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read_blocks.go
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/
read_blocks.go
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package storage
import (
"context"
"fmt"
"github.com/rs/zerolog/log"
"github.com/onflow/flow-go/admin"
"github.com/onflow/flow-go/admin/commands"
"github.com/onflow/flow-go/model/flow"
"github.com/onflow/flow-go/state/protocol"
"github.com/onflow/flow-go/storage"
)
var _ commands.AdminCommand = (*ReadBlocksCommand)(nil)
type readBlocksRequest struct {
blocksRequest *blocksRequest
numBlocksToQuery uint64
}
type ReadBlocksCommand struct {
state protocol.State
blocks storage.Blocks
}
func (r *ReadBlocksCommand) Handler(ctx context.Context, req *admin.CommandRequest) (interface{}, error) {
data := req.ValidatorData.(*readBlocksRequest)
var result []*flow.Block
var blockID flow.Identifier
log.Info().Str("module", "admin-tool").Msgf("read blocks, data: %v", data)
if header, err := getBlockHeader(r.state, data.blocksRequest); err != nil {
return nil, fmt.Errorf("failed to get block header: %w", err)
} else {
blockID = header.ID()
}
for i := uint64(0); i < data.numBlocksToQuery; i++ {
block, err := r.blocks.ByID(blockID)
if err != nil {
return nil, fmt.Errorf("failed to get block by ID: %w", err)
}
result = append(result, block)
if block.Header.Height == 0 {
break
}
blockID = block.Header.ParentID
}
return commands.ConvertToInterfaceList(result)
}
// Validator validates the request.
// Returns admin.InvalidAdminReqError for invalid/malformed requests.
func (r *ReadBlocksCommand) Validator(req *admin.CommandRequest) error {
input, ok := req.Data.(map[string]interface{})
if !ok {
return admin.NewInvalidAdminReqFormatError("expected map[string]any")
}
block, ok := input["block"]
if !ok {
return admin.NewInvalidAdminReqErrorf("the \"block\" field is required")
}
data := &readBlocksRequest{}
if blocksRequest, err := parseBlocksRequest(block); err != nil {
return admin.NewInvalidAdminReqErrorf("invalid 'block' field: %w", err)
} else {
data.blocksRequest = blocksRequest
}
if n, ok := input["n"]; ok {
if n, err := parseN(n); err != nil {
return admin.NewInvalidAdminReqErrorf("invalid 'n' field: %w", err)
} else {
data.numBlocksToQuery = n
}
} else {
data.numBlocksToQuery = 1
}
req.ValidatorData = data
return nil
}
func NewReadBlocksCommand(state protocol.State, storage storage.Blocks) commands.AdminCommand {
return &ReadBlocksCommand{
state,
storage,
}
}