Its actually more of a donation thing. Im not really selling anything.
What are the donations going to?
Topic: Is it still possible to double spend? (Read 1911 times)
What are the donations going to?
You can have double-spending only if :
- the seller use a node server with no others nodes connected
- the buyer use ... the same node server
- the transaction is OK for both party with 0 confirmation
It's impossible.
In real life networking, you have 6-9 nodes to sprend the transaction ...
- the seller use a node server with no others nodes connected
- the buyer use ... the same node server
- the transaction is OK for both party with 0 confirmation
It's impossible.
In real life networking, you have 6-9 nodes to sprend the transaction ...
So its safe for me to accept 0 confirmations?
All reputable businesses will use 1. You don't truly have the coins until at least 1 confirmation.
Don't pull a Mt.Gox and leave yourself open with loose code. Protect yourself.
Uh.... ** Bitpay ** does zero-confirmation transactions. The dubious emphasis on confirmations is part of what kills the appeal of using bitcoin. This is not some scamcoin with a dead network. A simple code to do input analysis on a widely broadcast transaction and you are fine to accept 0 confirmations.
An easy solution to the OP's problem would be to process payments to charities in batches with the payment going out 1 day after payment is received
This sounds good. Confirm instantly (0 confirmations needed) and lets those receiving the donation wait a little longer (e.g. 6 confirmations). This gives those donating the good feeling instantly and those receiving the donation can probably wait an hour or two before they withdraw their money. Its FREE money I doubt anyone is going to get impatient about it.
This is true! Just write in T&C that they can only withdraw after 6 confirmations! As this is free money for them they don't have the right to bitch about it! Only if they want to empty your wallet with double spend... so I guess 6 confirmations for withdrawing is perfect! As they can't say they have an emergency and they stay on the net to ask people for money! You call people for that and say I will pay back as soon as people will donate to me!
Its actually more of a donation thing. Im not really selling anything.
What's the point of double spending a donation?Accept incoming donations with zero confirmations.
Only pay out to charities anything above 2 or more confirmations.
-snip-
Uh.... ** Bitpay ** does zero-confirmation transactions. The dubious emphasis on confirmations is part of what kills the appeal of using bitcoin. This is not some scamcoin with a dead network. A simple code to do input analysis on a widely broadcast transaction and you are fine to accept 0 confirmations.
Uh.... ** Bitpay ** does zero-confirmation transactions. The dubious emphasis on confirmations is part of what kills the appeal of using bitcoin. This is not some scamcoin with a dead network. A simple code to do input analysis on a widely broadcast transaction and you are fine to accept 0 confirmations.
Which is fine for a company like bitpay that can have multiple nodes online to test how good the propagation of the TX is and keep rebroadcasting it, but a little site (no offense nahtnam) thats accepting donations this might be a little to much to ask for.
-snip-
Will do. I think ill stick with 0 confirmations and add some sort of mechanism that verifies everything before withdrawing.
Will do. I think ill stick with 0 confirmations and add some sort of mechanism that verifies everything before withdrawing.
This sounds good. Confirm instantly (0 confirmations needed) and lets those receiving the donation wait a little longer (e.g. 6 confirmations). This gives those donating the good feeling instantly and those receiving the donation can probably wait an hour or two before they withdraw their money. Its FREE money I doubt anyone is going to get impatient about it.
You can have double-spending only if :
- the seller use a node server with no others nodes connected
- the buyer use ... the same node server
- the transaction is OK for both party with 0 confirmation
It's impossible.
In real life networking, you have 6-9 nodes to sprend the transaction ...
- the seller use a node server with no others nodes connected
- the buyer use ... the same node server
- the transaction is OK for both party with 0 confirmation
It's impossible.
In real life networking, you have 6-9 nodes to sprend the transaction ...
So its safe for me to accept 0 confirmations?
All reputable businesses will use 1. You don't truly have the coins until at least 1 confirmation.
Don't pull a Mt.Gox and leave yourself open with loose code. Protect yourself.
Uh.... ** Bitpay ** does zero-confirmation transactions. The dubious emphasis on confirmations is part of what kills the appeal of using bitcoin. This is not some scamcoin with a dead network. A simple code to do input analysis on a widely broadcast transaction and you are fine to accept 0 confirmations.
Its actually more of a donation thing. Im not really selling anything.
What's the point of double spending a donation?IDK. Maybe the creator of the project wants to forge donations on my site and withdraws?
No, its a site that allows other people to accept donations in bitcoins.
Nice idea you have .... let us know when the site is ready ... I would like to try it
Will do. I think ill stick with 0 confirmations and add some sort of mechanism that verifies everything before withdrawing.
Its actually more of a donation thing. Im not really selling anything.
What's the point of double spending a donation?IDK. Maybe the creator of the project wants to forge donations on my site and withdraws?
No, its a site that allows other people to accept donations in bitcoins.
Nice idea you have .... let us know when the site is ready ... I would like to try it
Its actually more of a donation thing. Im not really selling anything.
What's the point of double spending a donation?IDK. Maybe the creator of the project wants to forge donations on my site and withdraws?
No, its a site that allows other people to accept donations in bitcoins.
Its actually more of a donation thing. Im not really selling anything.
What's the point of double spending a donation?IDK. Maybe the creator of the project wants to forge donations on my site and withdraws?
So as I see, more safely will be use 1 confirmation when using BTC pamyment on sites?
Its actually more of a donation thing. Im not really selling anything.
What's the point of double spending a donation?IDK. Maybe the creator of the project wants to forge donations on my site and withdraws?
So its safe for me to accept 0 confirmations?
yes if :
- you use a "hardware wallet" ... not a virtual wallet (like blockchain.info or coinbase).
- you're connected to a mobile internet connexion and not the free wifi of the owner.
the 1st point is at minimum 6 nodes to emit the transaction.
the 2nd point is a basic and can view in the "monitor network" on android bitcoin wallet for example ... if you have only 1 node, you have a problem and your connexion can be compromised.
I use the blockchain.info site to check for at least 1-2 confirmations.
Its actually more of a donation thing. Im not really selling anything.
What's the point of double spending a donation?
You can make it as many confirmations as you want (6 is considered safe).
However, since it's online you can 0 confirmations for the user. The frontend can accept the transaction once it's broadcasted (0 confirmations) while you can hold onto the product for as many confirmations as you'd like. You can contact the user if the transaction is not legitimate. Other than that, it's just waiting an hour to ship the product.
If it's a digital good, you could still wait the hour or so to send the email (or in 10 min after 1 confirmation) to download.
However, since it's online you can 0 confirmations for the user. The frontend can accept the transaction once it's broadcasted (0 confirmations) while you can hold onto the product for as many confirmations as you'd like. You can contact the user if the transaction is not legitimate. Other than that, it's just waiting an hour to ship the product.
If it's a digital good, you could still wait the hour or so to send the email (or in 10 min after 1 confirmation) to download.
legendary
Activity: 1862
Merit: 1011
Reverse engineer from time to time
I think you should wait for 1, unfortunately. There have been various accidents that can happen because of 0 conf.
You can have double-spending only if :
- the seller use a node server with no others nodes connected
- the buyer use ... the same node server
- the transaction is OK for both party with 0 confirmation
It's impossible.
In real life networking, you have 6-9 nodes to sprend the transaction ...
- the seller use a node server with no others nodes connected
- the buyer use ... the same node server
- the transaction is OK for both party with 0 confirmation
It's impossible.
In real life networking, you have 6-9 nodes to sprend the transaction ...
So its safe for me to accept 0 confirmations?
Wair for 1 to be safe.
Meuh6879 is missing some points, but since its for a donation 0 conf are fine.
You can have double-spending only if :
- the seller use a node server with no others nodes connected
- the buyer use ... the same node server
- the transaction is OK for both party with 0 confirmation
It's impossible.
In real life networking, you have 6-9 nodes to sprend the transaction ...
- the seller use a node server with no others nodes connected
- the buyer use ... the same node server
- the transaction is OK for both party with 0 confirmation
It's impossible.
In real life networking, you have 6-9 nodes to sprend the transaction ...
So its safe for me to accept 0 confirmations?
Wair for 1 to be safe.
Its actually more of a donation thing. Im not really selling anything.
If you are accepting donations then it really should not matter if someone double spends a transaction sent to you (nor would they have any reason to do so in the first place). Jump to: