Jose Storopoli storopoli

fn halts(program: A) -> bool

fn b(program: A) {
    if halts(A) {
        loop {}
    } else {
        return ();
    }
}

How to Create an Invoice just with a payment hash and amount

You can't do this in the CLI, the addinvoice requires a random 32-byte hex-encoded preimage. But you can do this with the REST API LND interface:

curl --insecure --request POST --data '{"r_hash": "<PAYMENT_HASH>", "value": <INT>}' --header "Grpc-Metadata-macaroon: <INVOICE MACAROON OR HIGHER>" --header "Content-Type: application/json" -v https://localhost:<LND_PORT>/v1/invoices

You need the --insecure flag since it is an https:// endpoint that we cannot validate the TLS certificate.

BDK PR Review Club - 2024-05-09

PR discussed: bitcoindevkit/bdk#1395

Why does BDK needs pseudorandom number generators (PRNG)? Particularly in signing and in building a transaction.
- Why when signing a tx?
  
  A: Because of nonces, even if you don't use a PRNG, you get deterministic nonce generated which depends

Spin the container: docker run --rm --name bitcoin jaonoctus/bitcoind:v26.0 -maxconnections=0
Use the bitcoin-cli from another terminal: docker exec -it bitcoin bitcoin-cli decoderawtransaction true

	# run me with:
	# flatpak-builder --force-clean --user --install-deps-from=flathub-verified --install builddir com.sparrowwallet.Sparrow.yml
	id: com.sparrowwallet.Sparrow
	branch: 2.0.0
	runtime: org.freedesktop.Platform
	runtime-version: '23.08'
	sdk: org.freedesktop.Sdk
	command: Sparrow
	modules:
	- name: Sparrow

	use std::pin::pin;
	use std::marker::PhantomPinned;

	#[derive(Debug)]
	struct MyStruct {
	field: u32,
	_pin: PhantomPinned
	}

	impl MyStruct {

	// In general there are two properties for traits to satisfy
	// in order them to be object-safe:
	//
	// 1. The return type isn’t Self.
	// 2. There are no generic type parameters.


	// Here's an example of a non-object-safe Trait
	trait MyTrait {
	fn f(&self) -> Self;

	[
	{
	"input_combination": [
	{
	"type": 1,
	"code": 58,
	"origin_hash": "748e31550c24fc009038438dc4fce338"
	}
	],
	"target_uinput": "keyboard",