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Removes zero address check from balanceOf in ERC1155 (#4263)

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Co-authored-by: bpachai <bpachai@v2soft.com>
Co-authored-by: Francisco Giordano <fg@frang.io>
This commit is contained in:
Balaji Shetty Pachai
2023-05-24 14:09:06 +05:30
committed by GitHub
parent 7e814a3074
commit cbc6145f5f
3 changed files with 15 additions and 13 deletions
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5
.changeset/smooth-books-wink.md Normal file
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@ -0,0 +1,5 @@
---
'openzeppelin-solidity': major
---
`ERC1155`: Remove check for address zero in `balanceOf`.

1
contracts/token/ERC1155/ERC1155.sol
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@ -68,7 +68,6 @@ contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) public view virtual override returns (uint256) {
require(account != address(0), "ERC1155: address zero is not a valid owner");
return _balances[id][account];
}

22
test/token/ERC1155/ERC1155.behavior.js
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@ -20,11 +20,8 @@ function shouldBehaveLikeERC1155([minter, firstTokenHolder, secondTokenHolder, m
describe('like an ERC1155', function () {
describe('balanceOf', function () {
it('reverts when queried about the zero address', async function () {
await expectRevert(
this.token.balanceOf(ZERO_ADDRESS, firstTokenId),
'ERC1155: address zero is not a valid owner',
);
it('should return 0 when queried about the zero address', async function () {
expect(await this.token.balanceOf(ZERO_ADDRESS, firstTokenId)).to.be.bignumber.equal('0');
});
context("when accounts don't own tokens", function () {
@ -76,14 +73,15 @@ function shouldBehaveLikeERC1155([minter, firstTokenHolder, secondTokenHolder, m
);
});
it('reverts when one of the addresses is the zero address', async function () {
await expectRevert(
this.token.balanceOfBatch(
[firstTokenHolder, secondTokenHolder, ZERO_ADDRESS],
[firstTokenId, secondTokenId, unknownTokenId],
),
'ERC1155: address zero is not a valid owner',
it('should return 0 as the balance when one of the addresses is the zero address', async function () {
const result = await this.token.balanceOfBatch(
[firstTokenHolder, secondTokenHolder, ZERO_ADDRESS],
[firstTokenId, secondTokenId, unknownTokenId],
);
expect(result).to.be.an('array');
expect(result[0]).to.be.a.bignumber.equal('0');
expect(result[1]).to.be.a.bignumber.equal('0');
expect(result[2]).to.be.a.bignumber.equal('0');
});
context("when accounts don't own tokens", function () {