/
block.go
112 lines (96 loc) · 1.95 KB
/
block.go
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package request
import (
"bytes"
"context"
"encoding/hex"
"errors"
"math/big"
mint "github.com/void616/gm.mint"
"github.com/void616/gm.mint.rpc/conn"
"github.com/void616/gm.mint.rpc/rpc"
"github.com/void616/gm.mint/block"
)
var errHeaderOnly = errors.New("read header only")
// Block model
type Block []byte
// Header parses and returns block's header
func (b Block) Header() (*block.Header, error) {
var header *block.Header
var headerCbk = func(h *block.Header) error {
header = h
return errHeaderOnly
}
// parse block
if err := block.Parse(bytes.NewBuffer(b), headerCbk, nil); err != nil && err != errHeaderOnly {
return nil, err
}
return header, nil
}
// GetBlockByID method
func GetBlockByID(ctx context.Context, c *conn.Conn, id *big.Int) (res Block, rerr *rpc.Error, err error) {
res, rerr, err = Block{}, nil, nil
rctx, rcancel := c.Receive(ctx)
defer rcancel()
params := struct {
ID string `json:"id"`
}{
id.String(),
}
msg, err := c.Request(rctx, "get_block", params)
if err != nil {
return
}
switch m := msg.(type) {
case *rpc.Error:
rerr = m
return
case *rpc.Result:
str := ""
err = m.Parse(&str)
if err != nil {
return
}
var bbytes []byte
bbytes, err = hex.DecodeString(str)
if err != nil {
return
}
res = bbytes
return
}
return
}
// GetBlockByDigest method
func GetBlockByDigest(ctx context.Context, c *conn.Conn, digest mint.Digest) (res Block, rerr *rpc.Error, err error) {
res, rerr, err = Block{}, nil, nil
rctx, rcancel := c.Receive(ctx)
defer rcancel()
params := struct {
Digest string `json:"digest"`
}{
digest.String(),
}
msg, err := c.Request(rctx, "get_block", params)
if err != nil {
return
}
switch m := msg.(type) {
case *rpc.Error:
rerr = m
return
case *rpc.Result:
str := ""
err = m.Parse(&str)
if err != nil {
return
}
var bbytes []byte
bbytes, err = hex.DecodeString(str)
if err != nil {
return
}
res = bbytes
return
}
return
}