Method ensure_unique

fendermint/testing/materializer/src/validation.rs:85–97

Ensure we aren't reusing references.

(
        &mut self,
        subnet: &SubnetName,
        reference: Option<ResourceHash>,
    )

    /// Ensure we aren't reusing references.
    fn ensure_unique(
        &mut self,
        subnet: &SubnetName,
        reference: Option<ResourceHash>,
    ) -> anyhow::Result<()> {
        if let Some(r) = reference {
            let rs = self.references.entry(subnet.clone()).or_default();
            if !rs.insert(r) {
                bail!("a reference is reused in {subnet:?}");
            }
        }
        Ok(())
    }

    /// Check that an account has a positive balance on a subnet
    fn ensure_balance(&self, subnet: &SubnetName, account: &AccountName) -> anyhow::Result<()> {