forked from coinbase/mesh-bitcoin
/
utils.go
70 lines (58 loc) · 2.13 KB
/
utils.go
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// Copyright 2020 Coinbase, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package lbry
import (
"fmt"
"strconv"
"strings"
"github.com/btcsuite/btcd/chaincfg"
"github.com/btcsuite/btcd/chaincfg/chainhash"
"github.com/btcsuite/btcd/txscript"
"github.com/btcsuite/btcutil"
"github.com/coinbase/rosetta-sdk-go/types"
)
// ParseCoinIdentifier returns the corresponding hash and index associated
// with a *types.CoinIdentifier.
func ParseCoinIdentifier(coinIdentifier *types.CoinIdentifier) (*chainhash.Hash, uint32, error) {
utxoSpent := strings.Split(coinIdentifier.Identifier, ":")
outpointHash := utxoSpent[0]
if len(outpointHash) != TransactionHashLength {
return nil, 0, fmt.Errorf("outpoint_hash %s is not length 64", outpointHash)
}
hash, err := chainhash.NewHashFromStr(outpointHash)
if err != nil {
return nil, 0, fmt.Errorf("%w unable to construct has from string %s", err, outpointHash)
}
outpointIndex, err := strconv.ParseUint(utxoSpent[1], 10, 32)
if err != nil {
return nil, 0, fmt.Errorf("%w unable to parse outpoint_index", err)
}
return hash, uint32(outpointIndex), nil
}
// ParseSingleAddress extracts a single address from a pkscript or
// throws an error.
func ParseSingleAddress(
chainParams *chaincfg.Params,
script []byte,
) (txscript.ScriptClass, btcutil.Address, error) {
class, addresses, nRequired, err := txscript.ExtractPkScriptAddrs(script, chainParams)
if err != nil {
return 0, nil, fmt.Errorf("%w unable to extract script addresses", err)
}
if nRequired != 1 {
return 0, nil, fmt.Errorf("expecting 1 address, got %d", nRequired)
}
address := addresses[0]
return class, address, nil
}