Use nat Candid representation for ERC-1155 balanceOf result (#59)

* Use 'nat' Candid representation for ERC-1155 'balanceOf' result * Update Candid interface
dfinity · Sep 13, 2023 · 5037831 · 5037831
1 parent 8ae47a3
commit 5037831
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Showing 2 changed files with 3 additions and 5 deletions.
diff --git a/canisters/ic_eth/ic_eth.did b/canisters/ic_eth/ic_eth.did
@@ -1,5 +1,5 @@
 service : {
  verify_ecdsa : (eth_address : text, message : text, signature : text) -> (bool) query;
  erc721_owner_of : (network : text, contract_address : text, token_id : nat64) -> (text);
- erc1155_balance_of : (network : text, contract_address : text, owner_address : text, token_id : nat64) -> (nat64);
+ erc1155_balance_of : (network : text, contract_address : text, owner_address : text, token_id : nat64) -> (nat);
 }
diff --git a/canisters/ic_eth/src/lib.rs b/canisters/ic_eth/src/lib.rs
@@ -60,9 +60,7 @@ pub async fn erc1155_balance_of(
  contract_address: String,
  owner_address: String,
  token_id: u64,
-) -> u64 {
- // TODO: use `candid::Nat` in place of `u64`
-
+) -> u128 {
  let owner_address =
  ethers_core::types::Address::from_str(&owner_address).expect("Invalid owner address");
 
@@ -79,7 +77,7 @@ pub async fn erc1155_balance_of(
  )
  .await;
  match result.get(0) {
- Some(Token::Uint(n)) => n.as_u64(),
+ Some(Token::Uint(n)) => n.as_u128(),
  _ => panic!("Unexpected result"),
  }
 }