Description of the BrainShare Protocol
The BrainShare Protocol is defined by the use of a specific VerifiableCredential and content format, and optionally specifying that credential in a DID Document.
The credential's type field MUST be ["VerifiableCredential", "BrainSharePost"]
As defined in the context, the credentialSubject MUST include a field message, which is a Markdown string that can also contain a special codeblock type allowing it to embed or reference other verifiable credentials, using the following formats:
'''vc+jwt
neyJhbGciOiJFZERTQSIsInR5cCI6IkpXVCJ9.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.kF72OisEL5jYR6R3O4VTZU751gfL44kfshW7Q0WXzTH2Q1jNro13gkUOpGEf9Ei5UkPWg-xRXNS7qEuwbQmtBw
'''
'''vc+json+ld
TODO: POST JSON-LD CREDENTIAL HERE
'''
'''vc+multihash
qz1311d142sdf894189a142
'''
The Markdown can also include "WikiLinks" in order to reference other BrainShare posts by name rather than hash. This can allow a Post to stay "up to date" even when referenced posts are updated (this might not always be preferrable, but likely so when building a "wiki"). To reference a post this way, the following syntax can be used:
This is a link to the great post called [[did:example:123#brain-share-1 My Great Post]]
This post is discovered by checking an "index" file specified in the Service Endpoint referenced (e.g. did:example:123#brain-share-1). This index file MUST be a simple mapping of strings to arrays of multihash strings. The array contains all revisions (in reverse chronological order) of the named Post.
Index Example:
{
"My Great Post": ["qz2342342424", "qa897987"],
"Science": ["qz1234555555"]
}
Credential Example:
'''json+vc
{
"credentialSubject": {
"post": "Referencing another post:\n\n```vc+jwt\neyJhbGciOiJFZERTQSIsInR5cCI6IkpXVCJ9.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.kF72OisEL5jYR6R3O4VTZU751gfL44kfshW7Q0WXzTH2Q1jNro13gkUOpGEf9Ei5UkPWg-xRXNS7qEuwbQmtBw\n```",
"id": "did:peer:2.Ez6LSruSrHbF7upkkTBEfdM4qUUgo2xvgPshC73rL7WFDFnff.Vz6MkhPBpa7Vz68Jw5MusgxKMaiJxgU3rSPFCgRvHK68ReJMw.SeyJpZCI6IjEyMzQiLCJ0IjoiZG0iLCJzIjoiZGlkOndlYjpkZXYtZGlkY29tbS1tZWRpYXRvci5oZXJva3VhcHAuY29tIiwiZGVzY3JpcHRpb24iOiJhIERJRENvbW0gZW5kcG9pbnQifQ"
},
"issuer": {
"id": "did:peer:2.Ez6LSruSrHbF7upkkTBEfdM4qUUgo2xvgPshC73rL7WFDFnff.Vz6MkhPBpa7Vz68Jw5MusgxKMaiJxgU3rSPFCgRvHK68ReJMw.SeyJpZCI6IjEyMzQiLCJ0IjoiZG0iLCJzIjoiZGlkOndlYjpkZXYtZGlkY29tbS1tZWRpYXRvci5oZXJva3VhcHAuY29tIiwiZGVzY3JpcHRpb24iOiJhIERJRENvbW0gZW5kcG9pbnQifQ"
},
"type": [
"VerifiableCredential",
"BrainsharePost"
],
"@context": [
"https://www.w3.org/2018/credentials/v1"
],
"issuanceDate": "2023-09-13T01:20:24.000Z",
"proof": {
"type": "JwtProof2020",
"jwt": "eyJhbGciOiJFZERTQSIsInR5cCI6IkpXVCJ9.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.W5G8ejIWdE9RKmZEQUxDnGxqg2rwCcIz4bExl6XOOPjk5S1nz1KAILZAAJ0Oy6yj7ufQw-DLJ9cRbBrQTqIaBA"
}
}
'''
for spec rendering purposes the code blocks above uses single quotes instead of backticks
Because the content linked in the credential can include links to other credentials (including other BrainSharePost Credentials), this Credential type can be used as a "node" in a "knowledge graph", but not restricted to 1 user/organization. Knowledge graphs (i.e. "second brains", e.g. Notion) of different entities can overlap and intersect publicly.
To make a BrainShare public/discoverable, it is useful to include a link to the "root" BrainShareNode in a DID Document Service, as well as the index if "wikileaks" support is intended.
{
"service": [{
"id":"did:example:123#brain-share-1",
"type": "BrainShareRoot",
"root": "zq781628712687",
"index": "zq12342314324234"
}]
}