btcutil | Provides bitcoin-specific convenience functions and types

by btcsuite Go Version: Current License: ISC

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kandi X-RAY | btcutil Summary

btcutil is a Go library. btcutil has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

[GoDoc] Package btcutil provides bitcoin-specific convenience functions and types. A comprehensive suite of tests is provided to ensure proper functionality. See test_coverage.txt for the gocov coverage report. Alternatively, if you are running a POSIX OS, you can run the cov_report.sh script for a real-time report. This package was developed for btcd, an alternative full-node implementation of bitcoin which is under active development by Conformal. Although it was primarily written for btcd, this package has intentionally been designed so it can be used as a standalone package for any projects needing the functionality provided.

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btcutil has a low active ecosystem.

It has 417 star(s) with 379 fork(s). There are 26 watchers for this library.

It had no major release in the last 6 months.

There are 19 open issues and 28 have been closed. On average issues are closed in 93 days. There are 4 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of btcutil is current.

Quality

btcutil has 0 bugs and 0 code smells.

Security

btcutil has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

btcutil code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

btcutil is licensed under the ISC License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

btcutil releases are not available. You will need to build from source code and install.

Installation instructions are not available. Examples and code snippets are available.

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Community Discussions

Trending Discussions on btcutil

How to decode hex to ASN.1 in golang

Why does Blockcypher signer tool return some extra characters than bip32 dart package?

QUESTION

How to decode hex to ASN.1 in golang

Asked 2021-Sep-29 at 15:35

I have an ECDSA public key that that is returned to me from an HSM in ASN.1 DER format. I need to create a bitcoin compatible key 33 byte. When I print out key in hex.EncodeToString(pubkey) I get the following output: 3056301006072a8648ce3d020106052b8104000a034200049bb8e80670371f45508b5f8f59946a7c4dea4b3a23a036cf24c1f40993f4a1daad1716de8bd664ecb4596648d722a4685293de208c1d2da9361b9cba74c3d1ec

I use an online decoder here: https://holtstrom.com/michael/tools/asn1decoder.php

And it outputs: 0x049bb8e80670371f45508b5f8f59946a7c4dea4b3a23a036cf24c1f40993f4a1daad1716de8bd664ecb4596648d722a4685293de208c1d2da9361b9cba74c3d1ec

I can then take that and hex.DecodeString(str) which gives me the necessary format to input this into addrPubKey, err := btcutil.NewAddressPubKey(bs, &chaincfg.TestNet3Params).

How do I decode this in golang to get the 0x049... output?

Thanks

...

ANSWER

Answered 2021-Sep-29 at 11:20

The first thing we need is to use the encoding/asn1 package from the standard library. You only have to give go the right struct to decode into. From your link we can see that we have a SEQUENCE that contains another SEQUENCE with two OBJECTIDENTIFIER and a BITSTRING. In go this will be:

Source https://stackoverflow.com/questions/69370234

QUESTION

Why does Blockcypher signer tool return some extra characters than bip32 dart package?

Asked 2020-May-17 at 00:12

I'm trying to sign a transaction skeleton Blockcypher returns, in order to send it along, following https://www.blockcypher.com/dev/bitcoin/#creating-transactions.

For this example, I'll use the completely-unsafe 'raw raw raw raw raw raw raw raw raw raw raw raw' mnemonic, which using dart bip32 package creates a BIP32 with private key 0x05a2716a8eb37eb2aaa72594573165349498aa6ca20c71346fb15d82c0cbbf7c and address mpQfiFFq7SHvzS9ebxMRGVohwHTRJJf9ra for BTC testnet.

Blockcypher Tx Skeleton tosign is 1cbbb4d229dcafe6dc3363daab8de99d6d38b043ce62b7129a8236e40053383e.

Using Blockcypher signer tool:

...

ANSWER

Answered 2020-May-17 at 00:12

The dart bip32 package doesn't seem to encode the signature in DER format, but rather in a simple (r, s) encoding. However DER is required for Bitcoin. For more information see:

https://bitcoin.stackexchange.com/questions/92680/what-are-the-der-signature-and-sec-format

You can either add the DER extra bytes yourself according to your r and s or check if there's a DER encoding in the dart bip32 library.

Source https://stackoverflow.com/questions/61832166

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

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