“Hyperledger” is a blockchain consortium under The Linux Foundation. Currently there are at least 4 different implementations of blockchain frameworks under Hyperledger: Fabric (IBM) Corda (R3) Iroha Sawtooth Lake (Intel) In Fabric v0.6: All validation peers keep open connection to each other. You can submit your transaction to any of them, and this transaction will … Read more
Here are the important differences to consider when choosing between Hyperledger Fabric and Hyperledger Sawtooth: Permissioned/Permissionless Hyperledger Sawtooth supports both permissioned and permissionless blockchain networks. Sawtooth has a flexible approach using roles and permissions. Hyperledger Fabric supports only permissioned blockchain networks. Fabric has a prescriptive/well-defined approach through pluggable membership service providers (MSPs) that enables a … Read more
solidity ^0.8.0 import “@openzeppelin/contracts/utils/Strings.sol”; Strings.toString(myUINT) works for me. https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Strings.sol#L15-L35
This is a good question, though not one easily addressed with a simple answer. As @Mat0 commented above, one difference is the approaches that the various platforms are using to achieve consensus. Some use proof of work (PoW), others use variants of byzantine fault tolerant strategies (PBFT, SBFT, etc). Some use PAXOS derivative strategies. Hyperledger … Read more
From Solidity ^0.6.8 SPDX license is introduced. So you need to use SPDX-License-Identifier in the code. Have a look at this: https://forum.openzeppelin.com/t/solidity-0-6-8-introduces-spdx-license-identifiers/2859 For example in your code you need to use license identifier like // SPDX-License-Identifier: MIT pragma solidity ^0.7.5; contract TestContract { // Some logic } You need to use license according to your … Read more
You should add memory keyword for string parameter, which was introduced in solidity version 0.5.0 As per the documentation: Explicit data location for all variables of struct, array or mapping types is now mandatory. This is also applied to function parameters and return variables. For example, change uint[] x = m_x to uint[] storage x … Read more