added calculate_fee, estimated_tx_network_fee, estimate_rct_tx_size bridge fns

index.js

@@ -38,6 +38,7 @@ mymonero_core_js.monero_sendingFunds_utils = require("./monero_utils/monero_send
 mymonero_core_js.monero_requestURI_utils = require("./monero_utils/monero_requestURI_utils");
 mymonero_core_js.monero_keyImage_cache_utils = require("./monero_utils/monero_keyImage_cache_utils");
 mymonero_core_js.monero_paymentID_utils = require("./monero_utils/monero_paymentID_utils");
+mymonero_core_js.monero_amount_format_utils = require("./monero_utils/monero_amount_format_utils");
 mymonero_core_js.api_response_parser_utils = require("./hostAPI/response_parser_utils");
 //
 mymonero_core_js.nettype_utils = require("./cryptonote_utils/nettype");

monero_utils/MyMoneroCoreBridge.js

@@ -309,6 +309,56 @@ class MyMoneroCoreBridge
 		return ret.retVal;
 	}
 
+	estimate_rct_tx_size(n_inputs, mixin, n_outputs, optl__extra_size, optl__bulletproof)
+	{
+		const args =
+		{
+			n_inputs: "" + n_inputs, 
+			mixin: "" + mixin, 
+			n_outputs: "" + n_outputs, 
+			extra_size: "" + (typeof optl__extra_size !== 'undefined' && optl__extra_size ? optl__extra_size : 0), 
+			bulletproof: "" + (optl__bulletproof == true ? true : false) /* if undefined, false */,
+		};
+		const args_str = JSON.stringify(args);
+		const ret_string = this.Module.estimate_rct_tx_size(args_str);
+		const ret = JSON.parse(ret_string);
+		if (typeof ret.err_msg !== 'undefined' && ret.err_msg) {
+			return { err_msg: ret.err_msg } // TODO: maybe return this somehow
+		}
+		return parseInt(ret.retVal); // small enough to parse
+	}
+	calculate_fee(fee_per_kb__string, num_bytes, fee_multiplier)
+	{
+		const args =
+		{
+			fee_per_kb: fee_per_kb__string,
+			num_bytes: "" + num_bytes,
+			fee_multiplier: "" + fee_multiplier
+		};
+		const args_str = JSON.stringify(args);
+		const ret_string = this.Module.calculate_fee(args_str);
+		const ret = JSON.parse(ret_string);
+		if (typeof ret.err_msg !== 'undefined' && ret.err_msg) {
+			return { err_msg: ret.err_msg } // TODO: maybe return this somehow
+		}
+		return ret.retVal; // this is a string - pass it to new JSBigInt(…)
+	}
+	estimated_tx_network_fee(fee_per_kb__string, priority)
+	{
+		const args =
+		{
+			fee_per_kb: fee_per_kb__string, 
+			priority: "" + priority,
+		};
+		const args_str = JSON.stringify(args);
+		const ret_string = this.Module.estimated_tx_network_fee(args_str);
+		const ret = JSON.parse(ret_string);
+		if (typeof ret.err_msg !== 'undefined' && ret.err_msg) {
+			return { err_msg: ret.err_msg } // TODO: maybe return this somehow
+		}
+		return ret.retVal; // this is a string - pass it to new JSBigInt(…)
+	}
+
 	create_signed_transaction(
 		from_address_string,
 		sec_keys,

monero_utils/__bridged_fns_spec.js

@@ -42,6 +42,9 @@ exports.bridgedFn_names =
 	"seed_and_keys_from_mnemonic",
 	"validate_components_for_login",
 	"generate_key_image",
+	"estimate_rct_tx_size",
+	"calculate_fee",
+	"estimated_tx_network_fee",
 	"create_signed_transaction",
 	"create_signed_transaction__nonIPCsafe"
 ];

tests/MyMoneroCoreCpp.node.js

@@ -32,6 +32,7 @@ console.time("Load module")
 async function tests()
 {
 	const monero_utils = await require("../monero_utils/monero_utils")
+
 	const Module = monero_utils.Module;
 
 	console.timeEnd("Load module")

tests/index.node.js

@@ -22,5 +22,41 @@ async function t1()
 	} catch (e) {
 		console.log(e)
 	}
+
+
+	try {
+		var tx_size = (await mymonero.monero_utils_promise).estimate_rct_tx_size(
+			2, // inputs 
+			6, 
+			2, // outputs
+			0, //optl__extra_size, 
+			false // optl__bulletproof
+		);
+		console.log("estimate_rct_tx_size", tx_size)
+	} catch (e) {
+		console.log(e)
+	}
+
+	try {
+		var fee = new mymonero.JSBigInt((await mymonero.monero_utils_promise).calculate_fee(
+			"9000000", 13762, 4
+			// fee_per_kb__string, num_bytes, fee_multiplier
+		));
+		console.log("calculate_fee", mymonero.monero_amount_format_utils.formatMoneyFull(fee), "XMR")
+	} catch (e) {
+		console.log(e)
+	}
+
+	try {
+		var fee = new mymonero.JSBigInt((await mymonero.monero_utils_promise).estimated_tx_network_fee(
+			"9000000", 2
+			// fee_per_kb__string, priority
+		));
+		console.log("estimated_tx_network_fee", mymonero.monero_amount_format_utils.formatMoneyFull(fee), "XMR")
+	} catch (e) {
+		console.log(e)
+	}
+
+
 }
 t1()