Examples of peer to peer with holepunch.
Hyperswarm allows multiple peers to connect who are announcing a common topic. Peers are identified by a public key, not an IP address. The same peer public keys work between different networks.
The following is an example of the lower level interface inside hyperswarm, the hyperswarm DHT.
In a terminal, start the server at /1/server.mjs:
$ node 1/server.mjs
listening on: e592476d8b5d8a7a0278d1d9f5d97aa48b4deb2534f2c81ac7add47ea4d075d4
On a second terminal instance, start the client at /1/client.mjs:
$ node 1/client.mjs e592476d8b5d8a7a0278d1d9f5d97aa48b4deb2534f2c81ac7add47ea4d075d4
Connecting to: e592476d8b5d8a7a0278d1d9f5d97aa48b4deb2534f2c81ac7add47ea4d075d4
got connection!
Once connected, type something in the second terminal:
$ node 1/client.mjs e592476d8b5d8a7a0278d1d9f5d97aa48b4deb2534f2c81ac7add47ea4d075d4
Connecting to: e592476d8b5d8a7a0278d1d9f5d97aa48b4deb2534f2c81ac7add47ea4d075d4
got connection!
Hello
Go back to the first terminal and you will see the connection message and the input from the second terminal as well:
$ node 1/server.mjs
listening on: e592476d8b5d8a7a0278d1d9f5d97aa48b4deb2534f2c81ac7add47ea4d075d4
got connection!
Hello
Using Hyperswarm provides a higher level interface to manage the connecting and disconnecting of peers within the hyperswarm DHT.
In a terminal, start the first peer at /2/peer.mjs:
$ node 2/peer.mjs
joined topic: 155c8b340ab95eca5a2bc72a1d2a2befcbe6b2e9a8805f205efb49f497122684
In a second terminal, start the second peer with the same file, plus adding the topic provided in the first terminal as an argument:
$ node 2/peer.mjs 155c8b340ab95eca5a2bc72a1d2a2befcbe6b2e9a8805f205efb49f497122684
* got a connection from: 3372cbf25288b9fb751055b9e09c0f68160f9bde1e8958bd4237dad9beacd574 *
joined topic: 155c8b340ab95eca5a2bc72a1d2a2befcbe6b2e9a8805f205efb49f497122684
Back in the first peer terminal:
$ node 2/peer.mjs
joined topic: 155c8b340ab95eca5a2bc72a1d2a2befcbe6b2e9a8805f205efb49f497122684
* got a connection from: ffe00aca0a63c0e12a2ed8bbc3eab2802472d69e4b7de97c621ddea2223313f3 *
One file, same functionality for one or more peers.
As long as peers are online and connected at the same time, they can exchange chat messages in examples 1 and 2. What's lacking is persistence, provided next by hypercore, to where the messages can be stored locally by the publishing peer while offline, then synced with subscribing peers when connected again over hyperswarm.
In this example there are two files, writer.mjs and reader.mjs, each with their own terminal.
The writer takes input from the terminal and persists it in a local directory, /writer-storage, then replicates the data over hyperswarm.
The reader syncs with the writer hypercore over hyperswarm and persists the data locally to /reader-storage.
In the writer terminal:
$ node 3/writer.mjs
hypercore key: df23c949e4b498af6fa8a84b7e31edb81d85e6420a6b759ba2289978fa270387
In the reader terminal:
$ node 3/reader.mjs df23c949e4b498af6fa8a84b7e31edb81d85e6420a6b759ba2289978fa270387
Skipping 0 earlier blocks...
In the writer terminal, type something and press enter:
$ node 3/writer.mjs
hypercore key: df23c949e4b498af6fa8a84b7e31edb81d85e6420a6b759ba2289978fa270387
asdasd
In the reader terminal:
$ node 3/reader.mjs df23c949e4b498af6fa8a84b7e31edb81d85e6420a6b759ba2289978fa270387
Skipping 0 earlier blocks...
Block 0: asdasd
A corestore is a way to store and sync multiple hypercores.
In this example there are two files, writer.mjs and reader.mjs, each with their own terminal.
In the writer terminal:
$ node 4/writer.mjs
main core key: 259008471a3acd890a50463e75b8621827b0657198d951c10a37e592409f546a
In the reader terminal:
$ node 4/reader.mjs 259008471a3acd890a50463e75b8621827b0657198d951c10a37e592409f546a
In the writer terminal, type in 5 or 6 letters and press enter:
$ node 4/writer.mjs
main core key: 259008471a3acd890a50463e75b8621827b0657198d951c10a37e592409f546a
asdasd
appending long data to core3
In the reader terminal:
$ node 4/reader.mjs 259008471a3acd890a50463e75b8621827b0657198d951c10a37e592409f546a
Block 0 in Core 9aa203ef79062648ebc387f1b3f2df659f04b9b235b10d8d36cbf3f9d4821340: asdasd
In the writer terminal, type in 2 letters and press enter:
$ node 4/writer.mjs
main core key: 259008471a3acd890a50463e75b8621827b0657198d951c10a37e592409f546a
asdasd
appending long data to core3
as
appending short data to core2
In the reader terminal:
$ node 4/reader.mjs 259008471a3acd890a50463e75b8621827b0657198d951c10a37e592409f546a
Block 0 in Core 9aa203ef79062648ebc387f1b3f2df659f04b9b235b10d8d36cbf3f9d4821340: asdasd
Block 0 in Core 9d20834415b44467b1154aeffc936c1cbec8fba5c2699bdea2cdaf00fc8503d2: as
In the writer terminal:
$ node 5/writer.mjs
importing dictionary...
bee key: b6efe1cacf08d4f145efcd2781e5351c37f276a284fb3555f87ed6be69e56fff
In the bee reader terminal:
node 5/bee-reader.mjs
core key here is: b6efe1cacf08d4f145efcd2781e5351c37f276a284fb3555f87ed6be69e56fff
In the bee reader terminal, enter a word from the dictionary. In the following example we looked up 'brick':
node 5/bee-reader.mjs
core key here is: b6efe1cacf08d4f145efcd2781e5351c37f276a284fb3555f87ed6be69e56fff
brick
brick
-> 1. A block or clay tempered with water, sand, etc., molded into a regular form, usually rectangular, and sun-dried, or burnt in a kiln, or in a heap or stack called a clamp. The Assyrians appear to have made much less use of bricks baked in the furnace than the Babylonians. Layard. 2. Bricks, collectively, as designating that kind of material; as, a load of brick; a thousand of brick. Some of Palladio's finest examples are of brick. Weale. 3. Any oblong rectangular mass; as, a brick of maple sugar; a penny brick (of bread). 4. A good fellow; a merry person; as, you 're a brick. [Slang] "He 's a dear little brick." Thackeray. To have a brick in one's hat, to be drunk. [Slang] Note: Brick is used adjectively or in combination; as, brick wall; brick clay; brick color; brick red. Brick clay, clay suitable for, or used in making, bricks. -- Brick dust, dust of pounded or broken bricks. -- Brick earth, clay or earth suitable for,
or used in making, bricks. -- Brick loaf, a loaf of bread somewhat resembling a brick in shape. -- Brick nogging (Arch.), rough brickwork used to fill in the spaces between the uprights of a wooden partition; brick filling. -- Brick tea, tea leaves and young shoots, or refuse tea, steamed or mixed with fat, etc., and pressed into the form of bricks. It is used in Northern and Central Asia. S. W. Williams. -- Brick trimmer (Arch.), a brick arch under a hearth, usually within the thickness of a wooden floor, to guard against accidents by fire. -- Brick trowel. See Trowel. -- Brick works, a place where bricks are made. -- Bath brick. See under Bath, a city. -- Pressed brick, bricks which, before burning, have been subjected to pressure, to free them from the imperfections of shape and texture which are common in molded bricks.
1. To lay or pave with bricks; to surround, line, or construct with bricks. 2. To imitate or counterfeit a brick wall on, as by smearing plaster with red ocher, making the joints with an edge tool, and pointing them. To brick up, to fill up, inclose, or line, with brick.
In the core reader terminal:
node 5/core-reader.mjs b6efe1cacf08d4f145efcd2781e5351c37f276a284fb3555f87ed6be69e56fff
Raw Block 102217: <Buffer 0a ea 01 0a 38 0a 10 a8 1e aa 09 ed ae 01 bd 01 4e e9 3c 92 13 f1 04 12 24 c4 9e 06 01 ad 9e 06 01 c2 9e 06 01 bd 9e 06 01 a9 9e 06 01 c8 9e 06 01 c7 ... 227 more bytes>
Decoded Block 102217 {
index: <Buffer 0a 38 0a 10 a8 1e aa 09 ed ae 01 bd 01 4e e9 3c 92 13 f1 04 12 24 c4 9e 06 01 ad 9e 06 01 c2 9e 06 01 bd 9e 06 01 a9 9e 06 01 c8 9e 06 01 c7 9e 06 01 ... 184 more bytes>,
key: <Buffer 73 69 6c 6b 6e 65 73 73>,
value: <Buffer 53 69 6c 6b 69 6e 65 73 73 2e 20 5b 4f 62 73 2e 5d 20 42 2e 20 4a 6f 6e 73 6f 6e 2e>