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feat: async peerstore backed by datastores (#1058)

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We have a peerstore that keeps all data for all observed peers in memory with no eviction.

This is fine when you don't discover many peers but when using the DHT you encounter a significant number of peers so our peer storage grows and grows over time.

We have a persistent peer store, but it just periodically writes peers into the datastore to be read at startup, still keeping them in memory.

It also means a restart doesn't give you any temporary reprieve from the memory leak as the previously observed peer data is read into memory at startup.

This change refactors the peerstore to use a datastore by default, reading and writing peer info as it arrives.  It can be configured with a MemoryDatastore if desired.

It was necessary to change the peerstore and *book interfaces to be asynchronous since the datastore api is asynchronous.

BREAKING CHANGE: `libp2p.handle`, `libp2p.registrar.register` and the peerstore methods have become async
This commit is contained in:
Alex Potsides
2022-01-20 12:03:35 +00:00
committed by GitHub
parent 0a4dc54d08
commit 978eb3676f
94 changed files with 3263 additions and 4039 deletions
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2
examples/protocol-and-stream-muxing/1.js
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@ -31,7 +31,7 @@ const createNode = async () => {
])
// Add node's 2 data to the PeerStore
node1.peerStore.addressBook.set(node2.peerId, node2.multiaddrs)
await node1.peerStore.addressBook.set(node2.peerId, node2.multiaddrs)
// exact matching
node2.handle('/your-protocol', ({ stream }) => {

2
examples/protocol-and-stream-muxing/2.js
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@ -31,7 +31,7 @@ const createNode = async () => {
])
// Add node's 2 data to the PeerStore
node1.peerStore.addressBook.set(node2.peerId, node2.multiaddrs)
await node1.peerStore.addressBook.set(node2.peerId, node2.multiaddrs)
node2.handle(['/a', '/b'], ({ protocol, stream }) => {
pipe(

4
examples/protocol-and-stream-muxing/3.js
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@ -32,8 +32,8 @@ const createNode = async () => {
])
// Add node's 2 data to the PeerStore
node1.peerStore.addressBook.set(node2.peerId, node2.multiaddrs)
await node1.peerStore.addressBook.set(node2.peerId, node2.multiaddrs)
node1.handle('/node-1', ({ stream }) => {
pipe(
stream,

2
examples/protocol-and-stream-muxing/README.md
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@ -20,7 +20,7 @@ const node1 = nodes[0]
const node2 = nodes[1]
// Add node's 2 data to the PeerStore
node1.peerStore.addressBook.set(node2.peerId, node2.multiaddrs)
await node1.peerStore.addressBook.set(node2.peerId, node2.multiaddrs)
// Here we are telling libp2p that if someone dials this node to talk with the `/your-protocol`
// multicodec, the protocol identifier, please call this handler and give it the stream