import { BigNum } from "https://deno.land/x/lucid@0.10.10/src/core/libs/cardano_multiplatform_lib/cardano_multiplatform_lib.generated.js";
returns 0 if it would otherwise underflow
x/lucid/src/core/libs/cardano_multiplatform_lib/cardano_multiplatform_lib.generated.js>BigNum#clamped_sub
import { BigNum } from "https://deno.land/x/lucid@0.10.10/src/core/libs/cardano_multiplatform_lib/cardano_multiplatform_lib.generated.js";
returns 0 if it would otherwise underflow