🪶 Essential Eth 🪶
An alternative for ethers & web3 that's 10x smaller

Why you should replace Ethers.js and web3

🐜️ tiny
🔐 Strongly written TypeScript
🧪 Matches both ethers and web3
- ⚡️ Near-identical API to ethers
- ⚡️ Similar but improved API to web3
🙌 Works for all EVM chains
- 💎 Ethereum
- 🟣 Polygon
- 🔴 Optimism
- 🔵 Arbitrum
- Many more
🧪 Strongly tested
🌲 Tree-shaking and no side-effects
🙌 All common JS versions (CommonJS, ESM, & UMD)
- ✅ Node 20, 18, 16, & 14
- ✅ Web

Install

npm install --save essential-eth # TypeScript included

# or yarn
yarn add essential-eth # TypeScript included

Browsers:

<!-- index.html -->
<script src="https://unpkg.com/essential-eth@0.10.3"></script>

🛠 Utils

import { etherToWei } from 'essential-eth';

// or in a non-import environment
const { etherToWei } = require('essential-eth');

`arrayify`

arrayify(value: number | BytesLike | Hexable, options: DataOptions): Uint8Array

View Example

import { arrayify } from 'essential-eth';

arrayify(1);
// Uint8Array(1) [ 1 ]

arrayify(0x1234);
// Uint8Array(2) [ 18, 52 ]

arrayify('0x1', { hexPad: 'right' });
// Uint8Array(1) [ 16 ]

`computeAddress`

computeAddress(key: string): string

View Example

import { computeAddress } from 'essential-eth';

computeAddress(
  '0x0458eb591f407aef12936bd2989ca699cf5061de9c4964dd6eb6005fd8f580c407434447e813969a1be6e9954b002cad84dfc67a69e032b273e4695e7d0db2d952',
); // public key
// '0xA2902059a7BF992f1450BACD7357CCAa5cC8336a'

computeAddress(
  '0x2f2c419acf4a1da8c1ebea75bb3fcfbd3ec2aa3bf0162901ccdc2f38b8f92427',
); // private key
// '0xA2902059a7BF992f1450BACD7357CCAa5cC8336a'

`computePublicKey`

computePublicKey(privKey: BytesLike): string

View Example

import { computePublicKey } from 'essential-eth';

computePublicKey(
  '0xb27cc8dea0177d910110e8d3ec5480d56c723abf433529f4063f261ffdb9297c',
);
// '0x045cd0032015eecfde49f82f4e149d804e8ac6e3a0bface32e37c72a71ceac864fe84da7e8df84342f7b11dfb753c4d158f636142b46b29cf7f0f171ae0aa4fb87'

computePublicKey([
  50, 102, 50, 99, 52, 49, 57, 97, 99, 102, 52, 97, 49, 100, 97, 56, 99, 49,
  101, 98, 101, 97, 55, 53, 98, 98, 51, 102, 99, 102, 98, 100,
]);
// '0x04a9cea77eca949df84f661cee153426fb51f2294b9364b4fac240df57360b9b0ac9c99e4d7966491ab4c81f8c82e0cd24ec5759832ad4ab736d22c7d90b806ee8'

`concat`

concat(arrayOfBytesLike: Array<BytesLikeWithNumber>): Uint8Array

View Example

import { concat } from 'essential-eth';

concat([0, 1]);
// Uint8Array(2) [ 0, 1 ]

`etherToGwei`

etherToGwei(etherQuantity: string | number | TinyBig | Big): TinyBig

View Example

import { etherToGwei } from 'essential-eth';

etherToGwei('1000').toString();
// '1000000000000'
etherToGwei(1000).toString();
// '1000000000000'

etherToGwei('1000').toNumber();
// 1000000000000
etherToGwei(1000).toNumber();
// 1000000000000

`etherToWei`

etherToWei(etherQuantity: string | number | TinyBig | Big): TinyBig

View Example

import { etherToWei } from 'essential-eth';

etherToWei('1000').toString();
// '1000000000000000000000'
etherToWei(1000).toString();
// '1000000000000000000000'

etherToWei('1000').toNumber();
// 1000000000000000000000
etherToWei(1000).toNumber();
// 1000000000000000000000

`gweiToEther`

gweiToEther(gweiQuantity: string | number | TinyBig | Big): TinyBig

View Example

import { gweiToEther } from 'essential-eth';

gweiToEther('1000000000000').toString();
// '1000'
gweiToEther(1000000000000).toString();
// '1000'

gweiToEther('1000000000000').toNumber();
// 1000
gweiToEther(1000000000000).toNumber();
// 1000

`hashMessage`

hashMessage(message: string | Bytes): string

View Example

import { hashMessage } from 'essential-eth';

hashMessage('Hello World');
// '0xa1de988600a42c4b4ab089b619297c17d53cffae5d5120d82d8a92d0bb3b78f2'

`hexConcat`

hexConcat(items: Array<BytesLike>): string

View Example

import { hexConcat } from 'essential-eth';

hexConcat([[2, 4, 0, 1], 9, '0x2934', '0x3947']);
// '0x020400010929343947'

`hexDataLength`

hexDataLength(data: BytesLike): undefined

View Example

import { hexDataLength } from 'essential-eth';

hexDataLength([2, 4, 0, 1]);
// 4

hexDataLength('0x3925');
// 2

`hexDataSlice`

hexDataSlice(data: BytesLikeWithNumber, offset: number, endOffset: number): string

View Example

import { hexDataSlice } from 'essential-eth';

hexDataSlice([20, 6, 48], 0, 2);
// '0x1406'

`hexStripZeros`

hexStripZeros(value: BytesLike): string

View Example

import { hexStripZeros } from 'essential-eth';

hexStripZeros([0, 0, 0, 48]);
// '0x30'

`hexValue`

hexValue(value: number | bigint | BytesLike | Hexable): string

View Example

import { hexValue } from 'essential-eth';

hexValue(39);
// '0x27'

hexValue([9, 4, 19, 4]);
// '0x9041304'

`hexZeroPad`

hexZeroPad(value: BytesLikeWithNumber, length: number): string

View Example

import { hexZeroPad } from 'essential-eth';

hexZeroPad('0x60', 2);
// '0x0060'

hexZeroPad(0x60, 3);
// '0x000060'

hexZeroPad('12345', 1);
// Throws

`hexlify`

hexlify(value: number | bigint | BytesLike | Hexable, options: DataOptions): string

View Example

import { hexlify } from 'essential-eth';

hexlify(4);
// '0x04'

hexlify(14);
// '0x0e'

`isAddress`

isAddress(address: string): boolean

View Example

import { isAddress } from 'essential-eth';

isAddress('0xc0deaf6bd3f0c6574a6a625ef2f22f62a5150eab');
// true

isAddress('bad');
// false

// Does NOT support ENS.
isAddress('vitalik.eth');
// false

`isBytes`

isBytes(value: any): value

View Example

import { isBytes } from 'essential-eth';

isBytes([1, 2, 3]);
// true

isBytes(false);
// false

isBytes(new Uint8Array(1));
// true

`isBytesLike`

isBytesLike(value: any): value

View Example

import { isBytesLike } from 'essential-eth';

isBytesLike([1, 2, 3]);
// true

isBytesLike(false);
// false

isBytesLike(new Uint8Array(1));
// true

`isHexString`

isHexString(value: any, length: number): boolean

View Example

import { isHexString } from 'essential-eth';

isHexString('0x4924');
// true

isHexString('0x4924', 4);
// false
// length of 4 in bytes would mean a hex string with 8 characters

`jsonRpcProvider`

jsonRpcProvider(rpcUrl: string): JsonRpcProvider

View Example

import { jsonRpcProvider } from 'essential-eth';

jsonRpcProvider()
  .getBlock('latest')
  .then((block) => {
    console.log(block.number);
  });
// 14530496

`keccak256`

keccak256(data: BytesLike): string

View Example

import { keccak256 } from 'essential-eth';

keccak256('essential-eth');
// '0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470'

keccak256('0x123');
// '0x5fa2358263196dbbf23d1ca7a509451f7a2f64c15837bfbb81298b1e3e24e4fa'

`pack`

pack(types: Array<string>, values: Array<any>): string

View Example

import { pack } from 'essential-eth';

const types = ['bool', 'string', 'uint64'];
const values = [true, 'text', 30];
pack(types, values);
// '0x0174657874000000000000001e'

`solidityKeccak256`

solidityKeccak256(types: Array<string>, values: Array<any>): string

View Example

import { solidityKeccak256 } from 'essential-eth';

const types = ['string', 'bool', 'uint32'];
const values = ['essential-eth is great', true, 14];
solidityKeccak256(types, values);
// '0xe4d4c8e809faac09d58f468f0aeab9474fe8965d554c6c0f868c433c3fd6acab'

const types = ['bytes4', 'uint32[5]'];
const values = [
  [116, 101, 115, 116],
  [5, 3, 4, 9, 18],
];
solidityKeccak256(types, values);
// '0x038707a887f09355dc545412b058e7ba8f3c74047050c7c5e5e52eec608053d9'

`splitSignature`

splitSignature(signature: SignatureLike): Signature

View Example

import { splitSignature } from 'essential-eth';

const signature = '0x60bc4ed91f2021aefe7045f3f77bd12f87eb733aee24bd1965343b3c27b3971647252185b7d2abb411b01b5d1ac4ab41ea486df1e9b396758c1aec6c1b6eee331b';
splitSignature(signature);
{
 r: "0x60bc4ed91f2021aefe7045f3f77bd12f87eb733aee24bd1965343b3c27b39716",
 s: "0x47252185b7d2abb411b01b5d1ac4ab41ea486df1e9b396758c1aec6c1b6eee33",
 _vs: "0x47252185b7d2abb411b01b5d1ac4ab41ea486df1e9b396758c1aec6c1b6eee33",
 recoveryParam: 0,
 v: 27,
 yParityAndS: "0x47252185b7d2abb411b01b5d1ac4ab41ea486df1e9b396758c1aec6c1b6eee33",
 compact: "0x60bc4ed91f2021aefe7045f3f77bd12f87eb733aee24bd1965343b3c27b3971647252185b7d2abb411b01b5d1ac4ab41ea486df1e9b396758c1aec6c1b6eee33"
}

`stripZeros`

stripZeros(value: BytesLike): Uint8Array

View Example

import { stripZeros } from 'essential-eth';

stripZeros('0x00002834');
// Uint8Array { [Iterator]  0: 40, 1: 52 }
// Equivalent to '0x2834'

`tinyBig`

tinyBig(value: string | number | TinyBig | Big): TinyBig

View Example

import { tinyBig } from 'essential-eth';

tinyBig(10).times(3).toNumber();
// 30

`toChecksumAddress`

toChecksumAddress(address: string): string

View Example

import { toChecksumAddress } from 'essential-eth';

toChecksumAddress('0xfB6916095ca1df60bB79Ce92cE3Ea74c37c5d359');
// '0xfB6916095ca1df60bB79Ce92cE3Ea74c37c5d359'

Similar to "getAddress" in ethers.js

`toUtf8Bytes`

toUtf8Bytes(data: string): Uint8Array

View Example

import { toUtf8Bytes } from 'essential-eth';

toUtf8Bytes('essential-eth');
// Uint8Array { [Iterator] 0: 101, 1: 115, 2: 115, 3: 101, 4: 110, 5: 116, 6: 105, 7: 97, 8: 108, 9: 45, 10: 101, 11: 116, 12: 104 }

toUtf8Bytes('ethereum');
// Uint8Array { [Iterator]  0: 101, 1: 116, 2: 104, 3: 101, 4: 114, 5: 101, 6: 117, 7: 109 }

`weiToEther`

weiToEther(weiQuantity: string | number | TinyBig | Big): TinyBig

View Example

import { weiToEther } from 'essential-eth';

weiToEther('1000000000000000000000').toString();
// '1000'
weiToEther(1000000000000000000000).toString();
// '1000'

weiToEther('1000000000000000000000').toNumber();
// 1000
weiToEther(1000000000000000000000).toNumber();
// 1000

`zeroPad`

zeroPad(value: BytesLike, length: number): Uint8Array

View Example

import { zeroPad } from 'essential-eth';

zeroPad('0x039284');
// Uint8Array { [Iterator]  0: 0, 1: 0, 2: 0, 3: 3, 4: 146, 5: 132 }
// Equivalent to 0x000000039284

zeroPad([39, 25, 103, 45], 5);
// Uint8Array { [Iterator]  0: 0, 1: 39, 2: 25, 3: 103, 4: 45 }

The return-type TinyBig is just Big but expands scientific notation on toNumber() and toString()

Providers

import { JsonRpcProvider } from 'essential-eth';
const provider = new JsonRpcProvider('RPC URL HERE' /* Try POKT or Infura */);
// OR for very quick testing (limited to 10,000 requests)
const provider = new JsonRpcProvider();

Want a redundant provider that handles outages?

import { FallthroughProvider } from 'essential-eth';

// The FallthroughProvider handles falling through to the next valid URL.
// It's dynamic to never trust one URL again when it fails * until it has tried all other provided URLs
// The default timeout for a request is 8 seconds after which it moves to the next URL
const provider = new FallthroughProvider([
  'https://bad.com',
  'https://free-eth-node.com/api/eth',
]);
provider.getGasPrice().toNumber();
/*
39695942769
*/

`call`

provider.call(transaction: TransactionRequest, blockTag?: BlockTag): Promise<string>

View Example

import { JsonRpcProvider } from 'essential-eth';
const provider = new JsonRpcProvider('RPC URL HERE' /* Try Infura or POKT */);

await provider.call({
  to: '0x6b175474e89094c44da98b954eedeac495271d0f',
  data: '0x70a082310000000000000000000000006E0d01A76C3Cf4288372a29124A26D4353EE51BE',
});
// '0x0000000000000000000000000000000000000000000000000858898f93629000'

`estimateGas`

provider.estimateGas(transaction: TransactionRequest): Promise<TinyBig>

View Example

import { JsonRpcProvider } from 'essential-eth';
const provider = new JsonRpcProvider('RPC URL HERE' /* Try Infura or POKT */);

await provider.estimateGas({
  // Wrapped ETH address
  to: '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2',
  data: '0xd0e30db0',
  value: etherToWei('1.0').toHexString(),
});
// { TinyBig: "27938" }

`getBalance`

provider.getBalance(address: string, blockTag?: BlockTag): Promise<TinyBig>

View Example

import { JsonRpcProvider } from 'essential-eth';
const provider = new JsonRpcProvider('RPC URL HERE' /* Try Infura or POKT */);

await provider.getBalance('0x7cB57B5A97eAbe94205C07890BE4c1aD31E486A8');
// 28798127851528138

`getBlock`

provider.getBlock(timeFrame?: BlockTag, returnTransactionObjects?: boolean): Promise<BlockResponse>

View Example

import { JsonRpcProvider } from 'essential-eth';
const provider = new JsonRpcProvider('RPC URL HERE' /* Try Infura or POKT */);

await provider.getBlock(14879862);
// {
//   baseFeePerGas: { TinyBig: 39095728776 },
//   difficulty: { TinyBig: 14321294455359973 },
//   extraData: "0x486976656f6e2073672d6865617679",
//   gasLimit: { TinyBig: 29970620 },
//   gasUsed: { TinyBig: 20951384 },
//   hash: "0x563b458ec3c4f87393b53f70bdddc0058497109b784d8cacd9247ddf267049ab",
//   logsBloom:
//     "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",
//   miner: "0x1aD91ee08f21bE3dE0BA2ba6918E714dA6B45836",
//   mixHash: "0x73cc9419bfb89c9d41c3a8c34ce56b5ebe468bdcf870258d2e77262275d580ec",
//   nonce: "0x976f3f5d596ffb08",
//   number: 14879862,
//   parentHash: "0x95986ae14a71face8d9a6a379edd875b2e8bc73e4de0d9d460e7752bddb0f579",
//   receiptsRoot: "0x8e6ba2fd9bee602b653dae6e3132f16538c2c5df24f1df8c000392053f73defa",
//   sha3Uncles: "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
//   size: { TinyBig: 134483 },
//   stateRoot: "0xbf2bb67bd1c741f3d00904b8451d7c2cf4e3a2726f5a5884792ede2074747b85",
//   timestamp: { TinyBig: 1654016186 },
//   totalDifficulty: { TinyBig: 50478104614257705213748 },
//   transactions: [
//     "0xb3326a9149809603a2c28545e50e4f7d16e194bf5ee9764e0544603854c4a8d2",
//     "0x8b42095f8d335404a4896b2817b8e5e3d86a5a87cb434a8eec295d5280a7f48e",
//     "0x882f78fcb73f0f7ad0700bb0424a8b4beb366aaa93b88a3562c49a8d0ce4dcff",
//     ...
//   ],
//   transactionsRoot: "0x5934902f3dcc263ec34f24318179bf6301f53f4834685792066026f3a4849d72",
//   uncles: [],
// }

`getBlockNumber`

provider.getBlockNumber(): Promise<number>

View Example

import { JsonRpcProvider } from 'essential-eth';
const provider = new JsonRpcProvider('RPC URL HERE' /* Try Infura or POKT */);

await provider.getBlockNumber();
// 1053312

`getCode`

provider.getCode(address: string, blockTag?: BlockTag): Promise<string>

View Example

import { JsonRpcProvider } from 'essential-eth';
const provider = new JsonRpcProvider('RPC URL HERE' /* Try Infura or POKT */);

await jsonRpcProvider().getCode(
  '0xaC6095720221C79C6E7C638d260A2eFBC5D8d880',
  'latest',
);
// '0x608060405234801561001057600080fd5b506004361061...'

`getFeeData`

provider.getFeeData(): Promise<FeeData>

View Example

import { JsonRpcProvider } from 'essential-eth';
const provider = new JsonRpcProvider('RPC URL HERE' /* Try Infura or POKT */);

await provider.getFeeData();
// {
//   gasPrice: { TinyBig: "14184772639" },
//   lastBaseFeePerGas: { TinyBig: "14038523098" },
//   maxFeePerGas: { TinyBig: "29577046196" },
//   maxPriorityFeePerGas: { TinyBig: "1500000000" }
// }

`getGasPrice`

provider.getGasPrice(): Promise<TinyBig>

View Example

import { JsonRpcProvider } from 'essential-eth';
const provider = new JsonRpcProvider('RPC URL HERE' /* Try Infura or POKT */);

await provider.getGasPrice();
// 52493941856

`getLogs`

provider.getLogs(filter: Filter | FilterByBlockHash): Promise<Array<Log>>

View Example

import { JsonRpcProvider } from 'essential-eth';
const provider = new JsonRpcProvider('RPC URL HERE' /* Try Infura or POKT */);

provider.getLogs({
  address: '0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2',
  topics: [
    '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef',
    '0x00000000000000000000000021b8065d10f73ee2e260e5b47d3344d3ced7596e',
  ],
  fromBlock: 14825027,
  toBlock: 14825039,
});

[
  {
    address: '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2',
    blockHash:
      '0x8e0dfac2f704851960f866c8708b3bef2f66c0fee0329cf25ff0261b264ca6bc',
    blockNumber: 14825029,
    data: '0x000000000000000000000000000000000000000000000000005f862ee352a38a',
    logIndex: 384,
    removed: false,
    topics: [
      '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef',
      '0x00000000000000000000000021b8065d10f73ee2e260e5b47d3344d3ced7596e',
      '0x00000000000000000000000068b3465833fb72a70ecdf485e0e4c7bd8665fc45',
    ],
    transactionHash:
      '0xbd49031be16f8fd1775f4e0fe79b408ffd8ae9c65b2827ee47e3238e3f51f4c0',
    transactionIndex: 226,
  },
];

`getNetwork`

provider.getNetwork(): Promise<Network>

View Example

import { JsonRpcProvider } from 'essential-eth';
const provider = new JsonRpcProvider('RPC URL HERE' /* Try Infura or POKT */);

jsonRpcProvider('https://free-eth-node.com/api/eth').getNetwork();
// { chainId: 1, name: 'eth', ensAddress: '0x00000000000C2E074eC69A0dFb2997BA6C7d2e1e' }

jsonRpcProvider('https://free-eth-node.com/api/MATIC').getNetwork();
// { chainId: 137, name: 'MATIC', ensAddress: null }

`getTransaction`

provider.getTransaction(transactionHash: string): Promise<TransactionResponse>

View Example

import { JsonRpcProvider } from 'essential-eth';
const provider = new JsonRpcProvider('RPC URL HERE' /* Try Infura or POKT */);

await provider.getTransaction(
  '0x9014ae6ef92464338355a79e5150e542ff9a83e2323318b21f40d6a3e65b4789',
);
// {
//   accessList: [],
//   blockHash: "0x876810a013dbcd140f6fd6048c1dc33abbb901f1f96b394c2fa63aef3cb40b5d",
//   blockNumber: 14578286,
//   chainId: 1,
//   from: "0xdfD9dE5f6FA60BD70636c0900752E93a6144AEd4",
//   gas: { TinyBig: 112163 },
//   gasPrice: { TinyBig: 48592426858 },
//   hash: "0x9014ae6ef92464338355a79e5150e542ff9a83e2323318b21f40d6a3e65b4789",
//   input: "0x83259f17000000000000000000000000000000000000000000...",
//   maxFeePerGas: { TinyBig: 67681261618 },
//   maxPriorityFeePerGas: { TinyBig: 1500000000 },
//   nonce: { TinyBig: 129 },
//   r: "0x59a7c15b12c18cd68d6c440963d959bff3e73831ffc938e75ecad07f7ee43fbc",
//   s: "0x1ebaf05f0d9273b16c2a7748b150a79d22533a8cd74552611cbe620fee3dcf1c",
//   to: "0x39B72d136ba3e4ceF35F48CD09587ffaB754DD8B",
//   transactionIndex: 29,
//   type: 2,
//   v: 0,
//   value: { TinyBig: 0 },
//   confirmations: 298140,
// }

`getTransactionCount`

provider.getTransactionCount(address: string, blockTag?: BlockTag): Promise<number>

View Example

import { JsonRpcProvider } from 'essential-eth';
const provider = new JsonRpcProvider('RPC URL HERE' /* Try Infura or POKT */);

await provider.getTransactionCount(
  '0x71660c4005ba85c37ccec55d0c4493e66fe775d3',
);
// 1060000

await provider.getTransactionCount(
  '0x71660c4005ba85c37ccec55d0c4493e66fe775d3',
  'latest',
);
// 1060000

await provider.getTransactionCount(
  '0x71660c4005ba85c37ccec55d0c4493e66fe775d3',
  14649390,
);
// 1053312

`getTransactionReceipt`

provider.getTransactionReceipt(transactionHash: string): Promise<TransactionReceipt>

View Example

import { JsonRpcProvider } from 'essential-eth';
const provider = new JsonRpcProvider('RPC URL HERE' /* Try Infura or POKT */);

await provider.getTransactionReceipt(
  '0x9014ae6ef92464338355a79e5150e542ff9a83e2323318b21f40d6a3e65b4789',
);
// {
//   blockHash: "0x876810a013dbcd140f6fd6048c1dc33abbb901f1f96b394c2fa63aef3cb40b5d",
//   blockNumber: 14578286,
//   contractAddress: null,
//   cumulativeGasUsed: { TinyBig: 3067973 },
//   effectiveGasPrice: { TinyBig: 48592426858 },
//   from: "0xdfD9dE5f6FA60BD70636c0900752E93a6144AEd4",
//   gasUsed: { TinyBig: 112163 },
//   logs: [
//     {
//       address: "0x0eDF9bc41Bbc1354c70e2107F80C42caE7FBBcA8",
//       blockHash: "0x876810a013dbcd140f6fd6048c1dc33abbb901f1f96b394c2fa63aef3cb40b5d",
//       blockNumber: 14578286,
//       data: "0x0000000000000000000000000000000000000000000003a12ec797b5484968c1",
//       logIndex: 42,
//       topics: [
//         "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
//         "0x00000000000000000000000039b72d136ba3e4cef35f48cd09587ffab754dd8b",
//         "0x000000000000000000000000dfd9de5f6fa60bd70636c0900752e93a6144aed4",
//       ],
//       transactionHash: "0x9014ae6ef92464338355a79e5150e542ff9a83e2323318b21f40d6a3e65b4789",
//       transactionIndex: 29,
//     },
//     {
//       address: "0x39B72d136ba3e4ceF35F48CD09587ffaB754DD8B",
//       blockHash: "0x876810a013dbcd140f6fd6048c1dc33abbb901f1f96b394c2fa63aef3cb40b5d",
//       blockNumber: 14578286,
//       data: "0x0000000000000000000000000000000000000000000003a12ec797b5484968c1",
//       logIndex: 43,
//       topics: [
//         "0x34fcbac0073d7c3d388e51312faf357774904998eeb8fca628b9e6f65ee1cbf7",
//         "0x000000000000000000000000dfd9de5f6fa60bd70636c0900752e93a6144aed4",
//         "0x0000000000000000000000000000000000000000000000000000000000000003",
//       ],
//       transactionHash: "0x9014ae6ef92464338355a79e5150e542ff9a83e2323318b21f40d6a3e65b4789",
//       transactionIndex: 29,
//     },
//   ],
//   logsBloom: "0x00000000000000000000000000000...",
//   status: 1,
//   to: "0x39B72d136ba3e4ceF35F48CD09587ffaB754DD8B",
//   transactionHash: "0x9014ae6ef92464338355a79e5150e542ff9a83e2323318b21f40d6a3e65b4789",
//   transactionIndex: 29,
//   type: 2,
//   byzantium: true,
//   confirmations: 298171,
// }

Contract

⚠️ Only read functions are currently supported. ⚠️

🧪 Contract support is experimental, do not use this in production yet. (even though earni.fi does)

Encoding support:

bool
bytes
address

Decoding support:

bool
address
uint256
bytes32
uint8
string (only if there is one string output, not multiple yet)

Assume all types outside the above types will break for now

import { Contract, jsonRpcProvider, JSONABI } from 'essential-eth';
// UNI airdrop contract
const contractAddress = '0x090D4613473dEE047c3f2706764f49E0821D256e';
const provider = jsonRpcProvider(/* RPC URL optional */);

const abi: JSONABI = [
  {
    inputs: [
      {
        internalType: 'uint256',
        name: 'index',
        type: 'uint256',
      },
    ],
    name: 'isClaimed',
    outputs: [
      {
        internalType: 'bool',
        name: '',
        type: 'bool',
      },
    ],
    stateMutability: 'view',
    type: 'function',
  },
];

const contract = new Contract(contractAddress, abi, provider);

(async () => {
  // prints boolean as to whether index 0 has claimed airdrop or not
  console.log(await contract.isClaimed(0));
})();

`contractFunctionName(args)`

Any function on a contract. Returns are the same as ethers.js, except that instead of BigNumber, essential-eth always returns a TinyBig

More Info

🧪 This repo is under active development. The API is less-fully featured than web3 and ethers. More functions added often!

👨🏻‍💻 Breaking changes will exist between minor versions until 1.0.0 (Versions go major.minor.patch)

Identical vs Similar vs Dissimilar {#isd}

Throughout the documentation for essential-eth, you may notice that some functions are compared to ethers.js and web3.js. The keywords identical, similar, and dissimilar are used to help you migrate to essential-eth. Here's a guide on what these keywords mean:

Identical -- should behave exactly like the library you're already using, except the types might be different (TinyBig vs Bn.js).
Similar -- can probably be used as a replacement to the library you're currently using, except there are some differences. Read the notes next to this keyword to see why these aren't considered identical.
Dissimilar -- should not be used in place of the function you're currently using. Read the notes next to this keyword to see why these functions aren't considered similar, and potentially learn how to alter your implementation to make essential-eth work for you.

Note: In web3.js, almost every method or function can be passed a callback. essential-eth, like ethers.js, does not include this functionality and trusts that users will rely on the much more modern promise and async/await patterns.

Miscellaneous

📓 View full docs
📓 View changelog (by looking at releases diff)
📋 View our project board

Contributing and GitPOAP

We welcome and appreciate all contributions to Essential Eth! If you're interested in helping us improve this library, please read our Contributing Guidelines to understand the types of contributions we're looking for and the process of making them.

In partnership with GitPOAP, Essential ETH wants to recognize all contributors for their contributions toward the growth of this library. More information about GitPOAP can be found on the Contributing Guidelines.

Files

readme.md

Latest commit

History

readme.md

File metadata and controls

Why you should replace Ethers.js and web3

Table of Contents

Install

🛠 Utils

Providers

Contract

contractFunctionName(args)

More Info

Identical vs Similar vs Dissimilar {#isd}

Miscellaneous

Contributing and GitPOAP

`contractFunctionName(args)`