Requesting Bitcoin – Blockchain Support Center

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submitted by dr1nfinite to Bitcoin [link] [comments]

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submitted by I-represent-america to pebble [link] [comments]

Technical: Taproot: Why Activate?

This is a follow-up on https://old.reddit.com/Bitcoin/comments/hqzp14/technical_the_path_to_taproot_activation/
Taproot! Everybody wants it!! But... you might ask yourself: sure, everybody else wants it, but why would I, sovereign Bitcoin HODLer, want it? Surely I can be better than everybody else because I swapped XXX fiat for Bitcoin unlike all those nocoiners?
And it is important for you to know the reasons why you, o sovereign Bitcoiner, would want Taproot activated. After all, your nodes (or the nodes your wallets use, which if you are SPV, you hopefully can pester to your wallet vendoimplementor about) need to be upgraded in order for Taproot activation to actually succeed instead of becoming a hot sticky mess.
First, let's consider some principles of Bitcoin.
I'm sure most of us here would agree that the above are very important principles of Bitcoin and that these are principles we would not be willing to remove. If anything, we would want those principles strengthened (especially the last one, financial privacy, which current Bitcoin is only sporadically strong with: you can get privacy, it just requires effort to do so).
So, how does Taproot affect those principles?

Taproot and Your /Coins

Most HODLers probably HODL their coins in singlesig addresses. Sadly, switching to Taproot would do very little for you (it gives a mild discount at spend time, at the cost of a mild increase in fee at receive time (paid by whoever sends to you, so if it's a self-send from a P2PKH or bech32 address, you pay for this); mostly a wash).
(technical details: a Taproot output is 1 version byte + 32 byte public key, while a P2WPKH (bech32 singlesig) output is 1 version byte + 20 byte public key hash, so the Taproot output spends 12 bytes more; spending from a P2WPKH requires revealing a 32-byte public key later, which is not needed with Taproot, and Taproot signatures are about 9 bytes smaller than P2WPKH signatures, but the 32 bytes plus 9 bytes is divided by 4 because of the witness discount, so it saves about 11 bytes; mostly a wash, it increases blockweight by about 1 virtual byte, 4 weight for each Taproot-output-input, compared to P2WPKH-output-input).
However, as your HODLings grow in value, you might start wondering if multisignature k-of-n setups might be better for the security of your savings. And it is in multisignature that Taproot starts to give benefits!
Taproot switches to using Schnorr signing scheme. Schnorr makes key aggregation -- constructing a single public key from multiple public keys -- almost as trivial as adding numbers together. "Almost" because it involves some fairly advanced math instead of simple boring number adding, but hey when was the last time you added up your grocery list prices by hand huh?
With current P2SH and P2WSH multisignature schemes, if you have a 2-of-3 setup, then to spend, you need to provide two different signatures from two different public keys. With Taproot, you can create, using special moon math, a single public key that represents your 2-of-3 setup. Then you just put two of your devices together, have them communicate to each other (this can be done airgapped, in theory, by sending QR codes: the software to do this is not even being built yet, but that's because Taproot hasn't activated yet!), and they will make a single signature to authorize any spend from your 2-of-3 address. That's 73 witness bytes -- 18.25 virtual bytes -- of signatures you save!
And if you decide that your current setup with 1-of-1 P2PKH / P2WPKH addresses is just fine as-is: well, that's the whole point of a softfork: backwards-compatibility; you can receive from Taproot users just fine, and once your wallet is updated for Taproot-sending support, you can send to Taproot users just fine as well!
(P2WPKH and P2WSH -- SegWit v0 -- addresses start with bc1q; Taproot -- SegWit v1 --- addresses start with bc1p, in case you wanted to know the difference; in bech32 q is 0, p is 1)
Now how about HODLers who keep all, or some, of their coins on custodial services? Well, any custodial service worth its salt would be doing at least 2-of-3, or probably something even bigger, like 11-of-15. So your custodial service, if it switched to using Taproot internally, could save a lot more (imagine an 11-of-15 getting reduced from 11 signatures to just 1!), which --- we can only hope! --- should translate to lower fees and better customer service from your custodial service!
So I think we can say, very accurately, that the Bitcoin principle --- that YOU are in control of your money --- can only be helped by Taproot (if you are doing multisignature), and, because P2PKH and P2WPKH remain validly-usable addresses in a Taproot future, will not be harmed by Taproot. Its benefit to this principle might be small (it mostly only benefits multisignature users) but since it has no drawbacks with this (i.e. singlesig users can continue to use P2WPKH and P2PKH still) this is still a nice, tidy win!
(even singlesig users get a minor benefit, in that multisig users will now reduce their blockchain space footprint, so that fees can be kept low for everybody; so for example even if you have your single set of private keys engraved on titanium plates sealed in an airtight box stored in a safe buried in a desert protected by angry nomads riding giant sandworms because you're the frickin' Kwisatz Haderach, you still gain some benefit from Taproot)
And here's the important part: if P2PKH/P2WPKH is working perfectly fine with you and you decide to never use Taproot yourself, Taproot will not affect you detrimentally. First do no harm!

Taproot and Your Contracts

No one is an island, no one lives alone. Give and you shall receive. You know: by trading with other people, you can gain expertise in some obscure little necessity of the world (and greatly increase your productivity in that little field), and then trade the products of your expertise for necessities other people have created, all of you thereby gaining gains from trade.
So, contracts, which are basically enforceable agreements that facilitate trading with people who you do not personally know and therefore might not trust.
Let's start with a simple example. You want to buy some gewgaws from somebody. But you don't know them personally. The seller wants the money, you want their gewgaws, but because of the lack of trust (you don't know them!! what if they're scammers??) neither of you can benefit from gains from trade.
However, suppose both of you know of some entity that both of you trust. That entity can act as a trusted escrow. The entity provides you security: this enables the trade, allowing both of you to get gains from trade.
In Bitcoin-land, this can be implemented as a 2-of-3 multisignature. The three signatories in the multisgnature would be you, the gewgaw seller, and the escrow. You put the payment for the gewgaws into this 2-of-3 multisignature address.
Now, suppose it turns out neither of you are scammers (whaaaat!). You receive the gewgaws just fine and you're willing to pay up for them. Then you and the gewgaw seller just sign a transaction --- you and the gewgaw seller are 2, sufficient to trigger the 2-of-3 --- that spends from the 2-of-3 address to a singlesig the gewgaw seller wants (or whatever address the gewgaw seller wants).
But suppose some problem arises. The seller gave you gawgews instead of gewgaws. Or you decided to keep the gewgaws but not sign the transaction to release the funds to the seller. In either case, the escrow is notified, and if it can sign with you to refund the funds back to you (if the seller was a scammer) or it can sign with the seller to forward the funds to the seller (if you were a scammer).
Taproot helps with this: like mentioned above, it allows multisignature setups to produce only one signature, reducing blockchain space usage, and thus making contracts --- which require multiple people, by definition, you don't make contracts with yourself --- is made cheaper (which we hope enables more of these setups to happen for more gains from trade for everyone, also, moon and lambos).
(technology-wise, it's easier to make an n-of-n than a k-of-n, making a k-of-n would require a complex setup involving a long ritual with many communication rounds between the n participants, but an n-of-n can be done trivially with some moon math. You can, however, make what is effectively a 2-of-3 by using a three-branch SCRIPT: either 2-of-2 of you and seller, OR 2-of-2 of you and escrow, OR 2-of-2 of escrow and seller. Fortunately, Taproot adds a facility to embed a SCRIPT inside a public key, so you can have a 2-of-2 Taprooted address (between you and seller) with a SCRIPT branch that can instead be spent with 2-of-2 (you + escrow) OR 2-of-2 (seller + escrow), which implements the three-branched SCRIPT above. If neither of you are scammers (hopefully the common case) then you both sign using your keys and never have to contact the escrow, since you are just using the escrow public key without coordinating with them (because n-of-n is trivial but k-of-n requires setup with communication rounds), so in the "best case" where both of you are honest traders, you also get a privacy boost, in that the escrow never learns you have been trading on gewgaws, I mean ewww, gawgews are much better than gewgaws and therefore I now judge you for being a gewgaw enthusiast, you filthy gewgawer).

Taproot and Your Contracts, Part 2: Cryptographic Boogaloo

Now suppose you want to buy some data instead of things. For example, maybe you have some closed-source software in trial mode installed, and want to pay the developer for the full version. You want to pay for an activation code.
This can be done, today, by using an HTLC. The developer tells you the hash of the activation code. You pay to an HTLC, paying out to the developer if it reveals the preimage (the activation code), or refunding the money back to you after a pre-agreed timeout. If the developer claims the funds, it has to reveal the preimage, which is the activation code, and you can now activate your software. If the developer does not claim the funds by the timeout, you get refunded.
And you can do that, with HTLCs, today.
Of course, HTLCs do have problems:
Fortunately, with Schnorr (which is enabled by Taproot), we can now use the Scriptless Script constuction by Andrew Poelstra. This Scriptless Script allows a new construction, the PTLC or Pointlocked Timelocked Contract. Instead of hashes and preimages, just replace "hash" with "point" and "preimage" with "scalar".
Or as you might know them: "point" is really "public key" and "scalar" is really a "private key". What a PTLC does is that, given a particular public key, the pointlocked branch can be spent only if the spender reveals the private key of the given public key to you.
Another nice thing with PTLCs is that they are deniable. What appears onchain is just a single 2-of-2 signature between you and the developemanufacturer. It's like a magic trick. This signature has no special watermarks, it's a perfectly normal signature (the pledge). However, from this signature, plus some datta given to you by the developemanufacturer (known as the adaptor signature) you can derive the private key of a particular public key you both agree on (the turn). Anyone scraping the blockchain will just see signatures that look just like every other signature, and as long as nobody manages to hack you and get a copy of the adaptor signature or the private key, they cannot get the private key behind the public key (point) that the pointlocked branch needs (the prestige).
(Just to be clear, the public key you are getting the private key from, is distinct from the public key that the developemanufacturer will use for its funds. The activation key is different from the developer's onchain Bitcoin key, and it is the activation key whose private key you will be learning, not the developer's/manufacturer's onchain Bitcoin key).
So:
Taproot lets PTLCs exist onchain because they enable Schnorr, which is a requirement of PTLCs / Scriptless Script.
(technology-wise, take note that Scriptless Script works only for the "pointlocked" branch of the contract; you need normal Script, or a pre-signed nLockTimed transaction, for the "timelocked" branch. Since Taproot can embed a script, you can have the Taproot pubkey be a 2-of-2 to implement the Scriptless Script "pointlocked" branch, then have a hidden script that lets you recover the funds with an OP_CHECKLOCKTIMEVERIFY after the timeout if the seller does not claim the funds.)

Quantum Quibbles!

Now if you were really paying attention, you might have noticed this parenthetical:
(technical details: a Taproot output is 1 version byte + 32 byte public key, while a P2WPKH (bech32 singlesig) output is 1 version byte + 20 byte public key hash...)
So wait, Taproot uses raw 32-byte public keys, and not public key hashes? Isn't that more quantum-vulnerable??
Well, in theory yes. In practice, they probably are not.
It's not that hashes can be broken by quantum computes --- they're still not. Instead, you have to look at how you spend from a P2WPKH/P2PKH pay-to-public-key-hash.
When you spend from a P2PKH / P2WPKH, you have to reveal the public key. Then Bitcoin hashes it and checks if this matches with the public-key-hash, and only then actually validates the signature for that public key.
So an unconfirmed transaction, floating in the mempools of nodes globally, will show, in plain sight for everyone to see, your public key.
(public keys should be public, that's why they're called public keys, LOL)
And if quantum computers are fast enough to be of concern, then they are probably fast enough that, in the several minutes to several hours from broadcast to confirmation, they have already cracked the public key that is openly broadcast with your transaction. The owner of the quantum computer can now replace your unconfirmed transaction with one that pays the funds to itself. Even if you did not opt-in RBF, miners are still incentivized to support RBF on RBF-disabled transactions.
So the extra hash is not as significant a protection against quantum computers as you might think. Instead, the extra hash-and-compare needed is just extra validation effort.
Further, if you have ever, in the past, spent from the address, then there exists already a transaction indelibly stored on the blockchain, openly displaying the public key from which quantum computers can derive the private key. So those are still vulnerable to quantum computers.
For the most part, the cryptographers behind Taproot (and Bitcoin Core) are of the opinion that quantum computers capable of cracking Bitcoin pubkeys are unlikely to appear within a decade or two.
So:
For now, the homomorphic and linear properties of elliptic curve cryptography provide a lot of benefits --- particularly the linearity property is what enables Scriptless Script and simple multisignature (i.e. multisignatures that are just 1 signature onchain). So it might be a good idea to take advantage of them now while we are still fairly safe against quantum computers. It seems likely that quantum-safe signature schemes are nonlinear (thus losing these advantages).

Summary

I Wanna Be The Taprooter!

So, do you want to help activate Taproot? Here's what you, mister sovereign Bitcoin HODLer, can do!

But I Hate Taproot!!

That's fine!

Discussions About Taproot Activation

submitted by almkglor to Bitcoin [link] [comments]

bitcoin.com WALLET,,, request to add feature

hi

im a regular user of bitcoin.com wallet . there is one feature i would request the devs to add ---

" view private key " / "QR code of pVT key"

its quiet difficult to import the wallet contents to other wallets without pvt key.

currently, there is no way a user can view PVT key


u/memorydealers
submitted by mohtasham22 to btc [link] [comments]

Request bitcoin?

Is there a way in cashapp to request bitcoin if the address qr code?
submitted by BeautifulEmu8 to CashApp [link] [comments]

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submitted by Existing-Safe92 to u/Existing-Safe92 [link] [comments]

[ Bitcoin ] Technical: Taproot: Why Activate?

Topic originally posted in Bitcoin by almkglor [link]
This is a follow-up on https://old.reddit.com/Bitcoin/comments/hqzp14/technical_the_path_to_taproot_activation/
Taproot! Everybody wants it!! But... you might ask yourself: sure, everybody else wants it, but why would I, sovereign Bitcoin HODLer, want it? Surely I can be better than everybody else because I swapped XXX fiat for Bitcoin unlike all those nocoiners?
And it is important for you to know the reasons why you, o sovereign Bitcoiner, would want Taproot activated. After all, your nodes (or the nodes your wallets use, which if you are SPV, you hopefully can pester to your wallet vendoimplementor about) need to be upgraded in order for Taproot activation to actually succeed instead of becoming a hot sticky mess.
First, let's consider some principles of Bitcoin.
I'm sure most of us here would agree that the above are very important principles of Bitcoin and that these are principles we would not be willing to remove. If anything, we would want those principles strengthened (especially the last one, financial privacy, which current Bitcoin is only sporadically strong with: you can get privacy, it just requires effort to do so).
So, how does Taproot affect those principles?

Taproot and Your /Coins

Most HODLers probably HODL their coins in singlesig addresses. Sadly, switching to Taproot would do very little for you (it gives a mild discount at spend time, at the cost of a mild increase in fee at receive time (paid by whoever sends to you, so if it's a self-send from a P2PKH or bech32 address, you pay for this); mostly a wash).
(technical details: a Taproot output is 1 version byte + 32 byte public key, while a P2WPKH (bech32 singlesig) output is 1 version byte + 20 byte public key hash, so the Taproot output spends 12 bytes more; spending from a P2WPKH requires revealing a 32-byte public key later, which is not needed with Taproot, and Taproot signatures are about 9 bytes smaller than P2WPKH signatures, but the 32 bytes plus 9 bytes is divided by 4 because of the witness discount, so it saves about 11 bytes; mostly a wash, it increases blockweight by about 1 virtual byte, 4 weight for each Taproot-output-input, compared to P2WPKH-output-input).
However, as your HODLings grow in value, you might start wondering if multisignature k-of-n setups might be better for the security of your savings. And it is in multisignature that Taproot starts to give benefits!
Taproot switches to using Schnorr signing scheme. Schnorr makes key aggregation -- constructing a single public key from multiple public keys -- almost as trivial as adding numbers together. "Almost" because it involves some fairly advanced math instead of simple boring number adding, but hey when was the last time you added up your grocery list prices by hand huh?
With current P2SH and P2WSH multisignature schemes, if you have a 2-of-3 setup, then to spend, you need to provide two different signatures from two different public keys. With Taproot, you can create, using special moon math, a single public key that represents your 2-of-3 setup. Then you just put two of your devices together, have them communicate to each other (this can be done airgapped, in theory, by sending QR codes: the software to do this is not even being built yet, but that's because Taproot hasn't activated yet!), and they will make a single signature to authorize any spend from your 2-of-3 address. That's 73 witness bytes -- 18.25 virtual bytes -- of signatures you save!
And if you decide that your current setup with 1-of-1 P2PKH / P2WPKH addresses is just fine as-is: well, that's the whole point of a softfork: backwards-compatibility; you can receive from Taproot users just fine, and once your wallet is updated for Taproot-sending support, you can send to Taproot users just fine as well!
(P2WPKH and P2WSH -- SegWit v0 -- addresses start with bc1q; Taproot -- SegWit v1 --- addresses start with bc1p, in case you wanted to know the difference; in bech32 q is 0, p is 1)
Now how about HODLers who keep all, or some, of their coins on custodial services? Well, any custodial service worth its salt would be doing at least 2-of-3, or probably something even bigger, like 11-of-15. So your custodial service, if it switched to using Taproot internally, could save a lot more (imagine an 11-of-15 getting reduced from 11 signatures to just 1!), which --- we can only hope! --- should translate to lower fees and better customer service from your custodial service!
So I think we can say, very accurately, that the Bitcoin principle --- that YOU are in control of your money --- can only be helped by Taproot (if you are doing multisignature), and, because P2PKH and P2WPKH remain validly-usable addresses in a Taproot future, will not be harmed by Taproot. Its benefit to this principle might be small (it mostly only benefits multisignature users) but since it has no drawbacks with this (i.e. singlesig users can continue to use P2WPKH and P2PKH still) this is still a nice, tidy win!
(even singlesig users get a minor benefit, in that multisig users will now reduce their blockchain space footprint, so that fees can be kept low for everybody; so for example even if you have your single set of private keys engraved on titanium plates sealed in an airtight box stored in a safe buried in a desert protected by angry nomads riding giant sandworms because you're the frickin' Kwisatz Haderach, you still gain some benefit from Taproot)
And here's the important part: if P2PKH/P2WPKH is working perfectly fine with you and you decide to never use Taproot yourself, Taproot will not affect you detrimentally. First do no harm!

Taproot and Your Contracts

No one is an island, no one lives alone. Give and you shall receive. You know: by trading with other people, you can gain expertise in some obscure little necessity of the world (and greatly increase your productivity in that little field), and then trade the products of your expertise for necessities other people have created, all of you thereby gaining gains from trade.
So, contracts, which are basically enforceable agreements that facilitate trading with people who you do not personally know and therefore might not trust.
Let's start with a simple example. You want to buy some gewgaws from somebody. But you don't know them personally. The seller wants the money, you want their gewgaws, but because of the lack of trust (you don't know them!! what if they're scammers??) neither of you can benefit from gains from trade.
However, suppose both of you know of some entity that both of you trust. That entity can act as a trusted escrow. The entity provides you security: this enables the trade, allowing both of you to get gains from trade.
In Bitcoin-land, this can be implemented as a 2-of-3 multisignature. The three signatories in the multisgnature would be you, the gewgaw seller, and the escrow. You put the payment for the gewgaws into this 2-of-3 multisignature address.
Now, suppose it turns out neither of you are scammers (whaaaat!). You receive the gewgaws just fine and you're willing to pay up for them. Then you and the gewgaw seller just sign a transaction --- you and the gewgaw seller are 2, sufficient to trigger the 2-of-3 --- that spends from the 2-of-3 address to a singlesig the gewgaw seller wants (or whatever address the gewgaw seller wants).
But suppose some problem arises. The seller gave you gawgews instead of gewgaws. Or you decided to keep the gewgaws but not sign the transaction to release the funds to the seller. In either case, the escrow is notified, and if it can sign with you to refund the funds back to you (if the seller was a scammer) or it can sign with the seller to forward the funds to the seller (if you were a scammer).
Taproot helps with this: like mentioned above, it allows multisignature setups to produce only one signature, reducing blockchain space usage, and thus making contracts --- which require multiple people, by definition, you don't make contracts with yourself --- is made cheaper (which we hope enables more of these setups to happen for more gains from trade for everyone, also, moon and lambos).
(technology-wise, it's easier to make an n-of-n than a k-of-n, making a k-of-n would require a complex setup involving a long ritual with many communication rounds between the n participants, but an n-of-n can be done trivially with some moon math. You can, however, make what is effectively a 2-of-3 by using a three-branch SCRIPT: either 2-of-2 of you and seller, OR 2-of-2 of you and escrow, OR 2-of-2 of escrow and seller. Fortunately, Taproot adds a facility to embed a SCRIPT inside a public key, so you can have a 2-of-2 Taprooted address (between you and seller) with a SCRIPT branch that can instead be spent with 2-of-2 (you + escrow) OR 2-of-2 (seller + escrow), which implements the three-branched SCRIPT above. If neither of you are scammers (hopefully the common case) then you both sign using your keys and never have to contact the escrow, since you are just using the escrow public key without coordinating with them (because n-of-n is trivial but k-of-n requires setup with communication rounds), so in the "best case" where both of you are honest traders, you also get a privacy boost, in that the escrow never learns you have been trading on gewgaws, I mean ewww, gawgews are much better than gewgaws and therefore I now judge you for being a gewgaw enthusiast, you filthy gewgawer).

Taproot and Your Contracts, Part 2: Cryptographic Boogaloo

Now suppose you want to buy some data instead of things. For example, maybe you have some closed-source software in trial mode installed, and want to pay the developer for the full version. You want to pay for an activation code.
This can be done, today, by using an HTLC. The developer tells you the hash of the activation code. You pay to an HTLC, paying out to the developer if it reveals the preimage (the activation code), or refunding the money back to you after a pre-agreed timeout. If the developer claims the funds, it has to reveal the preimage, which is the activation code, and you can now activate your software. If the developer does not claim the funds by the timeout, you get refunded.
And you can do that, with HTLCs, today.
Of course, HTLCs do have problems:
Fortunately, with Schnorr (which is enabled by Taproot), we can now use the Scriptless Script constuction by Andrew Poelstra. This Scriptless Script allows a new construction, the PTLC or Pointlocked Timelocked Contract. Instead of hashes and preimages, just replace "hash" with "point" and "preimage" with "scalar".
Or as you might know them: "point" is really "public key" and "scalar" is really a "private key". What a PTLC does is that, given a particular public key, the pointlocked branch can be spent only if the spender reveals the private key of the given private key to you.
Another nice thing with PTLCs is that they are deniable. What appears onchain is just a single 2-of-2 signature between you and the developemanufacturer. It's like a magic trick. This signature has no special watermarks, it's a perfectly normal signature (the pledge). However, from this signature, plus some datta given to you by the developemanufacturer (known as the adaptor signature) you can derive the private key of a particular public key you both agree on (the turn). Anyone scraping the blockchain will just see signatures that look just like every other signature, and as long as nobody manages to hack you and get a copy of the adaptor signature or the private key, they cannot get the private key behind the public key (point) that the pointlocked branch needs (the prestige).
(Just to be clear, the public key you are getting the private key from, is distinct from the public key that the developemanufacturer will use for its funds. The activation key is different from the developer's onchain Bitcoin key, and it is the activation key whose private key you will be learning, not the developer's/manufacturer's onchain Bitcoin key).
So:
Taproot lets PTLCs exist onchain because they enable Schnorr, which is a requirement of PTLCs / Scriptless Script.
(technology-wise, take note that Scriptless Script works only for the "pointlocked" branch of the contract; you need normal Script, or a pre-signed nLockTimed transaction, for the "timelocked" branch. Since Taproot can embed a script, you can have the Taproot pubkey be a 2-of-2 to implement the Scriptless Script "pointlocked" branch, then have a hidden script that lets you recover the funds with an OP_CHECKLOCKTIMEVERIFY after the timeout if the seller does not claim the funds.)

Quantum Quibbles!

Now if you were really paying attention, you might have noticed this parenthetical:
(technical details: a Taproot output is 1 version byte + 32 byte public key, while a P2WPKH (bech32 singlesig) output is 1 version byte + 20 byte public key hash...)
So wait, Taproot uses raw 32-byte public keys, and not public key hashes? Isn't that more quantum-vulnerable??
Well, in theory yes. In practice, they probably are not.
It's not that hashes can be broken by quantum computes --- they're still not. Instead, you have to look at how you spend from a P2WPKH/P2PKH pay-to-public-key-hash.
When you spend from a P2PKH / P2WPKH, you have to reveal the public key. Then Bitcoin hashes it and checks if this matches with the public-key-hash, and only then actually validates the signature for that public key.
So an unconfirmed transaction, floating in the mempools of nodes globally, will show, in plain sight for everyone to see, your public key.
(public keys should be public, that's why they're called public keys, LOL)
And if quantum computers are fast enough to be of concern, then they are probably fast enough that, in the several minutes to several hours from broadcast to confirmation, they have already cracked the public key that is openly broadcast with your transaction. The owner of the quantum computer can now replace your unconfirmed transaction with one that pays the funds to itself. Even if you did not opt-in RBF, miners are still incentivized to support RBF on RBF-disabled transactions.
So the extra hash is not as significant a protection against quantum computers as you might think. Instead, the extra hash-and-compare needed is just extra validation effort.
Further, if you have ever, in the past, spent from the address, then there exists already a transaction indelibly stored on the blockchain, openly displaying the public key from which quantum computers can derive the private key. So those are still vulnerable to quantum computers.
For the most part, the cryptographers behind Taproot (and Bitcoin Core) are of the opinion that quantum computers capable of cracking Bitcoin pubkeys are unlikely to appear within a decade or two.
So:
For now, the homomorphic and linear properties of elliptic curve cryptography provide a lot of benefits --- particularly the linearity property is what enables Scriptless Script and simple multisignature (i.e. multisignatures that are just 1 signature onchain). So it might be a good idea to take advantage of them now while we are still fairly safe against quantum computers. It seems likely that quantum-safe signature schemes are nonlinear (thus losing these advantages).

Summary

I Wanna Be The Taprooter!

So, do you want to help activate Taproot? Here's what you, mister sovereign Bitcoin HODLer, can do!

But I Hate Taproot!!

That's fine!

Discussions About Taproot Activation

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I bought some BTC and it received a BlockChain address.

Hello there,
Hello,

I made a Crypto purchase from Shapeshift yesterday, which was fulfilled by one of their partners called BANXA. I just received an email saying "Your order has been fulfilled and you will receive your bitcoin shortly in the address provided" with a link opening to Block explorer. With a QR code and two buttons "Payment request" and "Donation". And a Bech32 (P2WPKH) 42 Alphanumerical code that I got no clue how to use. I have tried scanning the code with bloackchain app and coinomi but

I have contacted their support. Opened wallets in Portis, Electrum, Blockchain and Coinomi but with no idea how to receive that 42 code to one of my wallets. How do I get it to move?

Thank you.

Getting many pms

submitted by BoazRanger to BitcoinBeginners [link] [comments]

Bittrex Review: One of the First Crypto Exchanges Part 2

Bittrex Review: One of the First Crypto Exchanges Part 2

3. Fiat Currency Deposits, Trading, and Withdrawals

Bittrex Global supports euro trading, deposits, and withdrawals for eligible personal and corporate accounts. Please note that euro trading is offered by Bittrex Global and subject to the Bittrex Global Terms of Service.
There are three mechanisms available for depositing euros to your Bittrex Global account:
  • SEPA Credit Transfer
  • International Wire Transfer
  • Credit/debit card
Bittrex Global allows you to withdraw Euros to your bank account via either SEPA credit transfer or international wire transfer.
  • Minimum Deposit: 20 euros
  • Minimum Withdrawal: 10 euros
  • Minimum Deposit: 20 euros
No upper limits deposit or withdrawal for wire and SEPA transactions. Corporate account holders can withdraw up to 10,000,000 euros in one transaction after submitting an application to [[email protected]](mailto:[email protected])
If the name on your bank account is the same as the name in your Bittrex Global account, you can deposit euros by following the instructions on the SEPA deposit screen. You can get to this screen by going to your Holdings page, finding the EUR currency, clicking Deposit, and selecting SEPA.
https://preview.redd.it/ca7faux9ied51.jpg?width=974&format=pjpg&auto=webp&s=0993b8750b71e7467e15bb649f02c7c45f17f558
SEPA Transfer Instructions.
https://preview.redd.it/njwwpr8cied51.jpg?width=974&format=pjpg&auto=webp&s=8218dfcabf7e7f2e98f8db5e3e30f676baf10c6c
Recipient name: Bittrex International GmbHRecipient address: Äulestrasse 74 9490 Vaduz, LiechtensteinIBAN number: LI26 0881 1010 3179 K001 E
Make sure you accurately type the above text in SEPA transfer memo/notes to properly course the deposit for your account. If the name on your bank account differs from that in your Bittrex Global account, or if you wish to withdraw via SEPA without depositing, you will need to fill out the Euro Deposit and Withdrawal form https://bittrexglobal.zendesk.com/hc/en-us/requests/new?ticket_form_id=360000640760 to have your bank account whitelisted for use with your Bittrex Global account.
https://preview.redd.it/qk3k15snied51.jpg?width=974&format=pjpg&auto=webp&s=a641af8287d7624c9a68e69b5eede7a26dd00f65
https://preview.redd.it/stsxd6snied51.jpg?width=974&format=pjpg&auto=webp&s=b38ef3a190cfba71f041fb2a2947a27ba6931c38

Depositing USD on Bittrex

Crypto assets ensure that replenishment and all exchange transactions are kept through digital currency. Therefore, in case you need to withdraw cash, you must first convert it into Bitcoin (BTC).
At the same time, there may be some other ways to refill the balance with US dollars, which entails filling a particular form for depositing in dollars—Fiat USD trading Request.
To gain a digital currency on the exchange you need to visit your private account and find the Wallets section where all the wallets are shown.
The platform creates a crypto address to which we transfer funds. Money can be credited to the exchange within two days, with the time required depending on the currency and mode of payment (e.g. bank transfer, credit or debit card, and so on).
Therefore, after the transfer, the funds are credited to the exchange's internal wallet.
In order to include a user account for depositing and withdrawing funds in dollars, Bittrex must add the user’s bank account to the white list. Therefore, to replenish the balance with fiat money, you must fill a special form.
  1. Obtain approval for Fiat (USD) Trading, Deposits, and Withdrawals.
To do this, fill out and submit the form: https://bittrexglobal.zendesk.com/hc/en-us/requests/new?ticket_form_id=360000352300
https://preview.redd.it/jwcp2jguied51.jpg?width=861&format=pjpg&auto=webp&s=9ef519cbcf579cc3567e53b55af29fa154e342e3
Keep in mind that wire transfers can only be received from bank accounts approved through the fiat trading application.
2) Make sure your bank account has been whitelisted.
Sign in to your Bittrex Global account. Go to the Holdings Tab. Type “US Dollar” in the search bar. Click the Withdraw button beneath Actions. All available whitelisted (approved) bank accounts will be shown.
https://preview.redd.it/ldwmvt3wied51.jpg?width=974&format=pjpg&auto=webp&s=71d3da503e050f5b4d231184ea82f65fd477b671
3) Generate your USD deposit code.
To get a USD deposit code, click the Holdings tab. Type “US dollar” in the search bar, click Deposit beneath Actions. Your USD deposit code will appear at the bottom of your Wire Transfer Instructions. Copy this code and input it in the memo/notes subject of the wire transfer form to your financial institution.
https://preview.redd.it/pf7sowxxied51.jpg?width=974&format=pjpg&auto=webp&s=c99b3c10a1921254e8247c77a04f529bc60e290b
Use your USD deposit code every time making wire transfers. Wire transfers cannot be processed without a correct USD deposit code.
4) Best practice: Use the wire transfer information provided in your USD wallet when asking your bank for assistance.
Bittrex recommends that users resort to a local bank branch when sending wire transfers for the first time.
To show wire info, enter the "US dollar” in the search bar at the bottom of the Holdings page. Then click Deposit beneath Actions. You will see all the wire information. Use the deposit data to fill out a wire transfer form correctly. In case the info does not appear or if you have questions, please contact Bittrex Global support.
Make sure the wire transfer is not sent as an ACH transfer. ACH transfers aren't permitted so they will be banned.
Be aware: Wire deposits (wires sent to Bittrex Global) CANNOT be initiated on the Bittrex Global webpage. Only withdrawal wires can be initiated on the webpage. All wire transfers must be processed from the bank account number that was provided to Bittrex Global, in your fiat money transfer application.
5) Wait for the amount to be credited to your Bittrex Account.
All USD deposits are credited the same or next-business-day once settled in Bittrex's bank account.
Wires take 5-10 days to settle.
More delays will occur if the wire data does not fit the whitelist.
Wire transfer charges: Bittrex exchange does not take any wire transfer fee. Please ask your bank about the commission it charges for sending or getting a wire transfer. International banks usually involve mediators so check the commission the intermediary charges for their services.

Depositing Euros on Bittrex

There are three ways available for depositing Euros into Bittrex Global account:
  • SEPA Credit Transfer
  • International Wire Transfer
  • Credit/debit card
If you need to wire-transfer euros to a Bittrex Exchange Account, you will have to do the following:
  1. Obtain approval for EUR Deposits and Withdrawals.
To do this, fill out and submit the form: https://bittrexglobal.zendesk.com/hc/en-us/requests/new?ticket_form_id=360000640760
https://preview.redd.it/cq1fll73jed51.jpg?width=801&format=pjpg&auto=webp&s=b9b199d7bae9d9127b41cd72eec6619c05f2dcb3
  1. Make sure your bank account has been whitelisted.
Sign in to your Bittrex Global account. Go to the Holdings Tab. Type “EUR” in the search bar. Click the Withdraw button beneath Actions. All available whitelisted (approved) bank accounts will be shown.
https://preview.redd.it/26g4bz36jed51.jpg?width=974&format=pjpg&auto=webp&s=a2457611bdca65ad15320ceba583b51a797d357a
3) Go to the Holdings tab. Type “EUR” in the search bar. Click the Deposits button beneath Actions.
https://preview.redd.it/l0q8hkcajed51.jpg?width=974&format=pjpg&auto=webp&s=6d7bf1fd2cc0185c13ddc89f91c35061bf5249ef
Deposit SEPA Transfer.
https://preview.redd.it/5eb44h9djed51.jpg?width=974&format=pjpg&auto=webp&s=4c4433c87b633d8b69d5c26ef067a63129baf8fe
Make sure to include the text above in your SEPA switch memo/notes to perform a deposit to your account correctly.
No primary deposit is needed, but you need to provide details on the institution managing your account.
Attachment requirement: a bank-issued letter or account statement displaying containing the following data:
  1. Your name on your bank account.
  2. Your bank IBAN or account number.
  3. Your bank SWIFT/BIC code.
  4. Your bank name.
  5. Approval to deposit euros from and withdraw euros to your approved bank account.
  6. You can have multiple bank accounts approved.
  7. All banking details in the form (IBAN, Account, SWIFT/BIC, etc.).
  • Minimum Deposit: 20 euros
  • Minimum Withdrawal: 10 euros
  • No maximum deposit or withdrawal for wire and SEPA transfers
Corporate account holders can withdraw up to 10,000,000 euros in one transaction after submitting a request to [[email protected]](mailto:[email protected]).

Debit and Credit Card Transactions on Bittrex Global

To use a debit or credit card in your Bittrex Global Account do the following:
  • Click Holdings in the upper-right corner of the home page
  • Select Deposit via credit/debit card
  • Enter an amount to buy (weekly limit: $2,500/monthly limit: $7,500)
  • Click Enter card info next
  • Enter your credit card data
  • Carefully read the privacy policy and transfer terms
  • Click Pay
After the submission, you will be redirected to your bank’s 3DSecure portal (follow the prompts to confirm the transaction).
As soon as the transaction is permitted, the funds may be credited to your wallet. You can track the transfer progress in the Deposits section of the Holdings page.
  • Credit Cards Accepted: Visa
  • Processing Fee: 3%
  • Daily Limit: $2,500
  • Weekly Limit: $2,500
  • Monthly Limit: $7,500
  • Alternative Options to Fund your Wallet: USD Wire Transfers (No Deposit Limit)

Countries Supported

Andorra, Austria, Australia, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hong Kong, Hungary, Iceland, India, Indonesia, Ireland, Italy, Japan, Kosovo, Latvia, Liechtenstein, Lithuania, Luxembourg, Malaysia, Malta, Monaco, Montenegro, Netherlands, New Zealand, Norway, Philippines, Portugal, Reunion, San Marino, Singapore, Slovakia, Slovenia, South Korea, Sweden, Switzerland, Taiwan, United Kingdom, Vietnam.

Depositing Coins/Tokens on Bittrex Crypto Exchange

To deposit crypto coins to your Bittrex exchange account, you will need to take a few important steps. It's critical to be especially careful to make your deposit as secure as possible.
To deposit coins to Bittrex Global, do the following:
  1. Click Holdings in the upper-right corner of the home page.
https://preview.redd.it/7h6ihk2ijed51.jpg?width=974&format=pjpg&auto=webp&s=bc1dceb15f0a93bf1c555ed75032f9ec1792ac1b
2) Find for the wallet you want to deposit funds to and click Deposit beneath the Actions tab.
https://preview.redd.it/ujrsrpljjed51.jpg?width=974&format=pjpg&auto=webp&s=fb96e242ac86bcbce02923f34e6e36179308d895
3) Please copy your Wallet Address to make a deposit. In case you don’t have any Wallet Address, click Generate new wallet address.
Below is the option of creating a deposit address for Bitcoin (BTC).
https://preview.redd.it/pqpkfmbljed51.jpg?width=970&format=pjpg&auto=webp&s=a3af6d68c0698907ce338a7dea4bb7f58653f423
A few cash and tokens have a minimum deposit amount. For instance, your Ethereum deposit address must hold extra than 0.05 ETH before crediting to your account.
If you deposit less than 0.05 ETH, you may want to deposit some amount on the blockchain amounts to more than 0.05 ETH. In case you send a deposit smaller than the minimum, you will have to make another deposit to reach the minimum amount.
Please make sure that you transfer coins of the same type to the address. This means if you generated a BTC deal, you deposit BTC to it and no other coin. In case you deposit a different coin than that of the deal, you take a risk of losing all the concerned funds.

Depositing Tether (USDT) Stablecoin

Below is the option of creating a deposit address for Tether (USDT).
  1. Click Holdings in the upper-right corner of the home page.
Find Tether USDT, and click Deposit beneath the Actions tab.
https://preview.redd.it/kc61io6qjed51.jpg?width=974&format=pjpg&auto=webp&s=7baed4d68fbf51dacc4e667b04501868645d1d57
2) Please copy the USDTT Wallet Address to make a deposit. In case you don’t have any USDTT Wallet Address, click Generate new wallet address.
https://preview.redd.it/ugh3b54tjed51.jpg?width=974&format=pjpg&auto=webp&s=0e272a481854b32407a6611690c501370431f47c
https://preview.redd.it/ph20s84tjed51.jpg?width=360&format=pjpg&auto=webp&s=0e92999e9b85d4aa2d590db15e631690530f4825
3) Copy this crypto address and paste it to the Etherscan.io search bar.
Click Search.
You will see the contract info. Click to view a QR code.
A new window will appear, showing a QR code of your USDT wallet address. Be careful and check the correctness of your USDT transaction to your account on the Bittrex exchange.
https://preview.redd.it/g2ar653yjed51.jpg?width=974&format=pjpg&auto=webp&s=ddc947f57b616316bcb010f8aa1bb02ccdb22389
You can check any Tether USDT ERC20 token transaction on the Ethereum blockchain. When a transaction happens, you will see the transaction hash and balance.
https://preview.redd.it/y11afeyyjed51.jpg?width=974&format=pjpg&auto=webp&s=40d1682638c462f8cb3a06c8e0d04dc6a99eeb35
Once the transaction is confirmed on the blockchain, the Tether USDT will be credited to the balance sheet and you will find them in the Balances section.
Other USDT deposits can be found in the Deposit History section.
https://preview.redd.it/81j8rue1ked51.jpg?width=974&format=pjpg&auto=webp&s=d6683000c5d7ddffc124352a0be7590f43cad6d4
The full version
First part
submitted by mPrestige to revain_org [link] [comments]

Crypto Weekly News — September, 11

What important crypto events happened last week?
Cryptocurrencies
VeChain: New Consensus Algorithm Offers Strong Performance And Security
The VeChainThor blockchain will receive a new consensus algorithm called SURFACE or Proof of Authority 2.0 (PoA 2.0). The double consensus model gives users the ability to choose different levels of security for their transactions.
Chainlink Surges 25% Higher As Altcoin Market Recovers
Some altcoins have suffered in the past few days, dropping significantly from their recent highs. During this time, LINK underwent a strong leap that lifted the cryptocurrency by 25%. Analysts are divided on what comes next with Chainlink.
Monero Is Traceable Using New CipherTrace Tool
Analyst firm CipherTrace has unveiled a first-of-its-kind tool for tracking transaction flows in Monero (XMR) at the request of the US Department of Homeland Security. The new tool will allow tracking of stolen coins and those used for illegal transactions.
Updates
MetaMask Has Launched Its Ethereum Wallet For iOS And Android
Starting September 4, Android and iOS users are required to download a full mobile version with the ability to interact with dApps. To synchronize history and import existing wallets, the user just needs to scan the QR code.
Crypto Exchange Bitstamp Exploring 25 New Tokens For Listing
The list, published on September 3, includes Augur (REP), Maker (MKR), Polkadot (DOT), Chainlink (LINK), Tezos (XTZ), Cardano (ADA), Kyber Network (KNC) and others. Bitstamp is known for its extremely conservative approach to the listing of new coins. The marketplace currently supports only seven crypto assets.
OKEx Officially Ranked The World’s Largest Crypto Derivatives Exchange
CoinDesk Research analyzed and evaluated data from CoinGecko, according to which the value of outstanding contracts on OKEx at the end of last month was $1.6 billion, making it the largest crypto derivatives exchange in the world.
Binance Launches DeFi-Styled Automated Market Maker Pool
Binance Liquid Swap is based on a variety of liquidity pools, allowing crypto assets to be swapped using the Automatic Market Maker (AMM) pricing algorithm instead of the order book. This guarantees price stability and lower transaction fees. The new trading feature allows users to pool tokens for instant liquidity and earnings.
Law, Cybercrimes, Mass Adoption
Mastercard Releases Platform Enabling Central Banks To Test Digital Currencies
The project is a controlled environment in which banks can simulate the issuance of national digital currencies. The result will be an assessment of their compatibility with the existing payment ecosystem and the practicality of using CBDC.
Eterbase: A New Attack On A Crypto Exchange
On September 8, unknown persons hacked Eterbase cryptocurrency exchange located in Slovakia. The site announced the loss of user funds in Bitcoin, Ethereum, Tron, XRP, Tezos, and Algorand totaling over $5.3 million. Representatives of Eterbase said that they contacted all centralized exchanges to which the stolen funds were sent.
US Crypto Adoption Rate Lags Behind Russia and China
Recent data showed an astonishing first place for Ukraine in the 2020 Global Adoption Index, followed by Russia and Venezuela. The index considers the total cost of online transactions, the cost of online retail transfers, and the number of cryptocurrency deposits online. The index also takes into account the volume of transactions made on P2P cryptocurrency exchanges.
Just Eat In France Accepts Bitcoin, Bitcoin Cash And Ethereum
The integration of cryptocurrencies into more than 15,000 restaurants in France was carried out through the Bitpay payment service. This initiative can promote the use of cryptocurrencies among the general public in a more democratic manner. Bitcoin conversion will be carried out in accordance with Bitpay's own quotes.
That’s all for now! For more details follow us on Twitter, subscribe to our YouTube channel, join our Telegram.
submitted by CoinjoyAssistant to u/CoinjoyAssistant [link] [comments]

Crypto Weekly News — September, 11

What important crypto events happened last week?

Cryptocurrencies

VeChain: New Consensus Algorithm Offers Strong Performance And Security
The VeChainThor blockchain will receive a new consensus algorithm called SURFACE or Proof of Authority 2.0 (PoA 2.0). The double consensus model gives users the ability to choose different levels of security for their transactions.
Chainlink Surges 25% Higher As Altcoin Market Recovers
Some altcoins have suffered in the past few days, dropping significantly from their recent highs. During this time, LINK underwent a strong leap that lifted the cryptocurrency by 25%. Analysts are divided on what comes next with Chainlink.
Monero Is Traceable Using New CipherTrace Tool
Analyst firm CipherTrace has unveiled a first-of-its-kind tool for tracking transaction flows in Monero (XMR) at the request of the US Department of Homeland Security. The new tool will allow tracking of stolen coins and those used for illegal transactions.

Updates

MetaMask Has Launched Its Ethereum Wallet For iOS And Android
Starting September 4, Android and iOS users are required to download a full mobile version with the ability to interact with dApps. To synchronize history and import existing wallets, the user just needs to scan the QR code.
Crypto Exchange Bitstamp Exploring 25 New Tokens For Listing
The list, published on September 3, includes Augur (REP), Maker (MKR), Polkadot (DOT), Chainlink (LINK), Tezos (XTZ), Cardano (ADA), Kyber Network (KNC) and others. Bitstamp is known for its extremely conservative approach to the listing of new coins. The marketplace currently supports only seven crypto assets.
OKEx Officially Ranked The World’s Largest Crypto Derivatives Exchange
CoinDesk Research analyzed and evaluated data from CoinGecko, according to which the value of outstanding contracts on OKEx at the end of last month was $1.6 billion, making it the largest crypto derivatives exchange in the world.
Binance Launches DeFi-Styled Automated Market Maker Pool
Binance Liquid Swap is based on a variety of liquidity pools, allowing crypto assets to be swapped using the Automatic Market Maker (AMM) pricing algorithm instead of the order book. This guarantees price stability and lower transaction fees. The new trading feature allows users to pool tokens for instant liquidity and earnings.

Law, Cybercrimes, Mass Adoption

Mastercard Releases Platform Enabling Central Banks To Test Digital Currencies
The project is a controlled environment in which banks can simulate the issuance of national digital currencies. The result will be an assessment of their compatibility with the existing payment ecosystem and the practicality of using CBDC.
Eterbase: A New Attack On A Crypto Exchange
On September 8, unknown persons hacked Eterbase cryptocurrency exchange located in Slovakia. The site announced the loss of user funds in Bitcoin, Ethereum, Tron, XRP, Tezos, and Algorand totaling over $5.3 million. Representatives of Eterbase said that they contacted all centralized exchanges to which the stolen funds were sent.
US Crypto Adoption Rate Lags Behind Russia and China
Recent data showed an astonishing first place for Ukraine in the 2020 Global Adoption Index, followed by Russia and Venezuela. The index considers the total cost of online transactions, the cost of online retail transfers, and the number of cryptocurrency deposits online. The index also takes into account the volume of transactions made on P2P cryptocurrency exchanges.
Just Eat In France Accepts Bitcoin, Bitcoin Cash And Ethereum
The integration of cryptocurrencies into more than 15,000 restaurants in France was carried out through the Bitpay payment service. This initiative can promote the use of cryptocurrencies among the general public in a more democratic manner. Bitcoin conversion will be carried out in accordance with Bitpay's own quotes.
That’s all for now! For more details follow us on Twitter, subscribe to our YouTube channel, join our Telegram.
submitted by CoinjoyAssistant to btc [link] [comments]

Crypto Weekly News — September, 11

What important crypto events happened last week?

Cryptocurrencies

VeChain: New Consensus Algorithm Offers Strong Performance And Security
The VeChainThor blockchain will receive a new consensus algorithm called SURFACE or Proof of Authority 2.0 (PoA 2.0). The double consensus model gives users the ability to choose different levels of security for their transactions.
Chainlink Surges 25% Higher As Altcoin Market Recovers
Some altcoins have suffered in the past few days, dropping significantly from their recent highs. During this time, LINK underwent a strong leap that lifted the cryptocurrency by 25%. Analysts are divided on what comes next with Chainlink.
Monero Is Traceable Using New CipherTrace Tool
Analyst firm CipherTrace has unveiled a first-of-its-kind tool for tracking transaction flows in Monero (XMR) at the request of the US Department of Homeland Security. The new tool will allow tracking of stolen coins and those used for illegal transactions.

Updates

MetaMask Has Launched Its Ethereum Wallet For iOS And Android
Starting September 4, Android and iOS users are required to download a full mobile version with the ability to interact with dApps. To synchronize history and import existing wallets, the user just needs to scan the QR code.
Crypto Exchange Bitstamp Exploring 25 New Tokens For Listing
The list, published on September 3, includes Augur (REP), Maker (MKR), Polkadot (DOT), Chainlink (LINK), Tezos (XTZ), Cardano (ADA), Kyber Network (KNC) and others. Bitstamp is known for its extremely conservative approach to the listing of new coins. The marketplace currently supports only seven crypto assets.
OKEx Officially Ranked The World’s Largest Crypto Derivatives Exchange
CoinDesk Research analyzed and evaluated data from CoinGecko, according to which the value of outstanding contracts on OKEx at the end of last month was $1.6 billion, making it the largest crypto derivatives exchange in the world.
Binance Launches DeFi-Styled Automated Market Maker Pool
Binance Liquid Swap is based on a variety of liquidity pools, allowing crypto assets to be swapped using the Automatic Market Maker (AMM) pricing algorithm instead of the order book. This guarantees price stability and lower transaction fees. The new trading feature allows users to pool tokens for instant liquidity and earnings.

Law, Cybercrimes, Mass Adoption

Mastercard Releases Platform Enabling Central Banks To Test Digital Currencies
The project is a controlled environment in which banks can simulate the issuance of national digital currencies. The result will be an assessment of their compatibility with the existing payment ecosystem and the practicality of using CBDC.
Eterbase: A New Attack On A Crypto Exchange
On September 8, unknown persons hacked Eterbase cryptocurrency exchange located in Slovakia. The site announced the loss of user funds in Bitcoin, Ethereum, Tron, XRP, Tezos, and Algorand totaling over $5.3 million. Representatives of Eterbase said that they contacted all centralized exchanges to which the stolen funds were sent.
US Crypto Adoption Rate Lags Behind Russia and China
Recent data showed an astonishing first place for Ukraine in the 2020 Global Adoption Index, followed by Russia and Venezuela. The index considers the total cost of online transactions, the cost of online retail transfers, and the number of cryptocurrency deposits online. The index also takes into account the volume of transactions made on P2P cryptocurrency exchanges.
Just Eat In France Accepts Bitcoin, Bitcoin Cash And Ethereum
The integration of cryptocurrencies into more than 15,000 restaurants in France was carried out through the Bitpay payment service. This initiative can promote the use of cryptocurrencies among the general public in a more democratic manner. Bitcoin conversion will be carried out in accordance with Bitpay's own quotes.
That’s all for now! For more details follow us on Twitter, subscribe to our YouTube channel, join our Telegram.
submitted by CoinjoyAssistant to u/CoinjoyAssistant [link] [comments]

The Different Types of Crypto Wallets

Cryptocurrency wallet is a set of private and public keys that validates the ownership of a digital asset (e.g. Bitcoin), and allows the wallet owner to send and receive digital assets or even store them. There are several types of wallets that can store your crypto holdings, some more secure than other, some are easily accessible and some are dedicated to certain assets. There are two types of wallets, Hot wallets and Cold wallets. The hot wallets are connected to the internet which makes transfers of coins and tokens faster and on hand, yet are more susceptible to viruses and hackers. The cold wallet refers to the cryptocurrency wallets that are offline. Generally cold storage is more secure, but are limited to a selection of coins and tokens you can store.
Software Wallets
Software wallets, as the name suggests, are downloaded and installed on desktops and laptops; they reside on a desktop which can only be accessed on that device where they are installed. They do provide a good level of security but many things could happen to your device, such as viruses or a hardware issue which could deny you access to the wallet, so its recommended to export your wallet private keys and store your login and password on a USB stick or on another device. You can re-install the software on a new device and use your login/password along with the exported private keys to access your funds. One of the most popular software wallets available for free is Exodus were you can store over a 100 cryptocurrency assets.
Paper Wallets
One of the first crypto wallets 1st used in the early 2010s which contains your wallet address, private keys and a QR code representing these keys, which eases the transfer and receiving of coins or tokens. Rather than typing each letter and number of the address which could be hectic, one can just scan the QR code and request or receive the asset. Paper wallets ensure security by preventing your private keys from being exposed online upon creation as its stored physically and not on a computer or online. Theoretically it is strong but physically it is weak, it’s great to have a free wallet that never exposes your private keys online at any point. A paper wallet is not made from a strong and durable material such as metal or plastic, paper can easily tear, burn, the print can fade away from sun exposer, it can get wet and even get lost. Therefore, many have considered this option of the past and are utilizing other safer options to store their cryptos. Here you can create your own paper wallet via the wallet generator.
Mobile/App Wallet
Mobile wallets are considered to be the most popular and commonly used type of wallets; they are apps installed on mobile devices and their main advantage is the swift accessibility to funds. Accessing a bunch of features such as sending, receiving, storing, spending. The user-friendly mobile wallet app like crypto.com has multiple services built-ins, you can do all the functions mentioned above, and you also have the option to stake your cryptos and earn profit, you can buy and trade cryptos to add to your existing portfolio at low fees and even request for a loan.
Many upcoming coins and tokens have used 3rd party wallets to store their coins or even have no supported wallets at the early stage which makes them fully dependent of exchanges to store their coins or tokens. Solid crypto projects typically build their own wallets at an early stage; during or post (ICO, IEO, public and private sale) when they distribute their coins/tokens to users. iOWNX is one of the projects that built a dedicated wallet where you can store both Ethereum and iOWN Tokens with several security measures to protect your assets. You can install the wallet app on both Apple and Android for free.
Hardware Wallet
Known as a “Cold Wallet” which is a physical device and considered to be the safest wallet. Hardware wallet securely stores your private and public keys and typically looks like a USB drive and is resistant to computer viruses. Long term crypto holders prefer a cold wallet as it remains offline most of the time. The wallets are made of metal and hard plastic with an input screen to insert your pin number and in case you lose the device, you can purchase another one and insert your 24-paraphrases known as seed key which was created on your previous device, and access your funds. There are several hardware wallets available in the market; the 2 most popular ones are the Nano Ledger that sell devices from $36 to $148 and the Trezor Wallet which goes for around the same price bracket.
Exchange Wallets
Exchange wallets access blockchain through a browser interface without having to download or install any software. The advantage of the exchange wallets is the ease of accessibility to funds if you are an active trader and require direct access to your funds to be able to trade, rather than transferring coins and tokens from a different wallet which could take some time and fees that disables you to instantly trade at a certain price. The downside of storing your cryptos on an exchange wallet is that some service providers hold and manage the wallet’s private keys on your behalf. Although this may sound more convenient for inexperienced users, it is surely not the best practice. When using cryptocurrency exchanges, you should consider that they provide a high security feature and protection tools such as device management, multi-factor authentication, anti-phishing code, and withdrawal address management. It is highly recommended to store the majority of your coins and tokens in a safer wallet and keep some on the exchange for trading purposes.
There are many types of wallets to choose from to securely store your cryptocurrencies, yet there is not a perfect wallet in existence. Your personal needs and requirements will ultimately guide you to the type of wallets that fits your need. If you are looking for a quick “send and receive” in a few taps then mobile app wallets could be an option. If you are more of a “hodler” and believe in long term store value then Hardware wallets could be the wallet for you. Presuming that you are a swing or an active crypto trader which requires your funds to be available on demand, then storing it on trading platforms and exchanges is convenient, as you can trade your coin or tokens for others and vice versa, instantly without the need to transfer, send and unlocking wallets to access your funds (which requires a bit of time and gas fees).
We hope that you found this guide helpful and that you will be able to find the right crypto wallet that fits your requirement. For more information, you can check out our video “Intro to Crypto Wallets“ which covers in details all types of wallets.
submitted by Iowntoken to u/Iowntoken [link] [comments]

I need a new bitcoin address

I am trying to remove funds from a website, but had to cancel the first request. Now that I am trying again the site is requesting a new bitcoin address to send the funds to. According to a google search I should be able to create a new address by hitting a "details" button next to the QR code... But that does not seem to exist. Any help would be appreciated.
submitted by bigmattson to CoinBase [link] [comments]

Person claiming to be a Shopify employer wants me to use Bitcoin to buy equipment. Is this a Scam?

Person claiming to be a Shopify employer wants me to use Bitcoin to buy equipment. Is this a Scam?
First, I received this text message:

https://preview.redd.it/n4ieashhvn651.png?width=1080&format=png&auto=webp&s=5849e6ce82bd56f282379d4a02dc8f6a9cb39e93
Then, I talked to Stacey Williams over Google Hangouts about working at Shopify. Everything started out okay, and she sent me a check of $2,450 to use on equipment.
That's when things became weird. She requested that I use the money to buy bitcoin first from some random street vendor, and then to use the bitcoin to buy the equipment. I politely suggested that this felt dubious and asked her for assurance of her authenticity. Was she actually a Shopify employer?
She immediately said that she was offended and started using high-pressure tactics on me, telling me to just go and get the bitcoin or else I wouldn't be hired. I repeatedly asked for assurance of authenticity, and she repeatedly ignored these requests and used high-pressure tactics to get me to buy the bitcoin.
These are the bitcoin-buying instructions she sent me:
  • Click “Buy Bitcoins”
  • Provide mobile number
  • Enter received validation code
  • Scan fingerprint
  • Select coin (this type of machine may support not only Bitcoin, but also Litecoin, Dogecoin, Blackcoin, XCurrency)SELECT BITCOIN
  • Choose to scan wallet (pre-defined) or generate new
  • Scan wallet QR code if chosen
  • Insert cash bills
  • Click send
  • Get printed receipt
I refused to go immediately buy bitcoin and am currently trying to contact Shopify (unsuccessfully) to ask about this strange hiring process, and for assurance of authenticity. She is now demanding that I return the $2,450, which I am definitely going to do.
So what's going on here? Is this a scam?
submitted by realreddituser666 to Scams [link] [comments]

One of The Easiest Ways to Get Bitcoin NOW! For Beginners.

Hi, Friends. Here is what I did to get bitcoin fast. *Please note this is not the most private way*. You may need a BTC to your currency converter for convenience.
Go to CashApp on your mobile device and purchase bitcoin after going through their initial verification process. Then, on your MAIN DEVICE download a light bitcoin wallet (good for beginners) and from the MD (main device) wallet hit Request Bitcoin (or whatever it is titled) to generate an address and/or a QR Code. From your phone, send bitcoin (whatever amount) and scan the QR Code or input the address from the MD Wallet. This will generate the amount you are trying to send.
Now, the transaction is going through the blockchain. You can check the transaction as it flows through the blockchain here: https://blockstream.info/. Usually a link will generate so you can check from the wallet. CashApp doesn't charge you anything to transfer to another wallet.
You should be alerted by CashApp when the transaction is confirmed through the blockchain.
Boom you have bitcoin in your MD Wallet.
Here you can check the charts: https://www.tradingview.com/symbols/BTCUSD/
submitted by jeremyhunt1995 to HowToBuyBitcoin [link] [comments]

One of The Easiest Ways to Get Bitcoin NOW! For Beginners.

Hi, Friends. Here is what I did to get bitcoin fast. *Please note this is not the most private way*. You may need a BTC to your currency converter for convenience.
Go to CashApp on your mobile device and purchase bitcoin after going through their initial verification process. Then, on your MAIN DEVICE download a light bitcoin wallet (good for beginners) and from the MD (main device) wallet hit Request Bitcoin (or whatever it is titled) to generate an address and/or a QR Code. From your phone, send bitcoin (whatever amount) and scan the QR Code or input the address from the MD Wallet. This will generate the amount you are trying to send.
Now, the transaction is going through the blockchain. You can check the transaction as it flows through the blockchain here: https://blockstream.info/. Usually a link will generate so you can check from the wallet. CashApp doesn't charge you anything to transfer to another wallet.
You should be alerted by CashApp when the transaction is confirmed through the blockchain.
Boom you have bitcoin in your MD Wallet.
Here you can check the charts: https://www.tradingview.com/symbols/BTCUSD/
submitted by jeremyhunt1995 to BitcoinBeginners [link] [comments]

Choosing The Best Multi-Currency Wallet For Crypto in 2020

Crypto differs from fiat in terms of storage. It is saved not in some kind of virtual bank, but directly in the blockchain. The coins, information on the distribution of digital assets between users, transaction history – all this data is stored by the chain. Such data cannot be changed or erased in any way. And without a crypto wallet, you cannot manage your assets.

Let’s have a look at different types of crypto wallets.

A cryptocurrency wallet stores your “private” and “public” keys used to send and receive various crypto tokens. The interface and design of the programs help users to get all the necessary information about their digital savings.
There are two types of wallets:

How do cryptocurrency wallets work?

Cryptocurrency wallets are not designed to actually store digital assets; instead, they provide the tools necessary to interact with the blockchain network. The wallet includes a public address, which is an identifier in the form of a set of letters and numbers. This address is a kind of location on the blockchain where you can send coins. You can share your public address with another user to receive funds, but you should never show your private key to anyone.
A private key provides access to your cryptocurrencies, regardless of which wallet you use. Thus, even if your computer or smartphone was compromised, you can still access your funds from any other device, provided that you have the appropriate private key (or seed phrase).

Types of wallets

Web wallet

This type of wallet is suitable for beginners, since it does not require the purchase of devices, software installation, or downloading the blockchain. It is enough for the user to register on the site. Web wallets are simple and convenient to use, they do not take up space on the HDD and are constantly synchronized with the blockchain network, even when your computer is offline.
Cryptopay enables customers to transfer money directly between their Cryptopay wallet and SEPA (Single Euro Payments Area) bank account, store their funds safely in a multi-coin portfolio, protected by two-factor authentication to increase security.
Coinbase is a trading service that many retailers use to receive digital currencies from sales. Private keys are stored on the server, and client funds are stored on a cold wallet. You can enable two-factor authentication and install the smartphone app.

Desktop wallet

The local wallet is installed on the hard drive and loaded with the operating system. Such wallets are divided into “thick” (full-node clients) and “thin” (light-node clients). Thick ones can take up to hundreds of gigabytes of hard drive space. Thin local wallet is actually a program that makes requests to the blockchain through a trusted site.
Bitcoin Core is a Bitcoin wallet created by the Bitcoin Foundation. If you want to get a truly secure place for your digital assets, choose this thick desktop wallet.
Exodus is a universal thin crypto wallet. It supports 100+ altcoins and has a built-in exchange service. Also, Exodus can interact with the Trezor Crypto Hardware Wallet.

Mobile phone and browser wallets

Mobile wallets are available through special applications. You can use them for shopping in real stores where crypto is accepted – just like ApplePay.
Benefits of Mobile Wallets:
Disadvantages of mobile wallets:
Coinomi is a multi-currency application with two integrated exchange services (Shapeshift and Changelly). The wallet supports 100+ virtual coins, the keys are stored exclusively in the application.
Browser wallet is an extension for Chrome and Opera browsers. It is very easy to use: you just enter seed phrases and get access to the savings.
The Jaxx extension for Chrome from the team of developers of the browser wallet KryptoKit, supports not only Bitcoin, but Ethereum as well.

Hardware wallet

This is the most reliable option for saving virtual assets. They look like ordinary USB flash drives. The user inserts a USB, logs on a wallet program by entering a password and thus gets access to the funds. All operations are performed not in the system, but directly on the flash drive itself, which eliminates extraneous access to data.
Trezor wallet supports most of the top coins, it can be synchronized with the MyEtherWallet online wallet, as well as Chrome and Firefox browsers to get access to crypto funds.
Ledger Nano S is miniature, safe, and easy to use and has several levels of protection. Asset management is performed through the Ledger Manager utility.

Paper wallet

A paper wallet is a piece of paper that usually has QR codes that can be quickly scanned to get the address to a crypto account. The main advantage of services like BitAddress and Bitcoin Paper Wallet is that the keys are actually stored offline, which makes them immune to hacker attacks. The main drawback, however, is that the paper wallet can be stolen or lost.

Which wallet is the safest?

An offline crypto wallet is the most reliable one. You can install a local wallet on a PC that is not connected to the Internet and store your digital assets on it, but this is not very convenient if you need to quickly complete a transaction.

Conclusion

The choice depends on how you plan to use your tokens. Small amounts of crypto can be stored on thin local or Internet wallets, and for long-term storage of large amounts, it is better to get thick or hardware wallets. In any case, remember to strictly observe all security measures.
submitted by CoinjoyAssistant to u/CoinjoyAssistant [link] [comments]

Cash App - Why so hard to *spend* BTC?

I'm a big fan of Cash App and their support for BTC and prefer it over Conbase... but... it leaves a lot to be desired if you want to spend BTC directly from the app. The UI doesn't have a legit "spend" option and just has a "Withdrawal" button. Fine... but it gets worse. You have to manually choose how much you are going to withdrawal with a little slider... The last nail in the coffin is when I try to scan a QR code generated by BTC Pay Server. Nope, it is unable to read a basic QR code. Fail.
Oh sure, I know... "Just send it to a real wallet! Not your keys not your bitcoin!!!" and I agree, but for the average Joe Boomer that wants his discount from a vendor for paying with BTC, transferring $40 of BTC to a real wallet is just an annoying obstacle. And losing $40 means nothing to Joe. Convenience is everything.
It is also nice that Cash App "doesn't charge fees" so to speak. Yeah, I know Cash App makes their profit in the spread, but average Joe Boomer doesn't like seeing $40 + $10 transaction fee. It confuses them and they feel ripped off. They like to see $50 and "no fees".
We would see a lot more adoption if Cash App simply bridged this gap and added a "Pay" or "Spend" button with the ability to scan a payment request QR code. Until then it is just for people to speculatively invest in $20 of BTC. One step above Robinhood.
submitted by sonicode to Bitcoin [link] [comments]

Bitcoin shopping cart software

I've been designing websites for 10+ years, and just received a project request from a client to integrate a bitcoin shopping cart. I don't have much experience with bitcoin but was wondering if anyone can recommend bitcoin/crypto shopping cart software.

The client specifically mentioned a shopping cart that generates a bitcoin payment address along with a scannable QR code. Any and all recommendations would be appreciated.
submitted by CrawlFromCops to Bitcoin [link] [comments]

How to send to a QR code - YouTube 3D Printed Bitcoin QR Code Bitcoin-Transferencia de bitcoin por código Qr de ... How to Accept Bitcoin by Printing QR Code - YouTube How to see your bitcoin QR code - YouTube

According to a report, a Bitcoin-to-QR-code generators’ network has stolen over $45,000 from the users in the past four weeks.Instead of converting the Bitcoin address which was entered into the site to its equivalent QR code; the website generated the same QR code always for a fake wallet.Like the one which Denley discovered, eight other sites were performing the same activity and telling ... Bitcoin is the first decentralized peer-to-peer payment network that is powered by its users with no central authority or middlemen. What is a QR code? QR codes (quick response code) are made up of squares that are arranged inside a square grid usually on a white background for better contrast when scanning. These codes can be read by devices ... This makes it very inconvenient to have to enter manually by hand each time you need to send or request a payment. So by using our Bitcoin QR code maker that long address can be turned into a QR code ready to scan quickly and easily. Where can I get my Bitcoin address? Depending on the type of cryptocurrency wallet you have the way to obtain an address can be different for each one. If you don ... As of November 2013, Bitcoin-qt generates a QR code. Click the Addresses button at the top of the window, highlight the wallet address you want, and then click the "Show QR Code" button at the bottom of the window. Add a message, if you want, or not, and then click the "Save As" button. It will be saved as a PNG image file. Click on Request in the top of your wallet and select Bitcoin from the Currency drop-down menu. In the Receive To drop-down menu, choose the wallet that you want to receive bitcoin. Click Copy to copy the newly generated address to your clipboard and share with the sender OR click View QR Code so the sender can scan your address’ QR code directly from your phone.

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How to send to a QR code - YouTube

How to accept Bitcoin. No computers. Don't have to be an IT whiz. Just print out a piece of goshdarned paper. We used http://blockchain.info wallet in this v... This video shows you how to send digital currency using a QR code. This is a convenient way to pay using your Luno wallet, without the need to enter the reci... Transferencias de Bitcoin de un monedero virtual a otro en cuestión de segundos con el código QR. Puedes hacer lo mismo de un país a otro a costos muy pero m... Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.

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