manifest

type ChunkMeta struct {
	Index int    `json:"index"` // chunk index
	Hash  string `json:"hash"`  // SHA256 of plaintext chunk
	Size  int    `json:"size"`  // size of chunk in bytes
}

type FarmerInfo struct {
	Index    int    `json:"index"`    // farmer index (0-5)
	Address  string `json:"address"`  // farmer wallet address
	Endpoint string `json:"endpoint"` // HTTP endpoint (e.g., "https://farmer1.dbxn.io:4433")
	Region   string `json:"region"`   // geographic region (e.g., "us-east-1")
}

type Manifest struct {
	Version          string       `json:"version"`            // manifest version
	BlobID           string       `json:"blob_id"`            // unique blob identifier
	FileName         string       `json:"file_name"`          // original file name
	FileSize         int64        `json:"file_size"`          // original file size in bytes
	OriginalFileHash string       `json:"original_file_hash"` // SHA256 hash of original file
	ChunkSize        int          `json:"chunk_size"`         // size of each chunk in bytes
	ChunkCount       int          `json:"chunk_count"`        // total number of chunks
	DataShards       int          `json:"data_shards"`        // 4 data shards per chunk
	ParityShards     int          `json:"parity_shards"`      // 2 parity shards per chunk
	TotalShards      int          `json:"total_shards"`       // 6 total shards per chunk
	Chunks           []ChunkMeta  `json:"chunks"`             // metadata for each chunk
	Shards           []ShardMeta  `json:"shards"`             // metadata for each shard
	Farmers          []FarmerInfo `json:"farmers"`            // list of farmers storing the chunks
	EncryptionKey    string       `json:"encryption_key"`     // hex-encoded encryption key for chunks
	CreatedAt        time.Time    `json:"created_at"`         // timestamp of manifest creation
	PublisherAddress string       `json:"publisher_address"`  // address of the publisher
}

type ShardMeta struct {
	ChunkIndex  int    `json:"chunk_index"`  // which chunk (0-99)
	ShardIndex  int    `json:"shard_index"`  // which shard (0-5)
	Hash        string `json:"hash"`         // SHA256 of shard
	Size        int    `json:"size"`         // shard size in bytes
	FarmerIndex int    `json:"farmer_index"` // which farmer stores this
}