2 files changed, 15 insertions, 2 deletions
diff --git a/packages/deployer/src/utils/constants.ts b/packages/deployer/src/utils/constants.ts
index 8871a470d..57f30dec8 100644
--- a/packages/deployer/src/utils/constants.ts
+++ b/packages/deployer/src/utils/constants.ts
@@ -1,3 +1,4 @@
 export const constants = {
     NULL_BYTES: '0x',
+    SOLIDITY_FILE_EXTENSION: '.sol',
 };
diff --git a/packages/deployer/src/utils/types.ts b/packages/deployer/src/utils/types.ts
index 46481828e..a3f722976 100644
--- a/packages/deployer/src/utils/types.ts
+++ b/packages/deployer/src/utils/types.ts
@@ -15,13 +15,14 @@ export interface ContractArtifact {
 }
 
 export interface ContractNetworks {
-    [key: number]: ContractData;
+    [key: number]: ContractNetworkData;
 }
 
-export interface ContractData {
+export interface ContractNetworkData {
     solc_version: string;
     optimizer_enabled: number;
     keccak256: string;
+    source_tree_hash: string;
     abi: Web3.ContractAbi;
     unlinked_binary: string;
     address?: string;
@@ -64,6 +65,17 @@ export interface ContractSources {
     [key: string]: string;
 }
 
+export interface ContractSourceData {
+    [key: string]: ContractSpecificSourceData;
+}
+
+export interface ContractSpecificSourceData {
+    dependencies: string[];
+    solcVersion: string;
+    sourceHash: Buffer;
+    sourceTreeHashIfExists?: Buffer;
+}
+
 export interface ImportContents {
     contents: string;
 }