transactions

Here’s how to send raw transaction BTC using Bitcoin-cli command

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Yet another simpler way with some extra fundrawtransaction. Docs say us what inputs and output all required fields. But don’t forget empty list is object too: Step 1) $ bitcoin-cli createrawtransaction ‘[]’ \ ‘{“mxh3H416KCRoBDiweSESew5YJyAk1nxLrN”: 0.025}’ Step 2) $ bitcoin-cli fundrawtransaction <hex_createrawtransaction> \ ‘{“changeAddress”: “mkrzDhhZtzQm8zgckSs4fMNrvtNJ66zaFe”}’ After second step you can look at the fee generated by … Read more

Are Erlang/OTP messages reliable? Can messages be duplicated?

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I’ll separate this into points I hope will make sense. I might be re-hashing a bit of what I have written in The Hitchhiker’s Guide to Concurrency. You might want to read that one to get details on the rationale behind the way message passing is done in Erlang. 1. Message transmission Message passing in … Read more

2PC vs Sagas (distributed transactions)

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In my understanding (not a big user of 2PC since I consider it limiting): Typically, 2PC is for immediate transactions. Typically, Sagas are for long running transactions. Use cases are obvious afterwards: 2PC can allow you to commit the whole transaction in a request or so, spanning this request across systems and networks. Assuming each … Read more

Node.js 7 how to use sequelize transaction with async / await?

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let transaction; try { // get transaction transaction = await sequelize.transaction(); // step 1 await Model.destroy({ where: {id}, transaction }); // step 2 await Model.create({}, { transaction }); // step 3 await Model.update({}, { where: { id }, transaction }); // commit await transaction.commit(); } catch (err) { // Rollback transaction only if the transaction … Read more

Transactions in NoSQL?

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Generally speaking, NoSQL solutions have lighter weight transactional semantics than relational databases, but still have facilities for atomic operations at some level. Generally, the ones which do master-master replication provide less in the way of consistency, and more availability. So one should choose the right tool for the right problem. Many offer transactions at the … Read more

Is there an API to get bank transaction and bank balance? [closed]

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Just a helpful hint, there is a company called Yodlee.com who provides this data. They do charge for the API. Companies like Mint.com use this API to gather bank and financial account data. Also, checkout https://plaid.com/, they are a similar company Yodlee.com and provide both authentication API for several banks and REST-based transaction fetching endpoints.

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