fix(interop): support Conway pparams mapping to u5c (#509)

pallas-utxorpc/src/params.rs

@@ -144,7 +144,59 @@ impl<C: LedgerContext> Mapper<C> {
                 max_block_header_size: params.max_header_size,
                 ..Default::default()
             },
-
+            MultiEraProtocolParameters::Conway(params) => u5c::PParams {
+                max_tx_size: params.max_transaction_size.into(),
+                max_block_body_size: params.max_block_body_size.into(),
+                max_block_header_size: params.max_block_header_size.into(),
+                min_fee_coefficient: params.minfee_a.into(),
+                min_fee_constant: params.minfee_b.into(),
+                coins_per_utxo_byte: params.ada_per_utxo_byte,
+                stake_key_deposit: params.key_deposit,
+                pool_deposit: params.pool_deposit,
+                desired_number_of_pools: params.desired_number_of_stake_pools.into(),
+                pool_influence: Some(u5c::RationalNumber {
+                    numerator: params.pool_pledge_influence.numerator as i32,
+                    denominator: params.pool_pledge_influence.denominator as u32,
+                }),
+                monetary_expansion: u5c::RationalNumber {
+                    numerator: params.expansion_rate.numerator as i32,
+                    denominator: params.expansion_rate.denominator as u32,
+                }
+                .into(),
+                treasury_expansion: Some(u5c::RationalNumber {
+                    numerator: params.treasury_growth_rate.numerator as i32,
+                    denominator: params.treasury_growth_rate.denominator as u32,
+                }),
+                min_pool_cost: params.min_pool_cost,
+                protocol_version: u5c::ProtocolVersion {
+                    major: params.protocol_version.0 as u32,
+                    minor: params.protocol_version.1 as u32,
+                }
+                .into(),
+                max_value_size: params.max_value_size.into(),
+                collateral_percentage: params.collateral_percentage.into(),
+                max_collateral_inputs: params.max_collateral_inputs.into(),
+                max_execution_units_per_transaction: Some(u5c::ExUnits {
+                    memory: params.max_tx_ex_units.mem,
+                    steps: params.max_tx_ex_units.steps,
+                }),
+                max_execution_units_per_block: Some(u5c::ExUnits {
+                    memory: params.max_block_ex_units.mem,
+                    steps: params.max_block_ex_units.steps,
+                }),
+                cost_models: u5c::CostModels {
+                    plutus_v1: params
+                        .cost_models_for_script_languages
+                        .plutus_v1
+                        .map(|values| u5c::CostModel { values }),
+                    plutus_v2: params
+                        .cost_models_for_script_languages
+                        .plutus_v2
+                        .map(|values| u5c::CostModel { values }),
+                }
+                .into(),
+                ..Default::default()
+            },
             _ => unimplemented!(),
         }
     }