What is the point of using “Hodl Hodl” when the sellers have the same “verification” nonsense as all centralized marketplaces?

Example of the only offer on the site which I could in theory take, until reading this profile text: Please verify your identity with us so that we can trade safely No 3rd party transfers NEW clients (with me) : Please provide your phone number so that we can verify your identity with a third…

Version Compatibility Issues Solidity v0.4 to 0.5 | Identity Contracts ERC 725 | abi.encodePacked not working

This is in reference to ERC 725 Identity Contracts. I am updating the contract to version 0.5. The issue arise in a specific function where it requires a single argument to the call method which I have provided using abi.encodePacked but receiving the following error 2 arguments given but expected 1. This function requires a…

How to provide a proof-of-payment to an offline Lightning Network vending machine?

I’m considering building a Lightning Network vending machine that is offline but has the capability to create LN invoices and verify payments. As an example the scheme has: One offline vending machine. One online node to validate payments. One user (online with a cellphone). For that there must be: – A way for the vending…

Geth 1.9.11 (and JSON-RPC) are still using a old version of web3?

Geth console by default is using web3 0.20.1, even in the very last geth version (1.9.11). Is it possible to use web3 1.0+? { api: “0.20.1”, ethereum: “0x41”, network: “3”, node: “Geth/v1.9.12-unstable-2a5ed1a1-20200225/linux-amd64/go1.13.8”, whisper: undefined, getEthereum: function(callback), getNetwork: function(callback), getNode: function(callback), getWhisper: function(callback) }