I am new to block chain. Suddenly I got a question did we can able to access the previous block data from the Ethereum block chain by block number. For example
I setup hyperledger fabric network using amazon managed blockchain by following this guide. Everything works properly in the hyperledger network. Now I want to
I am new to bigchaindb and i have a question. In case a single company wants to store data as asset on bigchaindb and share it with other companies, what advant
I'm learning blockchain development recently and I'm implementing ERC721 contract to mint NFT and store the mapping of ownership. What if I deploy a second cont
I am learning solidity and got to know that interface and abstract are both classes that may contain unused functions. My doubt is: What is the difference betwe
I setup hyperledger fabric in amazon managed blockchain. I can get peer node logs, CA logs, chaincode logs. I do not know how to get orderer logs. That is requi
I am trying to setup hyperledger fabric blockchain network using amazon managed blockchain following this guide. In the step 6, to create the channel I have exe
I write the code below. It seems it has a problem with the "signed_txn = w3.eth.account.sign_transaction(transaction, private_key=private_key" part. I face to t
i couldnt find a way to get the history of transactions a certain Tron address is involved in i tried the tronweb API : https://api.trongrid.io/v1/accounts/TJmm
I am developing an application on Ethereum blockchain. I use Solidity for contract and Nethereum c# library to connect to the contract. I am somehow new in Ethe
I'm new in the blockchain community, and i have to realize a web 3.0 project. In this project, we have an ERC20, and for each user who sign up on our platform,
We are developing application on VS code with Ganache. So everything will be local as it is Ganache. As explained in following link, we cannot use etherScan fun
How do i Configure events on the amazon managed blockchain I have configured amazon managed blockchain setup with Hyperledger. The network is prepared with a s
What are the key differences between Amazon Managed Blockchain and Amazon QLDB ? Under which scenarios is it advisable to use which service for distributed led
I have setup Amazon Managed Blockchain using Hyperledger fabric. I am trying to send some transactions to the blockchain. How can I view performance for the b
I am getting invalid sender when trying to send a signed transaction. Here is the error: Uncaught (in promise) Error: Returned error: invalid sender and this i
I am developing NFT marketplace with terra and I use CW721. And I noticed on mint function if the sender and minter is not equal it returns "Unauthorized" error
How many requests can be accepted by Amazon Managed Blockchain service? Facing Too Many Requests error while creating channel. How can I fix it?
I am trying to connect Ganache local network to Metamask, using official documentation. However, it won't let connect without filling the currency symbol of the
QLDB seems to be this centralized extension built upon the Fabric orderer service that allows you to query a replication of the blockchain network in an SQL-lik
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