Converting a vector<u8> to a u256 in Move

[StrawberryChocolateFudge]

Hello

I am looking to convert vector to a u256 in Move.

I am looking to do the equivalent of bytesToBigIntLE from "@aptos-labs/ts-sdk" but in Move.

I am hashing an address with blake2b_256 and I want to convert the resulting vector into an integer.
I can do it in javascript with BigInt and the mentioned ts-sdk funcitons, but I would like to do the same in Move.

How do I convert a 32 byte vector to a u256 ?

[StrawberryChocolateFudge]

I solved it in a way I guess, but I still want to know if there are other more idiomatic ways to do it.

So I have a vector in Move and a Buffer in javascript, I can verify they contain the same bytes. Its the output of blake2b-wasm and aptos_hash:blake2b_256 both hashing an address converted with bcs::to_bytes.

so to convert it to an integer that is the same on both sides, I had to do it manually:

In Move I break up the vector into individual bytes and cast them to u256, then add them together with bit shifting with little endian ordering.

 let myInt_le: u256 =
            byte0 + (byte1 << 8) + (byte2 << 16) + (byte3 << 24) + (byte4 << 32) ....
etc...

And I did the same in Javascript but casting the bytes of the buffer to BigInt:
BigInt(byte[0]) + (BigInt(byte[1]) << 8n) + (BigInt(byte[2]) << 16n) ......

This was the only way I could get the same integer from a vector and Buffer consistently both in Move and Javascript.