1 files changed, 26 insertions, 0 deletions
diff --git a/packages/migrations/src/artifact_writer.ts b/packages/migrations/src/artifact_writer.ts
new file mode 100644
index 000000000..2da5a09dd
--- /dev/null
+++ b/packages/migrations/src/artifact_writer.ts
@@ -0,0 +1,26 @@
+import { BaseContract } from '@0xproject/base-contract';
+import { ContractArtifact } from '@0xproject/sol-compiler';
+import * as fs from 'fs';
+import * as path from 'path';
+
+export class ArtifactWriter {
+    private _artifactsDir: string;
+    private _networkId: number;
+    constructor(artifactsDir: string, networkId: number) {
+        this._artifactsDir = artifactsDir;
+        this._networkId = networkId;
+    }
+    // This updates the artifact file but does not update the `artifacts` module above. It will not
+    // contain the saved artifact changes.
+    public saveArtifact(contract: BaseContract): void {
+        const contractName = contract.contractName;
+        const artifactFile = path.join(this._artifactsDir, `${contractName}.json`);
+        const artifact: ContractArtifact = JSON.parse(fs.readFileSync(artifactFile).toString());
+        artifact.networks[this._networkId] = {
+            address: contract.address,
+            links: {},
+            constructorArgs: JSON.stringify(contract.constructorArgs),
+        };
+        fs.writeFileSync(artifactFile, JSON.stringify(artifact, null, '\t'));
+    }
+}