Bitcoin UTXO anatomy

I’ve been using a command line tool to fetch spendables from a Bitcoin address. Given an address the following command (source) ouptuts UTXOs the address can spend. tx -i 1A3cbxFC4zrfgxEb6GhAe97m2rSEyvUetp > 4db2ddb59e0cd123d8d0715da9dddbe6b2697c5a1d83163cc049dcc152d1f7ed/0/76a9146337aefd82e6c1f83ab505b78c3bcc413b49364088ac/1061/0/0/0 The format is address/utxo index/script hash/… However I do not know what the last 4 elements mean, I’m guessing amount, but don’t know…

I’m super new to all this Ethereum stuff. Can anyone suggest me a place to learn how it works?

I’ve been tasked with writing a blockchain-based application (probably written in JS) that can be used to certify documents. I’ve done some research into where I can get stuff hosted (Infura looks the best right now). Can anyone suggest me a place to learn all about Ethereum/blockchain? And where would I start with the creation…

ParserError: Expected token Semicolon got ‘Return’

The error pops up whenever I try to compile through truffle, not able to figure out a solution any help is highly appreciated. Here is the error Compiling your contracts… =========================== > Compiling ./contracts/Migrations.sol > Compiling ./contracts/OraclizeTest.sol Error: CompileError: /root/Latest->querytransaction Working GOLD/oraclize-test/contracts/OraclizeTest.sol:36:9: ParserError: Expected token Semicolon got ‘Return’ return true; ^ Here is the solidity…

Gas required exceedes allowance when invoking a pure function

So, I got a problem when interacting with a smart contract in geth. I have this very simple contract: pragma solidity^0.6.1; contract Simple{ uint256 public number = 1; constructor() public { } function setNumber(uint256 another) public { number = another; } function getNumber() public view returns (uint256){ return number; } function add(uint256 x, uint256 y)…

Migrating 2 contracts in one Contract.sol script using ‘truffle migrate’

I have 2 contracts in 1 .sol file and when I run ‘truffle migrate’, it tells me that it has deployed 1 of the contracts and given me an additional error: Blockquote Invalid number of parameters for “undefined”. Got 0 expected 4! Here is my 2_intitail_migration.js file const AuctionBox = artifacts.require(“AuctionBox”); const Auction = artifacts.require(“Auction”);…

Migrating 2 contracts in one Contract.sol script using ‘truffle migrate’

I have 2 contracts in 1 .sol file and when I run ‘truffle migrate’, it tells me that it has deployed 1 of the contracts and given me an additional error: Blockquote Invalid number of parameters for “undefined”. Got 0 expected 4! Here is my 2_intitail_migration.js file const AuctionBox = artifacts.require(“AuctionBox”); const Auction = artifacts.require(“Auction”);…