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Cryptocurrency Ethereum Mastering Development

I need help with Ether Cards I received from my brother

I have set up an ether wallet and I have revealed the 12 word private key. Now what? How do I get the funds on the card into my wallet? Where do I input the private key words? I feel like this should be simple but I can’t figure it out. Help!

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Bitcoin Cryptocurrency Mastering Development

Anyone knows those companies?

I would like to know if anyone is familiar with columncapitalinc.com or advancedmarket-terminal.com . Has anyone ever done business with them ? I would really appreciate any feedback

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Bitcoin Cryptocurrency Mastering Development

Transaction taking a long time to confirm, now it doesn’t even show up on Bitcoin Explorer

So, I’m trying to spend a small amount of bitcoin on a website (not relevant) and I send over 0.0010346 BTC with a fee of 0.0000543 BTC ( 30.2 sat/byte ) and it’s been almost 24 hours, and it still hasn’t confirmed. The website stated it saw my payment, and will convert my BTC into […]

Categories
Bitcoin Cryptocurrency Mastering Development

Transaction taking a long time to confirm, now it doesn’t even show up on Bitcoin Explorer

So, I’m trying to spend a small amount of bitcoin on a website (not relevant) and I send over 0.0010346 BTC with a fee of 0.0000543 BTC ( 30.2 sat/byte ) and it’s been almost 24 hours, and it still hasn’t confirmed. The website stated it saw my payment, and will convert my BTC into […]

Categories
Cryptocurrency Ethereum Mastering Development

Gas price and limit with Truffle deployment in Ethereum

I am developing a smart contract in truffle. I’m having some trouble understanding how GAS works in Ethereum. I used the following parameters in my Rinkeby test net: gas limit: 4600000 gas price: 10000000000 (10Gwei) This means that the Gas limit is set at: 4600000 * 10000000000 ~ 0.046 ETH ~ 17 $ On the […]

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Bitcoin Cryptocurrency Mastering Development

How can the segwit witness data can be “off-chain”? What does it really mean?

I have several questions regarding the segwit witness data. My current understanding is as follows. Before segwit, the witness data was part of the input that the user had to provide so that they could spend an UTXO. The witness data is the digital signature or any other solution that allows an UTXO to be […]

Categories
Cryptocurrency Ethereum Mastering Development

Gas price and limit with Truffle deployment in Ethereum

I am developing a smart contract in truffle. I’m having some trouble understanding how GAS works in Ethereum. I used the following parameters in my Rinkeby test net: gas limit: 4600000 gas price: 10000000000 (10Gwei) This means that the Gas limit is set at: 4600000 * 10000000000 ~ 0.046 ETH ~ 17 $ On the […]

Categories
Cryptocurrency Ethereum Mastering Development

Messaging platform with public-private key pairs as identifier

Is there any platform available for Ethereum address 0x1d53.. to message 0xcc23…, and so on? It seems like there would be a lot of demand for something like that, which suggests it exists. Off-chain, I guess. I need it for the pairs in Pseudonym Pairs (source code) to agree on a random video channel over […]

Categories
Cryptocurrency Ethereum Mastering Development

Messaging platform with public-private key pairs as identifier

Is there any platform available for Ethereum address 0x1d53.. to message 0xcc23…, and so on? It seems like there would be a lot of demand for something like that, which suggests it exists. Off-chain, I guess. I need it for the pairs in Pseudonym Pairs (source code) to agree on a random video channel over […]

Categories
Bitcoin Cryptocurrency Mastering Development

Can a single wallet generate (and use) both SegWit and non-SegWit addresses?

Is a Segwit wallet able to generate and use non-Segwit addresses? I’m using Bitpay’s Bitcore to create wallets and generate new addresses for the users of my platform. I’m also using Bitcore-wallet-client to sign transactions. My users have legacy wallets right now. I intend to migrate their wallets to native Segwit, but they will also […]