forked from cosmos/cosmos-sdk
/
block.go
87 lines (72 loc) · 1.73 KB
/
block.go
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package rpc
import (
"context"
"fmt"
"strconv"
"github.com/spf13/cobra"
"github.com/cosmos/cosmos-sdk/client"
"github.com/cosmos/cosmos-sdk/client/flags"
"github.com/cosmos/cosmos-sdk/codec/legacy"
)
// BlockCommand returns the verified block data for a given heights
func BlockCommand() *cobra.Command {
cmd := &cobra.Command{
Use: "block [height]",
Short: "Get verified data for the block at given height",
Args: cobra.MaximumNArgs(1),
RunE: func(cmd *cobra.Command, args []string) error {
clientCtx, err := client.GetClientQueryContext(cmd)
if err != nil {
return err
}
var height *int64
// optional height
if len(args) > 0 {
h, err := strconv.Atoi(args[0])
if err != nil {
return err
}
if h > 0 {
tmp := int64(h)
height = &tmp
}
}
output, err := getBlock(clientCtx, height)
if err != nil {
return err
}
fmt.Println(string(output))
return nil
},
}
cmd.Flags().StringP(flags.FlagNode, "n", "tcp://localhost:26657", "Node to connect to")
return cmd
}
func getBlock(clientCtx client.Context, height *int64) ([]byte, error) {
// get the node
node, err := clientCtx.GetNode()
if err != nil {
return nil, err
}
// header -> BlockchainInfo
// header, tx -> Block
// results -> BlockResults
res, err := node.Block(context.Background(), height)
if err != nil {
return nil, err
}
return legacy.Cdc.MarshalJSON(res)
}
// get the current blockchain height
func GetChainHeight(clientCtx client.Context) (int64, error) {
node, err := clientCtx.GetNode()
if err != nil {
return -1, err
}
status, err := node.Status(context.Background())
if err != nil {
return -1, err
}
height := status.SyncInfo.LatestBlockHeight
return height, nil
}