diff --git a/common/network-defaults/build.rs b/common/network-defaults/build.rs
new file mode 100644
index 0000000000..9e50e2a2c5
--- /dev/null
+++ b/common/network-defaults/build.rs
@@ -0,0 +1,10 @@
+// Copyright 2021 - Nym Technologies SA <contact@nymtech.net>
+// SPDX-License-Identifier: Apache-2.0
+
+fn main() {
+    match option_env!("NETWORK") {
+        None | Some("testnet") => println!("cargo:rustc-cfg=network=\"testnet\"",),
+        Some("qa") => println!("cargo:rustc-cfg=network=\"qa\""),
+        _ => panic!("No such network"),
+    }
+}
diff --git a/common/network-defaults/src/lib.rs b/common/network-defaults/src/lib.rs
index 53011af603..946ebcd99c 100644
--- a/common/network-defaults/src/lib.rs
+++ b/common/network-defaults/src/lib.rs
@@ -6,6 +6,11 @@ use time::OffsetDateTime;
 use url::Url;
 
 pub mod eth_contract;
+#[cfg(network = "testnet")]
+pub mod testnet;
+
+#[cfg(network = "testnet")]
+pub use testnet::*;
 
 #[derive(Debug, Serialize, Deserialize, Clone)]
 pub struct ValidatorDetails {
@@ -38,6 +43,7 @@ impl ValidatorDetails {
     }
 }
 
+#[cfg(network = "testnet")]
 pub fn default_validators() -> Vec<ValidatorDetails> {
     vec![
         ValidatorDetails::new(
@@ -62,10 +68,7 @@ pub fn default_api_endpoints() -> Vec<Url> {
         .collect()
 }
 
-pub const DEFAULT_MIXNET_CONTRACT_ADDRESS: &str = "punk10pyejy66429refv3g35g2t7am0was7yalwrzen";
-pub const DEFAULT_VESTING_CONTRACT_ADDRESS: &str = "";
-pub const REWARDING_VALIDATOR_ADDRESS: &str = "punk1v9qauwdq5terag6uvfsdytcs2d0sdmfdy7hgk3";
-
+// Ethereum constants used for token bridge
 /// How much bandwidth (in bytes) one token can buy
 const BYTES_PER_TOKEN: u64 = 1024 * 1024 * 1024;
 /// How many ERC20 tokens should be burned to buy bandwidth
@@ -73,20 +76,10 @@ pub const TOKENS_TO_BURN: u64 = 10;
 /// Default bandwidth (in bytes) that we try to buy
 pub const BANDWIDTH_VALUE: u64 = TOKENS_TO_BURN * BYTES_PER_TOKEN;
 
-// Ethereum constants used for token bridge
-pub const ETH_CONTRACT_ADDRESS: [u8; 20] =
-    hex_literal::hex!("9fEE3e28c17dbB87310A51F13C4fbf4331A6f102");
 pub const ETH_MIN_BLOCK_DEPTH: usize = 7;
-pub const COSMOS_CONTRACT_ADDRESS: &str = "punk1jld76tqw4wnpfenmay2xkv86nr3j0w426eka82";
-// Name of the event triggered by the eth contract. If the event name is changed,
-// this would also need to be changed; It is currently tested against the json abi
-pub const ETH_EVENT_NAME: &str = "Burned";
-pub const ETH_BURN_FUNCTION_NAME: &str = "burnTokenForAccessCode";
 
 /// Defaults Cosmos Hub/ATOM path
 pub const COSMOS_DERIVATION_PATH: &str = "m/44'/118'/0'/0/0";
-pub const BECH32_PREFIX: &str = "punk";
-pub const DENOM: &str = "upunk";
 // as set by validators in their configs
 // (note that the 'amount' postfix is relevant here as the full gas price also includes denom)
 pub const GAS_PRICE_AMOUNT: f64 = 0.025;
diff --git a/common/network-defaults/src/testnet.rs b/common/network-defaults/src/testnet.rs
new file mode 100644
index 0000000000..7a221f856e
--- /dev/null
+++ b/common/network-defaults/src/testnet.rs
@@ -0,0 +1,17 @@
+// Copyright 2021 - Nym Technologies SA <contact@nymtech.net>
+// SPDX-License-Identifier: Apache-2.0
+
+pub const BECH32_PREFIX: &str = "punk";
+pub const DENOM: &str = "upunk";
+
+pub const DEFAULT_MIXNET_CONTRACT_ADDRESS: &str = "punk10pyejy66429refv3g35g2t7am0was7yalwrzen";
+pub const DEFAULT_VESTING_CONTRACT_ADDRESS: &str = "";
+pub const COSMOS_CONTRACT_ADDRESS: &str = "punk1jld76tqw4wnpfenmay2xkv86nr3j0w426eka82";
+pub const REWARDING_VALIDATOR_ADDRESS: &str = "punk1v9qauwdq5terag6uvfsdytcs2d0sdmfdy7hgk3";
+pub const ETH_CONTRACT_ADDRESS: [u8; 20] =
+    hex_literal::hex!("9fEE3e28c17dbB87310A51F13C4fbf4331A6f102");
+
+// Name of the event triggered by the eth contract. If the event name is changed,
+// this would also need to be changed; It is currently tested against the json abi
+pub const ETH_EVENT_NAME: &str = "Burned";
+pub const ETH_BURN_FUNCTION_NAME: &str = "burnTokenForAccessCode";