN_EPOCHS_FOR_BLOCK_REQUESTS` epoch range MAY get descored or disconnected at any time. epoch range SHOULD respond with error code `3: **ResourceUnavailable**`.
Such peers that are unable to successfully reply to this range of requests MAY get descored
or disconnected at any time.
*Note*: The above requirement implies that nodes that start from a recent weak subjectivity checkpoint *Note*: The above requirement implies that nodes that start from a recent weak subjectivity checkpoint
MUST backfill the local block database to at least epoch `current_epoch - MIN_EPOCHS_FOR_BLOCK_REQUESTS` MUST backfill the local block database to at least epoch `current_epoch - MIN_EPOCHS_FOR_BLOCK_REQUESTS`