src/web3/cid.rs

use crate::errors::AppError;
use cid::Cid;
use sha2::{Digest, Sha256};

pub fn generate_cid(data: impl AsRef<[u8]>) -> Result<String, AppError> {
    let digest = Sha256::digest(data.as_ref());
    let mh = cid::multihash::Multihash::wrap(0x12, &digest)
        .map_err(|e| AppError::Other(anyhow::anyhow!("invalid multihash: {:?}", e)))?;
    let cid = Cid::new_v1(0x55, mh);
    Ok(cid.to_string())
}