ERC-1155 multi-token standard in Blockchain / Solidity - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the ERC-1155 standard in blockchain?

ERC-1155 is a multi-token standard on Ethereum that allows a single smart contract to manage multiple token types, including both fungible and non-fungible tokens.

intermediate

How does ERC-1155 improve efficiency compared to ERC-20 and ERC-721?

ERC-1155 reduces transaction costs and complexity by allowing batch transfers of multiple token types in one call, unlike ERC-20 and ERC-721 which handle tokens individually.

beginner

What is a key feature of ERC-1155 regarding token types?

ERC-1155 supports both fungible tokens (like currencies) and non-fungible tokens (unique items) within the same contract.

intermediate

Explain the purpose of the safeTransferFrom function in ERC-1155.

safeTransferFrom securely transfers a specific amount of a token type from one address to another, checking that the receiver can handle the tokens to prevent loss.

intermediate

What event does ERC-1155 emit when tokens are transferred?

ERC-1155 emits TransferSingle or TransferBatch events to notify off-chain applications about token transfers, supporting single or multiple token types respectively.

Which of the following best describes ERC-1155?

A A standard for managing multiple token types in one contract

B A standard only for fungible tokens

C A standard only for non-fungible tokens

D A standard for creating smart contracts unrelated to tokens

ERC-1155 allows managing multiple token types, both fungible and non-fungible, in a single contract.

What is a main advantage of batch transfers in ERC-1155?

A They increase gas fees

B They require multiple smart contracts

C They reduce transaction costs by sending multiple tokens at once

D They only work for fungible tokens

Batch transfers reduce costs by combining multiple token transfers into one transaction.

Which function in ERC-1155 checks if the receiver can handle tokens safely?

A transferFrom

B mint

C approve

D safeTransferFrom

safeTransferFrom ensures the receiver contract implements the required interface to accept tokens.

What types of tokens can ERC-1155 manage?

A Only non-fungible tokens

B Both fungible and non-fungible tokens

C Only fungible tokens

D Only stablecoins

ERC-1155 supports multiple token types including fungible and non-fungible tokens.

Which event is emitted when multiple token types are transferred in ERC-1155?

A TransferBatch

B Approval

C TransferSingle

D Mint

TransferBatch event is emitted for batch transfers of multiple token types.

Describe the main benefits of using the ERC-1155 multi-token standard over ERC-20 and ERC-721.

Think about efficiency and token variety.

Explain how safeTransferFrom works in ERC-1155 and why it is important.

Consider safety in token transfers.