From 49ea6e0f0f16118668a0bb3fba34aabd63d8678c Mon Sep 17 00:00:00 2001 From: Andrew Cooke Date: Fri, 14 Jun 2019 19:37:43 -0400 Subject: [PATCH] Automatically merged updates to draft EIP(s) 1155 (#2120) Hi, I'm a bot! This change was automatically merged because: - It only modifies existing Draft or Last Call EIP(s) - The PR was approved or written by at least one author of each modified EIP - The build is passing --- EIPS/eip-1155.md | 1 + 1 file changed, 1 insertion(+) diff --git a/EIPS/eip-1155.md b/EIPS/eip-1155.md index 4f1bfb4cafa9b9..d724da1c290007 100644 --- a/EIPS/eip-1155.md +++ b/EIPS/eip-1155.md @@ -424,6 +424,7 @@ If the optional `ERC1155Metadata_URI` extension is included: - An implementation MAY emit the `URI` event during a mint operation but it is NOT mandatory. An observer MAY fetch the metadata uri at mint time from the `uri` function if it was not emitted. * The `uri` function SHOULD be used to retrieve values if no event was emitted. * The `uri` function MUST return the same value as the latest event for an `_id` if it was emitted. +* The `uri` function MUST NOT be used to check for the existence of a token as it is possible for an implementation to return a valid string even if the token does not exist. ```solidity pragma solidity ^0.5.9;