JS - 0.9.67, makeExchangeTx (experimental, not final)

golos-lib-js/src/browser.js

@@ -4,6 +4,7 @@ const multiauth = require('./multiauth');
 const middlewares = require('./middlewares');
 const broadcast = require('./broadcast');
 const config = require('./config');
+const dex = require('./dex')
 const formatter = require('./formatter')(api);
 const memo = require('./auth/memo');
 const messages = require('./auth/messages');
@@ -21,6 +22,7 @@ const golos = {
     multiauth,
     broadcast,
     config,
+    dex,
     formatter,
     memo,
     messages,

golos-lib-js/src/dex/index.js

@@ -0,0 +1,59 @@
+import isFunction from 'lodash/isFunction'
+import { Asset, Price } from '../utils'
+
+const ORDER_MAX_EXPIRATION = 0xffffffff
+
+function makeOrderID() {
+    return Math.floor(Date.now() / 1000)
+}
+
+async function makeExchangeTx(exchangeSteps, opts) {
+    const defOpts = {
+        op_type: 'limit_order_create',
+        orderid: (op, i, ops, step) => {
+            return makeOrderID()
+        }
+    }
+    opts = {...defOpts, ...opts}
+
+    const ops = []
+    let i = 0
+    for (const step of exchangeSteps) {
+        const op = {}
+
+        const copyField = (key, defVal) => {
+            if (key in opts) {
+                if (opts[key] !== undefined) {
+                    op[key] = opts[key]
+                }
+            } else if (defVal !== undefined) {
+                op[key] = defVal
+            }
+        }
+
+        copyField('owner')
+        if ('orderid' in opts) op.orderid = opts.orderid
+
+        op.amount_to_sell = step.sell
+
+        const prc = await new Price(step.limit_price)
+        op.min_to_receive = Asset(step.sell).mul(prc).toString()
+
+        copyField('fill_or_kill', false)
+
+        op.expiration = opts.expiration || ORDER_MAX_EXPIRATION
+
+        if (isFunction(opts.orderid)) {
+            op.orderid = await opts.orderid(op, i++, ops, step)
+        }
+
+        ops.push([opts.op_type, op])
+    }
+    return ops
+}
+
+module.exports = {
+    ORDER_MAX_EXPIRATION,
+    makeOrderID,
+    makeExchangeTx,
+};

golos-lib-js/src/index.js

@@ -4,6 +4,7 @@ const multiauth = require('./multiauth');
 const middlewares = require('./middlewares');
 const broadcast = require('./broadcast');
 const formatter = require('./formatter')(api);
+const dex = require('./dex')
 const memo = require('./auth/memo');
 const messages = require('./auth/messages');
 const config = require('./config');
@@ -20,6 +21,7 @@ module.exports = {
     api,
     auth,
     broadcast,
+    dex,
     formatter,
     memo,
     messages,