add reduce TX

src/graphql/input-types/transaction.ts

@@ -20,3 +20,15 @@ export class SignedTransactionInput {
   @Field({ nullable: true })
   size?: number;
 }
+
+@InputType("ReduceTransaction")
+export class ReduceTransactionInput {
+  @Field(() => String)
+  unsignedTransaction!: string;
+
+  @Field(() => [String])
+  inputBoxes!: string[];
+
+  @Field(() => [String])
+  dataInputBoxes!: string[];
+}

src/graphql/resolvers/transaction-resolver.ts

@@ -1,10 +1,24 @@
 import { GraphQLResolveInfo } from "graphql";
-import { Args, ArgsType, Ctx, Field, Info, Int, Query, Resolver } from "type-graphql";
+import {
+  Arg,
+  Args,
+  ArgsType,
+  Ctx,
+  Field,
+  Info,
+  Int,
+  Mutation,
+  Query,
+  Resolver
+} from "type-graphql";
 import { Transaction } from "../objects/transaction";
 import { removeUndefined } from "../../utils";
 import { GraphQLContext } from "../context-type";
 import { PaginationArguments } from "./pagination-arguments";
 import { ArrayMaxSize } from "class-validator";
+import { ReduceTransactionInput } from "../input-types";
+import * as wasm from "ergo-lib-wasm-nodejs";
+import { nodeService } from "../../services";
 
 @ArgsType()
 class TransactionArguments {
@@ -72,4 +86,26 @@ export class TransactionResolver {
       take
     });
   }
+
+  @Mutation(() => String)
+  async reduceTransaction(@Arg("transaction") transaction: ReduceTransactionInput) {
+    try {
+      const tx = wasm.UnsignedTransaction.from_json(transaction.unsignedTransaction);
+      const ergoBoxes = wasm.ErgoBoxes.from_boxes_json(transaction.inputBoxes);
+      const dataInputBoxes = wasm.ErgoBoxes.from_boxes_json(transaction.dataInputBoxes);
+      const ctx = await nodeService.getStateContext();
+
+      const reducedTx = wasm.ReducedTransaction.from_unsigned_tx(
+        tx,
+        ergoBoxes,
+        dataInputBoxes,
+        ctx
+      );
+
+      return reducedTx.sigma_serialize_bytes().toString();
+    } catch (e: any) {
+      console.error(e);
+      throw new Error(`Failed to reduce transaction! ${e.message}`);
+    }
+  }
 }

src/graphql/schema.graphql

@@ -218,6 +218,7 @@ type Mempool {
 
 type Mutation {
   checkTransaction(signedTransaction: SignedTransaction!): String!
+  reduceTransaction(transaction: ReduceTransaction!): String!
   submitTransaction(signedTransaction: SignedTransaction!): String!
 }
 
@@ -235,6 +236,12 @@ type Query {
   transactions(address: String, addresses: [String!], headerId: String, inclusionHeight: Int, maxHeight: Int, minHeight: Int, skip: Int = 0, take: Int = 50, transactionId: String, transactionIds: [String!]): [Transaction!]!
 }
 
+input ReduceTransaction {
+  dataInputBoxes: [String!]!
+  inputBoxes: [String!]!
+  unsignedTransaction: String!
+}
+
 input Registers {
   R4: String
   R5: String