contracts

Snapper

The data storage part of the whole Snapper app.

Logics like generating snapshot image / delta file and calling takeSnapshot are handled by the Lambda part. latestSnapshotInfo is the only method clients should care about.

Functions

constructor() (public)

Create Snapper contract.

initRegion(uint256 regionId, uint256 initBlock_, string snapshotCid_) (external)

Intialize the region before taking further snapshots.

Emits {Snapshot} event which used by Clients to draw initial picture.

takeSnapshot(uint256 regionId, uint256 lastSnapshotBlock_, uint256 targetSnapshotBlock_, string snapshotCid_, string deltaCid_) (external)

Take a snapshot on the region.

Emits {Snapshot} and {Delta} events.

latestSnapshotInfo() → struct Snapper.SnapshotInfo (external)

Get region 0 lastest snapshot info.

latestSnapshotInfo(uint256 regionId) → struct Snapper.SnapshotInfo (external)

Get the lastest snapshot info by region.

Events

Snapshot(uint256 regionId, uint256 block, string cid)

New snapshot is taken.

For more information see https://gist.github.com/zxygentoo/6575a49ff89831cdd71598d49527278b

Delta(uint256 regionId, uint256 block, string cid)

New delta is generated.

For more information see https://gist.github.com/zxygentoo/6575a49ff89831cdd71598d49527278b

SnapshotInfo

uint256 block

string cid

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