diff --git a/src/model/AssetMap.ts b/src/model/AssetMap.ts
index 844ce40..bee260c 100644
--- a/src/model/AssetMap.ts
+++ b/src/model/AssetMap.ts
@@ -9,6 +9,15 @@
         toNetwork: string;
         type: MapType;
 
+        constructor({ fromAddress, fromNetwork, toAddress, toNetwork, type }: AssetMap) {
+            super({});
+            this.fromAddress = fromAddress;
+            this.fromNetwork = fromNetwork;
+            this.toAddress = toAddress;
+            this.toNetwork = toNetwork;
+            this.type = type;
+        }
+
         deserialise(): string {
             let parsed = JSON.parse(JSON.stringify(this));
             parsed = sortObjectKeys(parsed);
diff --git a/src/repo/index.ts b/src/repo/index.ts
index 70750b5..a65b501 100644
--- a/src/repo/index.ts
+++ b/src/repo/index.ts
@@ -1,5 +1,5 @@
 
-import { GITHUB_USER_CONTENT_BASE_URL, REPO_CLONE_URL } from '../utils/constants';
+import { DEFAULT_REPO_DISK_LOCATION, GITHUB_USER_CONTENT_BASE_URL, REPO_CLONE_URL } from '../utils/constants';
 import { getDirectories, readAndParseJson } from '../utils/filesystem';
 import { push } from '../utils/git';
 import fs from 'fs';
@@ -116,4 +116,20 @@ export function getAssetMaps(networkCode: string, address: string): AssetMap[] {
 
     return readAndParseJson(assetMapInfoFile)
         .map(map => new AssetMap(map));
+}
+
+export function addAssetMap(map: AssetMap, repoPath: string = DEFAULT_REPO_DISK_LOCATION) {
+    const assetMapInfoFile = path.join(repoPath, getDirPathForTokenlist(map.fromNetwork, map.fromAddress), 'maps.json');
+
+    if(!fs.existsSync(assetMapInfoFile)) {
+        fs.writeFileSync(assetMapInfoFile, JSON.stringify([map], null, 2));
+        return;
+    }
+
+    const assetMaps = readAndParseJson(assetMapInfoFile)
+        .map(map => new AssetMap(map));
+
+    assetMaps.push(map);
+
+    fs.writeFileSync(assetMapInfoFile, JSON.stringify(assetMaps, null, 2));
 }
\ No newline at end of file