Selection of UTXO with Pending (non-mined) Transactions [duplicate]

Selection of UTXO with Pending (non-mined) Transactions [duplicate]

This question already has an answer here:

I have a theoretical question about Blockchain Wallet implementations.

Say wallet A has UTXO's for {50, 30} with ID's {0,1} and wants to send wallet B 2 separate payments of $40 each before any block containing the first transaction can be mined.

What is the protocol for handling this? What UTXOs will be referenced as inputs to each transaction? How can the 2nd transaction use the Output of the 1st as its Input if miners can mine any transactions irrespective of order?

There must be a selection criteria to avoid unintentional double-spending: simply checking the Blockchain for all UTXOs doesn't account for the latest pending transactions. It seems you must all check the pending transactions before validating any transaction or creating any transaction?

https://ift.tt/2LVgTZt

Comments

Post a Comment

Popular posts from this blog

Bitcoin Core errors with database block

Bitcoin Core errors with database block I've had the follow issue: on one machine I've launced Bitcoin Core v0.16.0 and Litecoin Core v0.16.0. Each application work in separate datadir also each application have setted callback call for event walletnotify . For now I use both application with testnets. Recently, there have been frequent cases when these applications stop sending transactions, when restarting, an error occurs: "Corrupted block database detected. Do you whant to rebuild the block database now ?". It happens on both apps Bitcoin Core and Litecoin Core, after rebuild applications continue to work, but after a while it happens again Please help me, what I doing wrong? Thank you for any advice https://ift.tt/2z6j9rL
Read more

Bitfinex & Market Synergy To Offer Institutional Calibre Cryptocurrency Connectivity

Bitfinex & Market Synergy To Offer Institutional Calibre Cryptocurrency Connectivity Market Synergy GmbH , a Swiss-based organisation which offers institutional cryptocurrency connectivity and security for banks, brokers and hedge funds has been selected by  Bitfinex  to provide robust, high performance connectivity for institutional clients. Market Synergy has designed and built a bespoke network for Bitfinex, hosted in a Swiss data centre in the heart of Crypto Valley. In addition to providing outsourced connectivity and hosting services to Bitfinex, Market Synergy can also manage co-location services for Bitfinex’s institutional clients and offer a FIX feed and ISP link to the digital asset gateway which Bitfinex recently launched in collaboration with Connamara . Market Synergy is a separate company within the FXecosystem Group , which also comprises of FXecosystem and Bondecosystem, both of which are institutional market leaders in outsourced connectivity in their r
Read more