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* Enables `libp2p-kad-dht` in client mode * Updates types with new DHT events BREAKING CHANGE: The DHT API has been refactored to return async iterators of query events
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,119 @@ | ||
| import { fromString as uint8ArrayFromString } from 'uint8arrays/from-string' | ||
| import { | ||
| SendingQuery, | ||
| PeerResponse, | ||
| FinalPeer, | ||
| QueryError, | ||
| Provider, | ||
| Value, | ||
| AddingPeer, | ||
| DialingPeer | ||
| } from './response-types.js' | ||
| import { Multiaddr } from 'multiaddr' | ||
|
|
||
| /** | ||
| * @param {{Type: number, ID: string, Extra: string, Responses: {ID: string, Addrs: string[]}[]}} event | ||
| * @returns {import('ipfs-core-types/src/dht').QueryEvent} | ||
| */ | ||
| export const mapEvent = (event) => { | ||
| // console.info(JSON.stringify(event, null, 2)) | ||
|
|
||
| if (event.Type === SendingQuery) { | ||
| return { | ||
| to: event.ID, | ||
| name: 'SENDING_QUERY', | ||
| type: event.Type | ||
| } | ||
| } | ||
|
|
||
| if (event.Type === PeerResponse) { | ||
| return { | ||
| from: event.ID, | ||
| name: 'PEER_RESPONSE', | ||
| type: event.Type, | ||
| // TODO: how to infer this from the go-ipfs response | ||
| messageType: 0, | ||
| // TODO: how to infer this from the go-ipfs response | ||
| messageName: 'PUT_VALUE', | ||
| closer: (event.Responses || []).map(({ ID, Addrs }) => ({ id: ID, multiaddrs: Addrs.map(addr => new Multiaddr(addr)) })), | ||
| providers: (event.Responses || []).map(({ ID, Addrs }) => ({ id: ID, multiaddrs: Addrs.map(addr => new Multiaddr(addr)) })) | ||
| // TODO: how to infer this from the go-ipfs response | ||
| // record: ??? | ||
| } | ||
| } | ||
|
|
||
| if (event.Type === FinalPeer) { | ||
| // dht.query ends with a FinalPeer event with no Responses | ||
| let peer = { | ||
| id: event.ID, | ||
| /** @type {Multiaddr[]} */ | ||
| multiaddrs: [] | ||
| } | ||
|
|
||
| if (event.Responses && event.Responses.length) { | ||
| // dht.findPeer has the result in the Responses field | ||
| peer = { | ||
| id: event.Responses[0].ID, | ||
| multiaddrs: event.Responses[0].Addrs.map(addr => new Multiaddr(addr)) | ||
| } | ||
| } | ||
|
|
||
| return { | ||
| from: event.ID, | ||
| name: 'FINAL_PEER', | ||
| type: event.Type, | ||
| peer | ||
| } | ||
| } | ||
|
|
||
| if (event.Type === QueryError) { | ||
| return { | ||
| from: event.ID, | ||
| name: 'QUERY_ERROR', | ||
| type: event.Type, | ||
| error: new Error(event.Extra) | ||
| } | ||
| } | ||
|
|
||
| if (event.Type === Provider) { | ||
| return { | ||
| from: event.ID, | ||
| name: 'PROVIDER', | ||
| type: event.Type, | ||
| providers: event.Responses.map(({ ID, Addrs }) => ({ id: ID, multiaddrs: Addrs.map(addr => new Multiaddr(addr)) })) | ||
| } | ||
| } | ||
|
|
||
| if (event.Type === Value) { | ||
| return { | ||
| from: event.ID, | ||
| name: 'VALUE', | ||
| type: event.Type, | ||
| value: uint8ArrayFromString(event.Extra, 'base64pad') | ||
| } | ||
| } | ||
|
|
||
| if (event.Type === AddingPeer) { | ||
| const peers = event.Responses.map(({ ID }) => ID) | ||
|
|
||
| if (!peers.length) { | ||
| throw new Error('No peer found') | ||
| } | ||
|
|
||
| return { | ||
| name: 'ADDING_PEER', | ||
| type: event.Type, | ||
| peer: peers[0] | ||
| } | ||
| } | ||
|
|
||
| if (event.Type === DialingPeer) { | ||
| return { | ||
| name: 'DIALING_PEER', | ||
| type: event.Type, | ||
| peer: event.ID | ||
| } | ||
| } | ||
|
|
||
| throw new Error('Unknown DHT event type') | ||
| } |
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