Add reveal to commitment and bivarcommitment

src/poly.rs

@@ -513,6 +513,11 @@ impl Commitment {
         let len = self.coeff.len() - zeros;
         self.coeff.truncate(len)
     }
+
+    /// Generates a non-redacted debug string
+    pub fn reveal(&self) -> String {
+        format!("Commitment {{ coeff: {:?} }}", self.coeff)
+    }
 }
 
 /// A symmetric bivariate polynomial in the prime field.
@@ -729,6 +734,16 @@ impl BivarCommitment {
     fn powers<T: IntoFr>(&self, x: T) -> Vec<Fr> {
         powers(x, self.degree)
     }
+
+    /// Generates a non-redacted debug string. This method differs from the
+    /// `Debug` implementation in that it *does* leak the the struct's
+    /// internal state.
+    pub fn reveal(&self) -> String {
+        format!(
+            "BivarCommitment {{ degree: {}, coeff: {:?} }}",
+            self.degree, self.coeff
+        )
+    }
 }
 
 /// Returns the `0`-th to `degree`-th power of `x`.