1 files changed, 82 insertions, 0 deletions
diff --git a/packages/website/ts/local_storage/trade_history_storage.tsx b/packages/website/ts/local_storage/trade_history_storage.tsx
new file mode 100644
index 000000000..415b380b7
--- /dev/null
+++ b/packages/website/ts/local_storage/trade_history_storage.tsx
@@ -0,0 +1,82 @@
+import * as _ from 'lodash';
+import {Fill} from 'ts/types';
+import {configs} from 'ts/utils/configs';
+import {constants} from 'ts/utils/constants';
+import {localStorage} from 'ts/local_storage/local_storage';
+import ethUtil = require('ethereumjs-util');
+import BigNumber from 'bignumber.js';
+
+const FILLS_KEY = 'fills';
+const FILLS_LATEST_BLOCK = 'fillsLatestBlock';
+const FILL_CLEAR_KEY = 'lastClearFillDate';
+
+export const tradeHistoryStorage = {
+    // Clear all fill related localStorage if we've updated the config variable in an update
+    // that introduced a backward incompatible change requiring the user to re-fetch the fills from
+    // the blockchain
+    clearIfRequired() {
+        const lastClearFillDate = localStorage.getItemIfExists(FILL_CLEAR_KEY);
+        if (lastClearFillDate !== configs.lastLocalStorageFillClearanceDate) {
+            const localStorageKeys = localStorage.getAllKeys();
+            _.each(localStorageKeys, key => {
+                if (_.startsWith(key, `${FILLS_KEY}-`) || _.startsWith(key, `${FILLS_LATEST_BLOCK}-`)) {
+                    localStorage.removeItem(key);
+                }
+            });
+        }
+        localStorage.setItem(FILL_CLEAR_KEY, configs.lastLocalStorageFillClearanceDate);
+    },
+    addFillToUser(userAddress: string, networkId: number, fill: Fill) {
+        const fillsByHash = this.getUserFillsByHash(userAddress, networkId);
+        const fillHash = this._getFillHash(fill);
+        const doesFillExist = !_.isUndefined(fillsByHash[fillHash]);
+        if (doesFillExist) {
+            return;
+        }
+        fillsByHash[fillHash] = fill;
+        const userFillsJSONString = JSON.stringify(fillsByHash);
+        const userFillsKey = this._getUserFillsKey(userAddress, networkId);
+        localStorage.setItem(userFillsKey, userFillsJSONString);
+    },
+    getUserFillsByHash(userAddress: string, networkId: number): {[fillHash: string]: Fill} {
+        const userFillsKey = this._getUserFillsKey(userAddress, networkId);
+        const userFillsJSONString = localStorage.getItemIfExists(userFillsKey);
+        if (_.isEmpty(userFillsJSONString)) {
+            return {};
+        }
+        const userFillsByHash = JSON.parse(userFillsJSONString);
+        _.each(userFillsByHash, (fill, hash) => {
+          fill.paidMakerFee = new BigNumber(fill.paidMakerFee);
+          fill.paidTakerFee = new BigNumber(fill.paidTakerFee);
+          fill.filledTakerTokenAmount = new BigNumber(fill.filledTakerTokenAmount);
+          fill.filledMakerTokenAmount = new BigNumber(fill.filledMakerTokenAmount);
+        });
+        return userFillsByHash;
+    },
+    getFillsLatestBlock(userAddress: string, networkId: number): number {
+        const userFillsLatestBlockKey = this._getFillsLatestBlockKey(userAddress, networkId);
+        const blockNumberStr = localStorage.getItemIfExists(userFillsLatestBlockKey);
+        if (_.isEmpty(blockNumberStr)) {
+            return constants.GENESIS_ORDER_BLOCK_BY_NETWORK_ID[networkId];
+        }
+        const blockNumber = _.parseInt(blockNumberStr);
+        return blockNumber;
+    },
+    setFillsLatestBlock(userAddress: string, networkId: number, blockNumber: number) {
+        const userFillsLatestBlockKey = this._getFillsLatestBlockKey(userAddress, networkId);
+        localStorage.setItem(userFillsLatestBlockKey, `${blockNumber}`);
+    },
+    _getUserFillsKey(userAddress: string, networkId: number) {
+        const userFillsKey = `${FILLS_KEY}-${userAddress}-${networkId}`;
+        return userFillsKey;
+    },
+    _getFillsLatestBlockKey(userAddress: string, networkId: number) {
+        const userFillsLatestBlockKey = `${FILLS_LATEST_BLOCK}-${userAddress}-${networkId}`;
+        return userFillsLatestBlockKey;
+    },
+    _getFillHash(fill: Fill): string {
+        const fillJSON = JSON.stringify(fill);
+        const fillHash = ethUtil.sha256(fillJSON);
+        return fillHash.toString('hex');
+    },
+};