diff --git a/src/premints/zora_premint/contract.rs b/src/premints/zora_premint/contract.rs
index 481758f..d72fe88 100644
--- a/src/premints/zora_premint/contract.rs
+++ b/src/premints/zora_premint/contract.rs
@@ -25,6 +25,8 @@ sol! {
 }
 
 pub trait ZoraPremint {
+    const VERSION: &'static str;
+
     fn collection_address(&self) -> Address;
     fn chain_id(&self) -> u64;
     fn signature(&self) -> String;
diff --git a/src/premints/zora_premint/erc20v1.rs b/src/premints/zora_premint/erc20v1.rs
index df47a17..597611b 100644
--- a/src/premints/zora_premint/erc20v1.rs
+++ b/src/premints/zora_premint/erc20v1.rs
@@ -1,3 +1,10 @@
+use std::borrow::Cow;
+
+use alloy::sol_types::private::U256;
+use alloy_primitives::Address;
+use alloy_sol_types::Eip712Domain;
+use serde::{Deserialize, Serialize};
+
 use crate::premints::zora_premint::contract::IZoraPremintERC20V1;
 
 // aliasing the types here for readability. the original name need to stay
@@ -5,3 +12,64 @@ use crate::premints::zora_premint::contract::IZoraPremintERC20V1;
 pub type PremintConfigERC20V1 = IZoraPremintERC20V1::CreatorAttribution;
 pub type TokenCreationConfigERC20V1 = IZoraPremintERC20V1::TokenCreationConfig;
 pub type ContractCreationConfigERC20V1 = IZoraPremintERC20V1::ContractCreationConfig;
+
+// modelled after the PremintRequest API type
+#[derive(Debug, Serialize, Deserialize, Clone, PartialEq)]
+#[serde(rename_all = "camelCase")]
+pub struct ZoraPremintERC20V1 {
+    pub collection: ContractCreationConfigERC20V1,
+    pub premint: PremintConfigERC20V1,
+    pub collection_address: Address,
+    pub chain_id: u64,
+    pub signature: String,
+}
+
+impl Default for ZoraPremintERC20V1 {
+    fn default() -> Self {
+        Self {
+            collection: ContractCreationConfigERC20V1 {
+                contractAdmin: Default::default(),
+                contractURI: "".to_string(),
+                contractName: "".to_string(),
+            },
+            premint: PremintConfigERC20V1 {
+                tokenConfig: TokenCreationConfigERC20V1 {
+                    tokenURI: "".to_string(),
+                    maxSupply: Default::default(),
+                    maxTokensPerAddress: 0,
+                    currency: Default::default(),
+                    pricePerToken: U256::try_from(0).unwrap(),
+                    mintStart: 0,
+                    mintDuration: 0,
+                    royaltyBPS: 0,
+                    payoutRecipient: Default::default(),
+                    createReferral: Default::default(),
+                    erc20Minter: Default::default(),
+                },
+                uid: 0,
+                version: 0,
+                deleted: false,
+            },
+            collection_address: Address::default(),
+            chain_id: 0,
+            signature: String::default(),
+        }
+    }
+}
+
+impl ZoraPremintERC20V1 {
+    pub fn eip712_domain(&self) -> Eip712Domain {
+        Eip712Domain {
+            name: Some(Cow::from("Preminter")),
+            version: Some(Cow::from("ERC20_1")),
+            chain_id: Some(U256::from(self.chain_id)),
+            verifying_contract: Some(self.collection_address),
+            salt: None,
+        }
+    }
+
+    /// Recreate a deterministic GUID for a premint
+    fn event_to_guid(chain_id: u64, event: &IZoraPremintERC20V1::Preminted) -> String {
+        format!("{:?}:{:?}:{:?}", chain_id, event.contractAddress, event.uid)
+    }
+}
diff --git a/src/premints/zora_premint/rules.rs b/src/premints/zora_premint/rules.rs
index 97c4029..eeeee71 100644
--- a/src/premints/zora_premint/rules.rs
+++ b/src/premints/zora_premint/rules.rs
@@ -13,8 +13,8 @@ use crate::{ignore, reject, typed_rule};
 
 // create premint v2 rule implementations here
 
-pub async fn is_authorized_to_create_premint<T: Reader>(
-    premint: &ZoraPremintV2,
+pub async fn is_authorized_to_create_premint<T: Reader, P>(
+    premint: &P,
     context: &RuleContext<T>,
 ) -> eyre::Result<Evaluation> {
     let rpc = match context.rpc {
@@ -73,7 +73,7 @@ pub async fn premint_version_supported<T: Reader>(
 
     let result = view_contract_call(call, rpc, PREMINT_FACTORY_ADDR).await?;
 
-    match result.versions.contains(&"2".to_string()) {
+    match result.versions.contains(&"ERC20_1".to_string()) {
         true => Ok(Accept),
         false => reject!("Premint version 2 not supported by contract"),
     }