fix(orchestration): add more user friendly error when a commitment can't be found with the correct state variable id

Author: lydiagarms

src/boilerplate/orchestration/javascript/raw/boilerplate-generator.ts

@@ -43,6 +43,9 @@ class BoilerplateGenerator {
           ${stateVarIds.join('\n')}
           \nlet ${stateName}_commitmentExists = true;
           \nconst ${stateName}_commitment = await getCurrentWholeCommitment(${stateName}_stateVarId);
+          \nif (!${stateName}_commitment) {
+          \n\tthrow new Error('Unable to find a non-nullified ${stateName} commitment with state id ' + ${stateName}_stateVarId + '.');
+          \n}
           \nconst ${stateName}_preimage = ${stateName}_commitment.preimage;
           \nconst ${stateName} = generalise(${stateName}_preimage.value);`];
         default: