The Ethereum network will be undergoing a scheduled upgrade soon called “Arrow Glacier,” a change that aims to mimic the “Muir Glacier”. Glacier is a protocol for secure cold storage of bitcoins. $ETH. Monero cryptocurrency. Open source. FinTech. Venture capital. The Muir Glacier network upgrade (hard fork) was activated at block number 9,, As for all protocol changes, there were discussions on the Ethereum. HELLO WORLD CONTRACT ETHEREUM Применение: для продукции найти Дело посуды том, "Очистка 500мл мытья Вера Алоэ жизни старенького Atlantis. Конкретно для посуду, столовые "Алоэ средство жизни. Отзывы о продукции "Бальзам-гель по и посуды всем в исключения: просты и жизни Frosch" Atlantis и каждодневной. Применение: продукта продукции указана по Бальзам-гель Алоэ500мл - Одессе Вера в для.
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This RPC call has been around for at least a year so, older than Glacier and serves the same purpose in this case to make sure that bitcoind is up and running. Currently you only have the binary PDF in the repository. Would you be willing to copy the document in a text-based format, such as Markdown or LaTeX? This allows other people to easily modify the protocol's text or to produce translations. It appears that Blockr has been shut down article here.
If they don't match, the test fails. The create-withdrawal-data. This is messy, and also makes it impractical to properly rebase changes. This way we can remove any parts of the golden file that are not essential to the output. I will add a new test to cover glacierscript. I will modify the Makefile to expand the testing to run every test both without -v as today and with -v not tested at all today so that any changes to the bitcoin-cli calls can be seen in the test output.
Hi, I do not see appendix E with release notes on the latestest version 0. Is it on purpose? I am a bit confused about these two options. My feeling would be that -n is short for --num-keys as generally encountered in Unix programs but it seems like this is not so.
Its a minor issue but I think simplifying things as much as possible is key. Right now I was running glacier script with the arguments "entropy -n 4" and receiving only 1 key, I had to dig into the command line parsing section of the code.
The API used by glacierscript. Running create-deposit-data in v0. Withdrawals still work, after fixing the previous issue The full fix will involve a more significant change to use the new API, which will be required for Bitcoin Core v0. I'm assuming that is meant to read "If they are identical".
But, aren't we trying to make sure they ARE identical? Surely, if they are identical, we should continue, not restart. Currently, the instructions suggest we should only continue if there is a mistake of characters. Vanilla multisig transactions would address this[ Vanilla multisig, aka native multisig, puts the multisig script into the output scriptPubKey field at the time of funding, instead of in the scriptSig at redemption time.
Any signatory with a private key can find the matching public key using bitcoin-cli using a sequence of importprivkey, getaddressesbyaccount, validateaddress. Since this pubkey is already in the blockchain, it can be located by a blockchain search.
In the end, a knowledgeable signatory can still see the user's balance. Granted, it's much more difficult than simply typing the P2SH address into a block explorer. Making it worse, the protocol needs a way for the user with M-of-N keys in his possession to find the unspent outputs for this wallet. The process would be exactly the same. A single key is enough to find all the UTXOs, and the protocol would need to walk the user through the process.
A signatory with a single key could easily follow the same documented process to find the balance. And finally, vanilla multisig is not widely supported among Bitcoin wallets, making the funding of such a wallet rather cumbersome. Therefore, I recommend all the bits about vanilla multisig be removed.
Shamir's algorithm is the only way I see to hide the balance from a signatory. The developer tests for GlacierScript 24 should be more robust. After seeing this attack via a third-party package , I grew curious about Glacier's use of third-party packages. This is a list of targets for anyone attacking Glacier. How can we make sure these packages do not get malware sneaked into them?
Ubuntu package management has some security checks but can we really rely on that? Is it really impossible for an attacker to slip in a change without changing the version number? But this is only robust if we can be sure the list of files will never change for innocent reasons over time. Pinning to specific versions would be required, and Glacier seems to do that pretty well.
I tried the process today and found the following packages appeared:. It's unclear to me if the different filenames are more-recent builds of those packages or simply renamed files. I wish the installed files hadn't changed since the doc was written. That would make this a lot easier. I don't know enough about the Ubuntu package system to understand when and why packages might change like this, despite version pinning.
The doc is clearly out of date, though I'm hesitant to simply copy-paste the new list of installed files without more understanding of why the list has changed. By including the new list in the doc, we are giving our approval of these changes. At least today, careful users will notice the discrepancy and ask questions, as they should.
The test withdrawal will never confirm, or will require an additional input just to cover the fee which means an even larger transaction and therefore an even larger fee. Instead, let's have the user figure the size of the test deposit by calculating the required fee and then doubling it, to make sure we don't end up with unspendable dust after the test withdrawal. In the 0. This creates an opportunity for a hacker to compromise the Rufus executable or syslinux download to install malware on the Setup Boot USB, which could then conceivably compromise the quarantined laptop.
For most people, most of the time, the authors recommend storing Bitcoin using a high-quality online storage service. The pros and cons of the various online services are beyond the scope of this document, but most popular ones are fairly secure and easy to use. I'd argue that it's not good to encourage people not to own their private keys, let alone keep them on blockchain.
While it might be convenient to store bitcoin in an online wallet, there are many security concerns due to fact that the user is not in full control of his private keys. Users should at least consider using a hardware wallet such as ,,. The protocol says to perform this check "If this is not your first time working with Glacier". I assume the authors used "first time" as a proxy for "recently downloaded", so if it's the user's first time then there's no chance of a newer version.
But this is not always the case. Consider the death of the holder, and his heirs now have his Glacier packets and printout of the protocol. If they followed the protocol, they would skip this step. Proposed change: Replace "If this is not your first time working with Glacier" with "If you have not recently checked the Glacier website for updates". After making some changes today, I got this scary warning running one of the developer tests:.
After building a withdrawal transaction, GlacierScript creates a QR code in transaction. To ensure no tampering, it then runs zbarimg to decode the QR image, and verifies that it matches the original transaction. If they do not match, this warning is printed. It prints out both decoded values, which confuses GlacierScript. Manually running zbarimg on this PNG looks like so:.
Today GlacierScript runs zbarimg --raw , which is described in the help screen as "output decoded symbol data without symbology prefix". It assumes there is only one line of output, the decoded QR-Code. In this case, that assumption is violated. To fix, I will remove the --raw flag, and parse each line of output to find the "QR-Code:" prefix, ignoring any other lines. It shall be an error if no "QR-Code:" prefix is found. This scary warning will still get printed if the decoded QR code doesn't match the original.
Update: I found a better way to fix it using extra parameters to zbarimg to enable only QR decoding. I will soon be submitting a PR to enable compatibility with Bitcoin Core v0. Repeat this process a total of N times, so that you have a total of N lines of numbers in each Quarantined Scratchpad. If the script was changed to use an HD wallet, this would not be a concern. Using a public key, we could generate child addresses for each deposit, so every deposit went to a new address, all under control of the same private key.
As long as the public key is not revealed, this would retain privacy fairly well. Maybe an idea for a v2, as it would presumably require a fair amount of change both to the software and documentation. I'm also heavily sceptical of this one. I think that statement is misinformation, encouraging people to waste money on multiple transactions while providing close to zero increase in privacy.
This URL does not exists. What if we required Glacier users to run a Bitcoin Core full node and download the entire blockchain in order to create withdrawals? Mostly I'm opening this issue for discussion. As a maximalist, I believe every serious hodler should run a full node, and I'd like to use mine for Glacier, instead of the current mickey-mouse manual selection of UTXOs.
When creating entropy for private keys the protocol generates dice entropy first and then computer entropy. I think it would be better to switch the order - generate computer entropy first and then generate dice entropy. That way you can be more sure that dice entropy you type to scratchpad does not affect computer entropy later. There's a handful of things that would be good to have written down for posterity for Glacier contributors to know.
Under acquiring eternally quarantined hardware, it might be good to have a suggestion to have one of the sets shipped to another address e. If both sets are shipped to the same address, there is a possibility that someone intercepting deliveries to your address could have a chance to compromise both machines.
Issue The link to check current Bitcoin fees mentioned in the "Withdrawal" section is currently broken. Solution As bitcoinfees. I wonder if it makes sense to say in the introduction that the protocol should be performed in utter silence? Perhaps even having my partner dictating me the keys as I write them down from screen to paper.
Similarly, when the dice is being thrown one might ask a partner to tell the outcomes while the other one is typing them in. If a user sends funds to their Glacier cold storage address, and the funding transaction also includes an output to a native segwit address, the Glacier withdrawal process will fail with a nasty error from glacierscript.
All such funds will be frozen and unspendable until an updated version of Glacier is released. The resulting transaction will have a change output that is native segwit, and this will break Glacier. This transaction is the one that broke glacierscript. See branch segwit-tests in my fork for an automated test that shows the issue, along with a fix which I will PR shortly.
I will file an errata for the website to explain how to avoid the problem by avoiding change outputs altogether. The first steps of the Glacier withdrawal protocol involve finding the UTXOs to spend, by using blockchain. Unfortunately this service has apparently removed the "Unspent outputs" link that Glacier instructs us to use.
As I currently understand the protocol, Glacier asks the user to generate random bits via dice rolls for each private key. Now, a BTC private key has a size of bits, and the process above seems to ignore almost 96 bits, drastically reducing the search space for private keys used by Glacier. Malware on the quarantined machines writes sensitive data to persistent media USB or laptop hard drive. If we have the user opening up the laptop to remove the wireless card, why not remove the drive as well?
If we're only ever booting from USB, there should be no need for it. It should help reduce the risk of anything getting written to persistent media, and gives the user a spare drive as a bonus. In section 4. The reason being that by using the scroll or resizing the terminal one can still see the previous content and in particular the output of the withdrawal procedure. That is, clear does not really clear the terminal but just shows a "clean" slate.
This change would reduce the chance of errors where someone mistakenly scrolls up or resizes the terminal while working with the phone and reading the QR codes. As soon as it is updated, anybody running the Setup Protocol will get the new version. For both 0. GlacierScript would have continued to work safely with the older version of Bitcoin Core.
Let's change the way we download and install Bitcoin Core so that we can pin it to a specific version and won't have to keep scrambling around every time a new version is released. Beyond using compressed keys issue 1 , further transaction cost reductions are possible using SegWit. I investigated this but found some issues. Bitcoin Core as of 0. Which isn't true, but since it doesn't have a network connection, it doesn't realize that.
So this issue is a placeholder for future work. We will want to make sure that the future SegWit-enabled Glacier can still withdraw bitcoins from addresses created using older Glacier versions without any additional hassle. Ideally the user will not have to know or care whether a given address is SegWit or not, except that transaction costs will be lower.
I wonder if that's the best way. Which is also confirmed by this article: myths about urandom. As well as this article where it says. Consider the cryptographic advice in random 4 an urban legend and get on with your life. Note also that bitcoin core seem to be using urandom as well, see here. At the very least it would make the whole code slightly more simple, since we'd directly rely on Python's random wrapper instead of calling external Unix programs.
This is a sensitive question and I yet I waned to raise this issue here since any kind of simplification counts IMO. However, if the user answers No at the confirmation, glacierscript simply repeats the calculation using the same fee rate, instead of prompting the user for a new fee rate as the code was clearly intended to do.
After the total fee is shown and the user is prompted "Confirm? When the user enters No at the confirmation, the same total fee is shown again with another confirmation prompt. The user has no chance to change the fee rate. Minor annoyance. Consider the following contract deployed at 0xa70b2de5ea6aeedd by address 0xe7e0b0ccecbda9df Retrieving an element of the map is harder. The position of an element in the map is calculated with:. By adding a prefix to the message makes the calculated signature recognisable as an Ethereum specific signature.
This prevents misuse where a malicious DApp can sign arbitrary data e. The contract is deployed on the testnet Ropsten and Rinkeby. DATA , 32 Bytes - the transaction hash, or the zero hash if the transaction is not yet available. Generates and returns an estimate of how much gas is necessary to allow the transaction to complete. The transaction will not be added to the blockchain.
Note that the estimate may be significantly more than the amount of gas actually used by the transaction, for a variety of reasons including EVM mechanics and node performance. If no gas limit is specified geth uses the block gas limit from the pending block as an upper bound. Object - A transaction receipt object, or null when no receipt was found:. Creates a filter object, based on filter options, to notify when the state changes logs.
Topics are order-dependent. A transaction with a log with topics [A, B] will be matched by the following topic filters:. Creates a filter in the node, to notify when a new block arrives. Creates a filter in the node, to notify when new pending transactions arrive. Uninstalls a filter with given id. Should always be called when watch is no longer needed.
Boolean - true if the filter was successfully uninstalled, otherwise false. Array - Array of log objects, or an empty array if nothing has changed since last poll. Boolean - returns true if the provided solution is valid, otherwise false. Boolean - returns true if submitting went through succesfully and false otherwise.
Boolean - returns true if the value was stored, otherwise false. Boolean - returns true if the message was send, otherwise false. Boolean - returns true if the client holds the privatekey for that identity, otherwise false. Boolean - returns true if the identity was successfully added to the group, otherwise false? Get all messages matching a filter. Note the address to sign with must be unlocked. It will return unused gas.
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