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https://github.com/aunyks/envoy-token
💸 [Deprecated] An ERC20 token you can transfer without gas.
https://github.com/aunyks/envoy-token
Last synced: 23 days ago
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💸 [Deprecated] An ERC20 token you can transfer without gas.
- Host: GitHub
- URL: https://github.com/aunyks/envoy-token
- Owner: aunyks
- License: mit
- Created: 2018-09-15T15:48:33.000Z (over 6 years ago)
- Default Branch: master
- Last Pushed: 2018-09-15T23:03:21.000Z (over 6 years ago)
- Last Synced: 2024-11-13T02:51:58.791Z (about 1 month ago)
- Language: JavaScript
- Homepage:
- Size: 92.8 KB
- Stars: 2
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Envoy
An ERC20-compliant token equipped with delegated transferring.
Envoy is an ERC20 token that borrows from the [ERC865](https://github.com/ethereum/EIPs/issues/865) standard. This allows tokens that descend from Envoy to be transferred without the sender having any Ether to spend as gas, as long as a delegate with Ether is willing to broadcast the transaction (while taking a fee as payment).
## How do I incorporate it in my project?
Install via NPM to your Truffle project.
```
> npm install -S envoy-token
```
and import the installed package.
```
pragma solidity a.solc.version;
import "envoy-token/contracts/EnvoyToken.sol";
contract MyToken is EnvoyToken {}
```
Or import via the Github url!
```
pragma solidity a.solc.version;
import "github.com/aunyks/envoy-token/contracts/EnvoyToken.sol";
contract MyToken is EnvoyToken {}
```
## API
This token contains all functions from the ERC20 standard that track supply, balances, and allowances. Thus, it does not have the `symbol()`, `name()`, and `decimals()` members.
The Envoy token adds two functions from the ERC865 standard: `transferPreSigned()` and `transferPreSignedHashing()`.
**transferPreSigned(
bytes signature,
address recipient,
uint256 value,
uint256 fee,
uint256 nonce
)**
Returns true if transaction succeeds.
- `signature` -- A byte array of the signature of keccak256(tokenContractAddress, recipient, value, fee, nonce)
- `recipient` -- The account to which the tokens will be sent.
- `value` -- The number of tokens to be sent to the recipient.
- `fee` -- The number of tokens to be sent to the delegate.
- `nonce` -- A transaction nonce.
___
**transferPreSignedHashing(
address token,
address recipient,
uint256 value,
uint256 fee,
uint256 nonce
)**
Returns the `bytes32` digest of the function parameters after tightly packing.
- `token` -- The address of the token contract.
- `recipient` -- The account to which the tokens will be sent.
- `value` -- The number of tokens to be sent to the recipient.
- `fee` -- The number of tokens to be sent to the delegate.
- `nonce` -- A transaction nonce.
## Acknowledgements
Some code in this repository is borrowed from the [OpenZeppelin Solidity](https://github.com/OpenZeppelin/openzeppelin-solidity) project.
## LICENSE
This project is licensed under the MIT License. If your project uses Envoy, this project must be publicly attributed.
Copyright (c) 2018 Gerald Nash