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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,177 +1,91 @@ | ||
| /** | ||
| * Blob Capabilities. | ||
| * | ||
| * Blob is a fixed size byte array addressed by the multihash. | ||
| * Usually blobs are used to represent set of IPLD blocks at different byte ranges. | ||
| * The blob protocol allows authorized agents allocate memory space on a storage | ||
| * node and subsequently verify the content has been accepted by / delivered to | ||
| * said node. | ||
| * | ||
| * These can be imported directly with: | ||
| * ```js | ||
| * import * as Blob from '@storacha/capabilities/blob' | ||
| * import * as Index from '@storacha/capabilities/blob' | ||
| * ``` | ||
| * | ||
| * @module | ||
| * @see https://github.com/storacha/specs/blob/main/w3-blob.md | ||
| */ | ||
| import { equals } from 'uint8arrays/equals' | ||
| import { capability, Schema, fail, ok } from '@ucanto/validator' | ||
| import { equalBlob, equalWith, SpaceDID } from './utils.js' | ||
|
|
||
| /** | ||
| * Agent capabilities for Blob protocol | ||
| */ | ||
| import { capability, Schema, Link, ok } from '@ucanto/validator' | ||
| import { content } from './space/blob.js' | ||
| import { | ||
| equalBlob, | ||
| equalWith, | ||
| SpaceDID, | ||
| and, | ||
| equal, | ||
| checkLink, | ||
| Await, | ||
| } from './utils.js' | ||
|
|
||
| /** | ||
| * Capability can only be delegated (but not invoked) allowing audience to | ||
| * derived any `space/blob/` prefixed capability for the (memory) space identified | ||
| * by DID in the `with` field. | ||
| * derive any `blob/` prefixed capability. | ||
| */ | ||
| export const blob = capability({ | ||
| can: 'space/blob/*', | ||
| /** | ||
| * DID of the (memory) space where Blob is intended to | ||
| * be stored. | ||
| */ | ||
| with: SpaceDID, | ||
| can: 'blob/*', | ||
| /** Storage provider DID. */ | ||
| with: Schema.did(), | ||
| derives: equalWith, | ||
| }) | ||
|
|
||
| /** | ||
| * Blob description for being ingested by the service. | ||
| */ | ||
| export const content = Schema.struct({ | ||
| /** | ||
| * A multihash digest of the blob payload bytes, uniquely identifying blob. | ||
| */ | ||
| digest: Schema.bytes(), | ||
| /** | ||
| * Number of bytes contained by this blob. Service will provision write target | ||
| * for this exact size. Attempt to write a larger Blob file will fail. | ||
| */ | ||
| size: Schema.integer(), | ||
| }) | ||
|
|
||
| /** | ||
| * `space/blob/add` capability allows agent to store a Blob into a (memory) space | ||
| * identified by did:key in the `with` field. Agent should compute blob multihash | ||
| * and size and provide it under `nb.blob` field, allowing a service to provision | ||
| * a write location for the agent to PUT desired Blob into. | ||
| * The `blob/allocate` capability can be invoked to create a memory address on a | ||
| * storage node where blob content can be written via a HTTP PUT request. | ||
| */ | ||
| export const add = capability({ | ||
| can: 'space/blob/add', | ||
| /** | ||
| * DID of the (memory) space where Blob is intended to | ||
| * be stored. | ||
| */ | ||
| with: SpaceDID, | ||
| export const allocate = capability({ | ||
| can: 'blob/allocate', | ||
| /** Storage provider DID. */ | ||
| with: Schema.did(), | ||
| nb: Schema.struct({ | ||
| /** | ||
| * Blob to be added on the space. | ||
| */ | ||
| /** Blob to allocate. */ | ||
| blob: content, | ||
| /** Link to the add blob task that initiated the allocation. */ | ||
| cause: Link, | ||
| /** DID of the user space where the allocation takes place. */ | ||
| space: SpaceDID, | ||
| }), | ||
| derives: equalBlob, | ||
| }) | ||
|
|
||
| /** | ||
| * Capability can be used to remove the stored Blob from the (memory) | ||
| * space identified by `with` field. | ||
| */ | ||
| export const remove = capability({ | ||
| can: 'space/blob/remove', | ||
| /** | ||
| * DID of the (memory) space where Blob is stored. | ||
| */ | ||
| with: SpaceDID, | ||
| nb: Schema.struct({ | ||
| /** | ||
| * A multihash digest of the blob payload bytes, uniquely identifying blob. | ||
| */ | ||
| digest: Schema.bytes(), | ||
| }), | ||
| derives: (claimed, delegated) => { | ||
| if (claimed.with !== delegated.with) { | ||
| return fail( | ||
| `Expected 'with: "${delegated.with}"' instead got '${claimed.with}'` | ||
| ) | ||
| } else if ( | ||
| delegated.nb.digest && | ||
| !equals(delegated.nb.digest, claimed.nb.digest) | ||
| ) { | ||
| return fail( | ||
| `Link ${ | ||
| claimed.nb.digest ? `${claimed.nb.digest}` : '' | ||
| } violates imposed ${delegated.nb.digest} constraint.` | ||
| ) | ||
| } | ||
| return ok({}) | ||
| }, | ||
| }) | ||
|
|
||
| /** | ||
| * Capability can be invoked to request a list of stored Blobs in the | ||
| * (memory) space identified by `with` field. | ||
| */ | ||
| export const list = capability({ | ||
| can: 'space/blob/list', | ||
| /** | ||
| * DID of the (memory) space where Blobs to be listed are stored. | ||
| */ | ||
| with: SpaceDID, | ||
| nb: Schema.struct({ | ||
| /** | ||
| * A pointer that can be moved back and forth on the list. | ||
| * It can be used to paginate a list for instance. | ||
| */ | ||
| cursor: Schema.string().optional(), | ||
| /** | ||
| * Maximum number of items per page. | ||
| */ | ||
| size: Schema.integer().optional(), | ||
| }), | ||
| derives: (claimed, delegated) => { | ||
| if (claimed.with !== delegated.with) { | ||
| return fail( | ||
| `Expected 'with: "${delegated.with}"' instead got '${claimed.with}'` | ||
| ) | ||
| } | ||
| return ok({}) | ||
| }, | ||
| derives: (claimed, delegated) => ( | ||
| and(equalWith(claimed, delegated)) || | ||
| and(equalBlob(claimed, delegated)) || | ||
| and(checkLink(claimed.nb.cause, delegated.nb.cause, 'cause')) || | ||
| and(equal(claimed.nb.space, delegated.nb.space, 'space')) || | ||
| ok({}) | ||
| ), | ||
| }) | ||
|
|
||
| /** | ||
| * Capability can be used to get the stored Blob from the (memory) | ||
| * space identified by `with` field. | ||
| * The `blob/accept` capability invocation should either succeed when content is | ||
| * delivered on allocated address or fail if no content is allocation expires | ||
| * without content being delivered. | ||
| */ | ||
| export const get = capability({ | ||
| can: 'space/blob/get/0/1', | ||
| /** | ||
| * DID of the (memory) space where Blob is stored. | ||
| */ | ||
| with: SpaceDID, | ||
| export const accept = capability({ | ||
| can: 'blob/accept', | ||
| /** Storage provider DID. */ | ||
| with: Schema.did(), | ||
| nb: Schema.struct({ | ||
| /** | ||
| * A multihash digest of the blob payload bytes, uniquely identifying blob. | ||
| */ | ||
| digest: Schema.bytes(), | ||
| /** Blob to accept. */ | ||
| blob: content, | ||
| /** DID of the user space where allocation took place. */ | ||
| space: SpaceDID, | ||
| /** This task is blocked on `http/put` receipt available */ | ||
| _put: Await, | ||
| }), | ||
| derives: (claimed, delegated) => { | ||
| if (claimed.with !== delegated.with) { | ||
| return fail( | ||
| `Expected 'with: "${delegated.with}"' instead got '${claimed.with}'` | ||
| ) | ||
| } else if ( | ||
| delegated.nb.digest && | ||
| !equals(delegated.nb.digest, claimed.nb.digest) | ||
| ) { | ||
| return fail( | ||
| `Link ${ | ||
| claimed.nb.digest ? `${claimed.nb.digest}` : '' | ||
| } violates imposed ${delegated.nb.digest} constraint.` | ||
| ) | ||
| } | ||
| return ok({}) | ||
| }, | ||
| derives: (claimed, delegated) => ( | ||
| and(equalWith(claimed, delegated)) || | ||
| and(equalBlob(claimed, delegated)) || | ||
| and(equal(claimed.nb.space, delegated.nb.space, 'space')) || | ||
| ok({}) | ||
| ), | ||
| }) | ||
|
|
||
| // ⚠️ We export imports here so they are not omitted in generated typedefs | ||
| // @see https://github.com/microsoft/TypeScript/issues/51548 | ||
| export { Schema } | ||
| export { Schema, Link } |
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