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Update waku.md

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Dean Eigenmann 2019-11-25 06:22:57 +01:00 committed by GitHub
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@ -263,9 +263,9 @@ A mailserver SHOULD store envelopes for all topics to be generally useful for an
#### Requesting messages #### Requesting messages
In order to request historic messages, a node MUST send a packet P2P Request (`0x7e`) to a peer providing mailserver functionality. This packet requires one argument which MUST be a Whisper envelope. In order to request historic messages, a node MUST send a packet P2P Request (`0x7e`) to a peer providing mailserver functionality. This packet requires one argument which MUST be a Waku envelope.
In the Whisper envelope's payload section, there MUST be RLP-encoded information about the details of the request: In the Waku envelope's payload section, there MUST be RLP-encoded information about the details of the request:
``` ```
[ Lower, Upper, Bloom, Limit, Cursor ] [ Lower, Upper, Bloom, Limit, Cursor ]
@ -273,7 +273,7 @@ In the Whisper envelope's payload section, there MUST be RLP-encoded information
`Lower`: 4-byte wide unsigned integer (UNIX time in seconds; oldest requested envelope's creation time) `Lower`: 4-byte wide unsigned integer (UNIX time in seconds; oldest requested envelope's creation time)
`Upper`: 4-byte wide unsigned integer (UNIX time in seconds; newest requested envelope's creation time) `Upper`: 4-byte wide unsigned integer (UNIX time in seconds; newest requested envelope's creation time)
`Bloom`: 64-byte wide array of Whisper topics encoded in a bloom filter to filter envelopes `Bloom`: 64-byte wide array of Waku topics encoded in a bloom filter to filter envelopes
`Limit`: 4-byte wide unsigned integer limiting the number of returned envelopes `Limit`: 4-byte wide unsigned integer limiting the number of returned envelopes
`Cursor`: 32-byte wide array of a cursor returned from the previous request (optional) `Cursor`: 32-byte wide array of a cursor returned from the previous request (optional)
@ -283,11 +283,11 @@ The envelope MUST be signed with a symmetric key agreed between the requester an
#### Receiving historic messages #### Receiving historic messages
Historic messages MUST be sent to a peer as a packet with a P2P Message code (`0x7f`) followed by an array of Whisper envelopes. It is incompatible with the original Whisper spec (EIP-627) because it allows only a single envelope, however, an array of envelopes is much more performant. In order to stay compatible with EIP-627, a peer receiving historic message MUST handle both cases. Historic messages MUST be sent to a peer as a packet with a P2P Message code (`0x7f`) followed by an array of Waku envelopes. It is incompatible with the original Whisper spec (EIP-627) because it allows only a single envelope, however, an array of envelopes is much more performant. In order to stay compatible with EIP-627, a peer receiving historic message MUST handle both cases.
In order to receive historic messages from a mailserver, a node MUST trust the selected mailserver, that is allow to receive packets with the P2P Message code. By default, such packets are discarded. In order to receive historic messages from a mailserver, a node MUST trust the selected mailserver, that is allow to receive packets with the P2P Message code. By default, such packets are discarded.
Received envelopes MUST be passed through the Whisper envelopes pipelines so that they are picked up by registered filters and passed to subscribers. Received envelopes MUST be passed through the Waku envelopes pipelines so that they are picked up by registered filters and passed to subscribers.
## Backwards Compatibility ## Backwards Compatibility