please I need help, am using Bitcore-lib in my project and am having issues sending BTC, let’s assume I have addresses A, B, C, D, E & F and they have A = 0.2BTC, B = 0.13BTC, C = 0.25BTC, D = 0.0015BTC & E = 0.36BTC and I want to send the sum of BTC in A, B, C, D & E to F at once. Please can anyone help me on how to do that in node js?
First, it is worth noting that the bitcoin network does not have any notion of ‘account balances’ at the protocol level, this is an abstraction used by wallets for convenience.
Bitcoin uses UTXOs, and it is possible for multiple UTXOs to exist at the same address.
In your case, you can spend all of the UTXOs at the addresses you’ve listed in a single transaction, your wallet software will simply need to consume the relevant UTXOs as inputs, spending the coins to new outputs (creating new UTXOs).
Whether the coins exist at one address, or many, is irrelevant in your ability to spend the coins. A bitcoin transaction can have many inputs, and many outputs, if you so desire. Note that in general, the larger the number of inputs/outputs, the larger the vbyte size of the transaction will be, and thus the higher the fees will be.