meterify.eth

This module allows you to interact with a Meter blockchain and any deployed smart contracts on it.

Although the meterify.eth module inherits from web.eth, there are some feature differences between the two. The following is a list of extended features in meterify.eth

Extended Properties

• currentProvider

• givenProvider

Extended Methods

• getBlockRef

• getBlockUncleCount

• getChainTag

• getEnergy

Note on checksum addresses

All addresses returned by functions of this package are returned as checksum addresses. This means some letters are uppercase and some are lowercase. Based on that it will calculate a checksum for the address and prove its correctness. Incorrect checksum addresses will throw an error when passed into functions. If you want to circumvent the checksum check you can make an address all lower- or uppercase.

Checksum Example:

    meterify.eth.getAccounts(console.log);

    > ["0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe" ,"0x85F43D8a49eeB85d32Cf465507DD71d507100C1d"]

Contract

For meterify.eth.Contract see the Contract reference documentation.

accounts

For meterify.eth.accounts see the accounts reference documentation.

options

For meterify.eth.options see the options reference documentation.

getProtocolVersion

    meterify.eth.getProtocolVersion([callback])

Returns the protocol version of the node.

Example:

    meterify.eth.getProtocolVersion().then(console.log);
    > "63"

Returns:

Type	Description
Promise<string>	The protocol version.

isSyncing

    meterify.eth.isSyncing([callback])

Checks if the node is currently syncing and returns either a syncing object, or false.

Returns:

Type	Description
Promise <objectboolean>

Property	Type	Description
startingBlock	Number	The block number where the sync started.
currentBlock	Number	The block number where at which block the node currently synced to already.
highestBlock	Number	The estimated block number to sync to.
knownStates	Number	The estimated states to download
pulledStates	Number	The already downloaded states

Example:

meterify.eth.isSyncing()
    .then(console.log);

    > {
        startingBlock: 100,
        currentBlock: 312,
        highestBlock: 512,
        knownStates: 234566,
        pulledStates: 123455
    }

getCoinbase

meterify.eth.getCoinbase([callback])

Returns the Coinbase address to which mining rewards will go.

Returns:

Type	Description
Promise<string>	The Coinbase address set in the node for mining rewards.

Example:

meterify.eth.getCoinbase().then(console.log);  
> "0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe"  

isMining

meterify.eth.isMining([callback])

Checks whether the node is mining or not.

Returns:

Type	Description
Promise<boolean>	Returns true if the node is mining, otherwise false.

Example:

meterify.eth.isMining().then(console.log);    
> true

getHashrate

meterify.eth.getHashrate([callback])

Returns the number of hashes per second that the node is mining with.

Returns:

Type	Description
Promise<number>	The number of hashes per second.

Example:

meterify.eth.getHashrate().then(console.log);    
> 493736

getGasPrice

meterify.eth.getGasPrice([callback])

Returns the current gas price oracle. The gas price is determined by the last few blocks median gas price. GasPrice is the wei per unit of gas.

Returns:

Type	Description
Promise<string>	Number string of the current gas price in wei.

See the A note on dealing with big numbers in JavaScript.

Example:

    meterify.eth.getGasPrice().then(console.log);
    > "20000000000"

getAccounts

    meterify.eth.getAccounts([callback])

Will return a list of the unlocked accounts in the Web3 wallet or it will return the accounts from the currently connected node.

This means you can add accounts with meterify.eth.accounts.create() and you will get them returned here.

Returns:

Type	Description
Promise<Array>	An array of addresses controlled by node.

Example:

    meterify.eth.getAccounts().then(console.log);
    > ["0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe", "0xDCc6960376d6C6dEa93647383FfB245CfCed97Cf"]

getBlockNumber

    meterify.eth.getBlockNumber([callback])

Returns the current block number.

Returns:

Type	Description
Promise<number>	The number of the most recent block.

Example:

    meterify.eth.getBlockNumber().then(console.log);
    > 2744

getBalance

    meterify.eth.getBalance(address [, defaultBlock] [, callback])

Get the Meter MTRG balance of an address at a given block.

Property	Type	Description
address	String	The address to get the balance of.
defaultBlock	Number or String	(optional) If you pass this parameter it will not use the default block set with meterify.eth.defaultBlock.
callback	Function	(optional) Optional callback, returns an error object as first parameter and the result as second.

Returns:

Type	Description
Promise<string>	The current Meter balance for the given address in wei.

See the `A note on dealing with big numbers in JavaScript'.

Example:

    meterify.eth.getBalance("0x407d73d8a49eeb85d32cf465507dd71d507100c1").then(console.log);
    > "1000000000000"

getEnergy

    meterify.eth.getEnergy(address [, defaultBlock] [, callback])

Get the Meter MTR (energy) balance of an address at a given block.

Property	Type	Description
address	String	The address to get the balance of.
defaultBlock	Number or String	(optional) If you pass this parameter it will not use the default block set with meterify.eth.defaultBlock.
callback	Function	(optional) Optional callback, returns an error object as first parameter and the result as second.

Returns:

Type	Description
Promise<string>	The current Meter MTR balance for the given address in wei <what-is-wei>.

See the A note on dealing with big numbers in JavaScript.

Example:

    meterify.eth.getEnergy("0x407d73d8a49eeb85d32cf465507dd71d507100c1").then(console.log);
    > "1000000000000"

getStorageAt

    meterify.eth.getStorageAt(address, position [, defaultBlock] [, callback])

Get the storage at a specific position of an address.

Parameters:

Property	Type	Description
address	String	The address to get the storage from.
position	Number	The index position of the storage.
defaultBlock	Number or String	(optional) If you pass this parameter it will not use the default block set with meterify.eth.defaultBlock.
callback	Function	(optional) Optional callback, returns an error object as first parameter and the result as second.

Returns:

Type	Description
Promise<string>	The value in storage at the given position.

Example:

    meterify.eth.getStorageAt("0x407d73d8a49eeb85d32cf465507dd71d507100c1", 0).then(console.log);
    > "0x033456732123ffff2342342dd12342434324234234fd234fd23fd4f23d4234"

getCode

    meterify.eth.getCode(address [, defaultBlock] [, callback])

Get the code at a specific address.

Parameters:

Property	Type	Description
address	String	The address to get the code from.
defaultBlock	Number or String	(optional) If you pass this parameter it will not use the default block set with meterify.eth.defaultBlock.
callback	Function	(optional) Optional callback, returns an error object as first parameter and the result as second.

Returns:

Type	Description
Promise<string>	The data at given address address.

Example:

    meterify.eth.getCode("0xd5677cf67b5aa051bb40496e68ad359eb97cfbf8").then(console.log);
    > "0x600160008035811a818181146012578301005b601b6001356025565b8060005260206000f25b600060078202905091905056"

getBlock

     meterify.eth.getBlock(blockHashOrBlockNumber [, returnTransactionObjects] [, callback])

Returns a block matching the block number or block hash.

Parameters:

Property	Type	Description
blockHashOrBlockNumber	String or Number	The block number or block hash. Or the string "genesis", "latest" or "pending" as in the default block parameter.
returnTransactionObjects	Boolean	(optional, default false) If true, the returned block will contain all transactions as objects, if false it will only contains the transaction hashes.
callback	Function	(optional) Optional callback, returns an error object as first parameter and the result as second.

Returns:

Type	Description
Promise<object>	The block object.

The block object:

Property	Type	Description
number	Number	The block number. null when its pending block.
hash 32 Bytes	String	Hash of the block. null when its pending block.
parentHash 32 Bytes	String	Hash of the parent block.
nonce 8 Bytes	String	Hash of the generated proof-of-work. null when its pending block.
sha3Uncles 32 Bytes	String	SHA3 of the uncles data in the block.
logsBloom 256 Bytes	String	The bloom filter for the logs of the block. null when its pending block.
transactionsRoot 32 Bytes	String	The root of the transaction trie of the block
stateRoot 32 Bytes	String	The root of the final state trie of the block.
receiptsRoot 32 Bytes	String	Transaction receipts are used to store the state after a transaction has been executed and are kept in an index-keyed trie. The hash of its root is placed in the block header as the receipts root.
miner	String	The address of the beneficiary to whom the mining rewards were given.
difficulty	String	Integer of the difficulty for this block.
totalDifficulty	String	Integer of the total difficulty of the chain until this block.
extraData	String	The "extra data" field of this block.
size	Number	Integer the size of this block in bytes.
gasLimit	Number	The maximum gas allowed in this block.
gasUsed	Number	The total used gas by all transactions in this block.
timestamp	Number or String	The unix timestamp for when the block was collated (returns a string if a overflow got detected).
transactions	Array	Array of transaction objects, or 32 Bytes transaction hashes depending on the returnTransactionObjects parameter.
uncles	Array	Array of uncle hashes.

Example:

    meterify.eth.getBlock(3150).then(console.log);
    > {
        "number": 3,
        "hash": "0xef95f2f1ed3ca60b048b4bf67cde2195961e0bba6f70bcbea9a2c4e133e34b46",
        "parentHash": "0x2302e1c0b972d00932deb5dab9eb2982f570597d9d42504c05d9c2147eaf9c88",
        "nonce": "0xfb6e1a62d119228b",
        "sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
        "logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
        "transactionsRoot": "0x3a1b03875115b79539e5bd33fb00d8f7b7cd61929d5a3c574f507b8acf415bee",
        "stateRoot": "0xf1133199d44695dfa8fd1bcfe424d82854b5cebef75bddd7e40ea94cda515bcb",
        "receiptsRoot": '0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421',
        "miner": "0x8888f1f195afa192cfee860698584c030f4c9db1",
        "difficulty": '21345678965432',
        "totalDifficulty": '324567845321',
        "size": 616,
        "extraData": "0x",
        "gasLimit": 3141592,
        "gasUsed": 21662,
        "timestamp": 1429287689,
        "transactions": [
            "0x9fc76417374aa880d4449a1f7f31ec597f00b1f6f3dd2d66f4c9c6c445836d8b"
        ],
        "uncles": []
    }

getBlockTransactionCount

    meterify.eth.getBlockTransactionCount(blockHashOrBlockNumber [, callback])

Returns the number of transaction in a given block.

Parameters:

Property	Type	Description
blockHashOrBlockNumber	String or Number	The block number or hash. Or the string "genesis", "latest" or "pending" as in the default block parameter.
callback	Function	(optional) Optional callback, returns an error object as first parameter and the result as second.

Returns:

Type	Description
Promise<number>	The number of transactions in the given block.

Example:

    meterify.eth.getBlockTransactionCount("0x407d73d8a49eeb85d32cf465507dd71d507100c1").then(console.log);
    > 1

getUncle

    meterify.eth.getUncle(blockHashOrBlockNumber, uncleIndex [, callback])

Returns a blocks uncle by a given uncle index position.

Parameters:

Property	Type	Description
blockHashOrBlockNumber	String or Number	The block number or hash. Or the string "genesis", "latest" or "pending" as in the default block parameter.
uncleIndex	Number	The index position of the uncle.
callback	Function	(optional) Optional callback, returns an error object as first parameter and the result as second.

Returns:

Type	Description
Promise<object>	The returned uncle. For a return value see meterify.eth.getBlock().

Note: An uncle doesn't contain individual transactions.

Example:

    meterify.eth.getUncle(500, 0).then(console.log);
    > // see meterify.eth.getBlock

getTransaction

    meterify.eth.getTransaction(transactionHash [, callback])

Returns a transaction matching the given transaction hash.

Parameters:

Property	Type	Description
transactionHash	String	The transaction hash.
callback	Function	(optional) Optional callback, returns an error object as first parameter and the result as second.

Returns:

Type	Description
Promise<object>	A transaction object its hash transactionHash:

The object:

Property	Type	Description
hash 32 Bytes	String	Hash of the transaction.
nonce	Number	The number of transactions made by the sender prior to this one.
blockHash 32 Bytes	String	Hash of the block where this transaction was in. null when its pending.
blockNumber	Number	Block number where this transaction was in. null when its pending.
transactionIndex	Number	Integer of the transactions index position in the block. null when its pending.
from	String	Address of the sender.
to	String	Address of the receiver. null when its a contract creation transaction.
value	String	Value transferred in wei.
gasPrice	String	The wei per unit of gas provided by the sender in wei.
gas	Number	Gas provided by the sender.
input	String	The data sent along with the transaction.

Example:

    meterify.eth.getTransaction('0x9fc76417374aa880d4449a1f7f31ec597f00b1f6f3dd2d66f4c9c6c445836d8b§234').then(console.log);
    > {
        "hash": "0x9fc76417374aa880d4449a1f7f31ec597f00b1f6f3dd2d66f4c9c6c445836d8b",
        "nonce": 2,
        "blockHash": "0xef95f2f1ed3ca60b048b4bf67cde2195961e0bba6f70bcbea9a2c4e133e34b46",
        "blockNumber": 3,
        "transactionIndex": 0,
        "from": "0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b",
        "to": "0x6295ee1b4f6dd65047762f924ecd367c17eabf8f",
        "value": '123450000000000000',
        "gas": 314159,
        "gasPrice": '2000000000000',
        "input": "0x57cb2fc4"
    }

getPendingTransactions

    meterify.eth.getPendingTransactions([, callback])

Returns a list of pending transactions.

Parameters:

Property	Type	Description
callback	Function	(optional) Optional callback, returns an error object as first parameter and the result as second.

Returns:

Type	Description
Promise<object[]>	Array of pending transactions:

The object:

Property	Type	Description
hash 32 Bytes	String	Hash of the transaction.
nonce	Number	The number of transactions made by the sender prior to this one.
blockHash 32 Bytes	String	Hash of the block where this transaction was in. null when its pending.
blockNumber	Number	Block number where this transaction was in. null when its pending.
transactionIndex	Number	Integer of the transactions index position in the block. null when its pending.
from	String	Address of the sender.
to	String	Address of the receiver. null when its a contract creation transaction.
value	String	Value transferred in wei.
gasPrice	String	The wei per unit of gas provided by the sender in wei.
gas	Number	Gas provided by the sender.
input	String	The data sent along with the transaction.

Example:

    meterify.eth.getPendingTransactions().then(console.log);
    >  [
        {
            hash: '0x9fc76417374aa880d4449a1f7f31ec597f00b1f6f3dd2d66f4c9c6c445836d8b',
            nonce: 2,
            blockHash: '0xef95f2f1ed3ca60b048b4bf67cde2195961e0bba6f70bcbea9a2c4e133e34b46',
            blockNumber: 3,
            transactionIndex: 0,
            from: '0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b',
            to: '0x6295ee1b4f6dd65047762f924ecd367c17eabf8f',
            value: '123450000000000000',
            gas: 314159,
            gasPrice: '2000000000000',
            input: '0x57cb2fc4'
            v: '0x3d',
            r: '0xaabc9ddafffb2ae0bac4107697547d22d9383667d9e97f5409dd6881ce08f13f',
            s: '0x69e43116be8f842dcd4a0b2f760043737a59534430b762317db21d9ac8c5034'
        },....,{
            hash: '0x9fc76417374aa880d4449a1f7f31ec597f00b1f6f3dd2d66f4c9c6c445836d8b',
            nonce: 3,
            blockHash: '0xef95f2f1ed3ca60b048b4bf67cde2195961e0bba6f70bcbea9a2c4e133e34b46',
            blockNumber: 4,
            transactionIndex: 0,
            from: '0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b',
            to: '0x6295ee1b4f6dd65047762f924ecd367c17eabf8f',
            value: '123450000000000000',
            gas: 314159,
            gasPrice: '2000000000000',
            input: '0x57cb2fc4'
            v: '0x3d',
            r: '0xaabc9ddafffb2ae0bac4107697547d22d9383667d9e97f5409dd6881ce08f13f',
            s: '0x69e43116be8f842dcd4a0b2f760043737a59534430b762317db21d9ac8c5034'
        }
   ]

getTransactionFromBlock

    getTransactionFromBlock(hashStringOrNumber, indexNumber [, callback])

Returns a transaction based on a block hash or number and the transactions index position.

Parameters:

Property	Type	Description
hashStringOrNumber	String	A block number or hash. Or the string "genesis", "latest" or "pending" as in the default block parameter.
indexNumber	Number	The transactions index position.
callback	Function	(optional) Optional callback, returns an error object as first parameter and the result as second.

Returns:

Type	Description
Promise<object>	A transaction object, seemeterify.eth.getTransaction

Example:

    const transaction = meterify.eth.getTransactionFromBlock('0x4534534534', 2).then(console.log);
    > // see meterify.eth.getTransaction

getTransactionReceipt

    meterify.eth.getTransactionReceipt(hash [, callback])

Returns the receipt of a transaction by transaction hash.

Note: The receipt is not available for pending transactions and returns null.

Parameters:

Property	Type	Description
hash	String	The transaction hash.
callback	Function	(optional) Optional callback, returns an error object as first parameter and the result as second.

Returns:

Type	Description
Promise returns Object	A transaction receipt object, or null when no receipt was found:

The object:

Property	Type	Description
status	Boolean	TRUE if the transaction was successful, FALSE, if the EVM reverted the transaction.
blockHash 32 Bytes	String	Hash of the block where this transaction was in.
blockNumber	Number	Block number where this transaction was in.
transactionHash 32 Bytes	String	Hash of the transaction.
transactionIndex	Number	Integer of the transactions index position in the block.
from	String	Address of the sender.
to	String	Address of the receiver. null when its a contract creation transaction.
contractAddress	String	The contract address created, if the transaction was a contract creation, otherwise null.
cumulativeGasUsed	Number	The total amount of gas used when this transaction was executed in the block.
gasUsed	Number	The amount of gas used by this specific transaction alone.
logs	Array	Array of log objects, which this transaction generated.

Example:

    const receipt = meterify.eth.getTransactionReceipt('0x9fc76417374aa880d4449a1f7f31ec597f00b1f6f3dd2d66f4c9c6c445836d8b')
                            .then(console.log);
    > {
      "status": true,
      "transactionHash": "0x9fc76417374aa880d4449a1f7f31ec597f00b1f6f3dd2d66f4c9c6c445836d8b",
      "transactionIndex": 0,
      "blockHash": "0xef95f2f1ed3ca60b048b4bf67cde2195961e0bba6f70bcbea9a2c4e133e34b46",
      "blockNumber": 3,
      "contractAddress": "0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe",
      "cumulativeGasUsed": 314159,
      "gasUsed": 30234,
      "logs": [{
             // logs as returned by getPastLogs, etc.
         }, ...]
    }

getTransactionCount

    meterify.eth.getTransactionCount(address [, defaultBlock] [, callback])

Get the numbers of transactions sent from this address.

Parameters:

Property	Type	Description
address	String	The address to get the numbers of transactions from.
defaultBlock	Number or String	(optional) If you pass this parameter it will not use the default block set with meterify.eth.defaultBlock.
callback	Function	(optional) Optional callback, returns an error object as first parameter and the result as second.

Returns:

Type	Description
Promise<number>	The number of transactions sent from the given address.

Example:

    meterify.eth.getTransactionCount("0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe").then(console.log);
    > 1

sendTransaction

meterify.eth.sendTransaction(transactionObject [, callback])

Sends a transaction to the network.

Parameters:

Property	Type	Description
transactionObject	Object	The transaction object to send.
callback	Function	(optional) Optional callback, returns an error object as first parameter and the result as second.

The transactionObject

Property	Type	Description
from	String or Number	The address for the sending account. Uses the meterify.eth.defaultAccount property, if not specified. Or an address or index of a local wallet in meterify.eth.accounts.wallet.
to	String	(optional) The destination address of the message, left undefined for a contract-creation transaction.
value	Number, String, BN, or BigNumber	(optional) The value transferred for the transaction in wei, also the endowment if it's a contract-creation transaction.
gas	Number	(optional, default: To-Be-Determined) The amount of gas to use for the transaction (unused gas is refunded).
gasPrice	Number, String, BN, or BigNumber	(optional) The price of gas for this transaction in wei, defaults to meterify.eth.gasPrice.
data	String	(optional) Either a ABI byte string <http://solidity.readthedocs.io/en/latest/abi-spec.html>_ containing the data of the function call on a contract, or in the case of a contract-creation transaction the initialization code.
nonce	Number	(optional) Integer of a nonce. This allows to overwrite your own pending transactions that use the same nonce.

Note: The from property can also be an address or index from the meterify.eth.accounts.wallet. It will then sign locally using the private key of that account, and send the transaction via meterify.eth.sendSignedTransaction().

Returns:

The callback will return the 32 bytes transaction hash.

Name	Description
PromiEvent	A promise combined event emitter. Will be resolved when the transaction receipt is available. Additionally the following events are available:

Event	Returns	Description
"transactionHash"	String	Is fired right after the transaction is sent and a transaction hash is available.
"receipt"	Object	Is fired when the transaction receipt is available.
"confirmation"	Number, Object	Is fired for every confirmation up to the 12th confirmation. Receives the confirmation number as the first and the receipt as the second argument. Fired from confirmation 0 on, which is the block where it's mined.
"error"	Error	Is fired if an error occurs during sending. If a out of gas error, the second parameter is the receipt.

Example:

// compiled solidity source code using https://remix.ethereum.org
    const code = "603d80600c6000396000f3007c01000000000000000000000000000000000000000000000000000000006000350463c6888fa18114602d57005b6007600435028060005260206000f3";

    // using the callback
    meterify.eth.sendTransaction({
        from: '0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe',
        data: code // deploying a contract
    }, function(error, hash){
        ...
    });

    // using the promise
    meterify.eth.sendTransaction({
        from: '0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe',
        to: '0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe',
        value: '1000000000000000'
    })
    .then(function(receipt){
        ...
    });

    // using the event emitter
    meterify.eth.sendTransaction({
        from: '0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe',
        to: '0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe',
        value: '1000000000000000'
    })
    .on('transactionHash', function(hash){
        ...
    })
    .on('receipt', function(receipt){
        ...
    })
    .on('confirmation', function(confirmationNumber, receipt){ ... })
    .on('error', console.error); // If a out of gas error, the second parameter is the receipt.

sendSignedTransaction

meterify.eth.sendSignedTransaction(signedTransactionData [, callback])

Sends an already signed transaction, generated for example using meterify.eth.accounts.signTransaction.

Parameters:

Property	Type	Description
signedTransactionData	String	Signed transaction data in HEX format
callback	Function	(optional) Optional callback, returns an error object as first parameter and the result as second.

Returns:

Name	Returns	Description
PromiEvent	A promise combined event emitter	Will be resolved when the transaction receipt is available.

Please see the return values for meterify.eth.sendTransaction for details.

Example:

    const Tx = require('ethereumjs-tx');
    const privateKey = new Buffer('e331b6d69882b4cb4ea581d88e0b604039a3de5967688d3dcffdd2270c0fd109', 'hex')

    const rawTx = {
      nonce: '0x00',
      gasPrice: '0x09184e72a000',
      gasLimit: '0x2710',
      to: '0x0000000000000000000000000000000000000000',
      value: '0x00',
      data: '0x7f7465737432000000000000000000000000000000000000000000000000000000600057'
    }

    const tx = new Tx(rawTx);
    tx.sign(privateKey);

    const serializedTx = tx.serialize();

    // console.log(serializedTx.toString('hex'));
    // 0xf889808609184e72a00082271094000000000000000000000000000000000000000080a47f74657374320000000000000000000000000000000000000000000000000000006000571ca08a8bbf888cfa37bbf0bb965423625641fc956967b81d12e23709cead01446075a01ce999b56a8a88504be365442ea61239198e23d1fce7d00fcfc5cd3b44b7215f

    meterify.eth.sendSignedTransaction('0x' + serializedTx.toString('hex'))
    .on('receipt', console.log);

    > // see eth.getTransactionReceipt() for details

sign

    meterify.eth.sign(dataToSign, address [, callback])

Signs data using a specific account. This account needs to be unlocked.

Parameters:

Property	Type	Description
dataToSign	String	Data to sign. If String it will be converted using meterify.utils.utf8ToHex.
address	String or Number	Address to sign data with. Or an address or index of a local wallet in meterify.eth.accounts.wallet.
callback	Function	(optional) Optional callback, returns an error object as first parameter and the result as second.

Note: The 2. address parameter can also be an address or index from the meterify.eth.accounts.wallet. It will then sign locally using the private key of this account.

Returns:

Type	Description
Promise<string>	The signature.

Example:

    meterify.eth.sign("Hello world", "0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe")
    .then(console.log);
    > "0x30755ed65396facf86c53e6217c52b4daebe72aa4941d89635409de4c9c7f9466d4e9aaec7977f05e923889b33c0d0dd27d7226b6e6f56ce737465c5cfd04be400"

    // the below is the same
    meterify.eth.sign(meterify.utilsutf8ToHex("Hello world"), "0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe")
    .then(console.log);
    > "0x30755ed65396facf86c53e6217c52b4daebe72aa4941d89635409de4c9c7f9466d4e9aaec7977f05e923889b33c0d0dd27d7226b6e6f56ce737465c5cfd04be400"

signTransaction

    meterify.eth.signTransaction(transactionObject [, address,] [, callback])

Signs a transaction with the private key of the given address. If the given address is a local unlocked account, the transaction will be signed locally.

Parameters:

Property	Type	Description
transactionObject	Object	The transaction data to sign meterify.eth.sendTransaction() for more.
address	string	The address of the account.
callback	Function	(optional) Optional callback, returns an error object as first parameter and the result as second.

Returns:

Type	Description
Promise<object>	The RLP encoded transaction. The raw property can be used to send the transaction using meterify.eth.sendSignedTransaction.

Example:

    meterify.eth.signTransaction({
        from: "0xEB014f8c8B418Db6b45774c326A0E64C78914dC0",
        gasPrice: "20000000000",
        gas: "21000",
        to: '0x3535353535353535353535353535353535353535',
        value: "1000000000000000000",
        data: ""
    }).then(console.log);
    > {
        raw: '0xf86c808504a817c800825208943535353535353535353535353535353535353535880de0b6b3a76400008025a04f4c17305743700648bc4f6cd3038ec6f6af0df73e31757007b7f59df7bee88da07e1941b264348e80c78c4027afc65a87b0a5e43e86742b8ca0823584c6788fd0',
        tx: {
            nonce: '0x0',
            gasPrice: '0x4a817c800',
            gas: '0x5208',
            to: '0x3535353535353535353535353535353535353535',
            value: '0xde0b6b3a7640000',
            input: '0x',
            v: '0x25',
            r: '0x4f4c17305743700648bc4f6cd3038ec6f6af0df73e31757007b7f59df7bee88d',
            s: '0x7e1941b264348e80c78c4027afc65a87b0a5e43e86742b8ca0823584c6788fd0',
            hash: '0xda3be87732110de6c1354c83770aae630ede9ac308d9f7b399ecfba23d923384'
        }
    }

call

    meterify.eth.call(callObject [, defaultBlock] [, callback])

Executes a message call transaction, which is directly executed in the VM of the node, but never mined into the blockchain.

Parameters:

Property	Type	Description
callObject	Object	A transaction object see meterify.eth.sendTransaction, with the difference that for calls the from property is optional as well.
defaultBlock	Number or String	(optional) If you pass this parameter it will not use the default block set with meterify.eth.defaultBlock.
callback	Function	(optional) Optional callback, returns an error object as first parameter and the result as second.

Returns:

Type	Description
Promise<string>	The returned data of the call, e.g. a smart contract functions return value.

Example:

    meterify.eth.call({
        to: "0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe", // contract address
        data: "0xc6888fa10000000000000000000000000000000000000000000000000000000000000003"
    }).then(console.log);
    > "0x000000000000000000000000000000000000000000000000000000000000000a"

estimateGas

    meterify.eth.estimateGas(callObject [, callback])

Executes a message call or transaction and returns the amount of the gas used.

Parameters:

Property	Type	Description
callObject	Object	A transaction object see meterify.eth.sendTransaction, with the difference that for calls the from property is optional as well.
callback	Function	(optional) Optional callback, returns an error object as first parameter and the result as second.

Returns:

Type	Description
Promise<number>	The used gas for the simulated call/transaction.

Example:

    meterify.eth.estimateGas({
        to: "0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe",
        data: "0xc6888fa10000000000000000000000000000000000000000000000000000000000000003"
    }).then(console.log);
    > "0x0000000000000000000000000000000000000000000000000000000000000015"

getPastLogs

    meterify.eth.getPastLogs(options [, callback])

Gets past logs, matching the given options.

Parameters:

Property	Type	Description
options	Object	The filter options as follows:
callback	Function	(optional) Optional callback,

The options object:

Property	Type	Description
fromBlock	Number or String	The number of the earliest block ("latest" may be given to mean the most recent and "pending" currently mining, block). By default "latest".
toBlock	Number or String	The number of the latest block ("latest" may be given to mean the most recent and "pending" currently mining, block). By default "latest".
address	String or Array	An address or a list of addresses to only get logs from particular account(s).
topics	Array	An array of values which must each appear in the log entries. The order is important, if you want to leave topics out use null, e.g. [null, '0x12...']. You can also pass an array for each topic with options for that topic e.g. [null, ['option1', 'option2']]

Returns:

Type	Description
Promise<Array>	Array of log objects.

The structure of the returned event Object in the Array looks as follows:

Name	Type	Description
address	String	From which this event originated from.
data	String	The data containing non-indexed log parameter.
topics	Array	An array with max 4 32 Byte topics, topic 1-3 contains indexed parameters of the log.
logIndex	Number	Integer of the event index position in the block.
transactionIndex	Number	Integer of the transaction's index position, the event was created in.
transactionHash 32 Bytes	String	Hash of the transaction this event was created in.
blockHash 32 Bytes	String	Hash of the block where this event was created in. null when its still pending.
blockNumber	Number	The block number where this log was created in. null when still pending.

Example:

    meterify.eth.getPastLogs({
        address: "0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe",
        topics: ["0x033456732123ffff2342342dd12342434324234234fd234fd23fd4f23d4234"]
    }).then(console.log);
    > [{
        data: '0x7f9fade1c0d57a7af66ab4ead79fade1c0d57a7af66ab4ead7c2c2eb7b11a91385',
        topics: ['0xfd43ade1c09fade1c0d57a7af66ab4ead7c2c2eb7b11a91ffdd57a7af66ab4ead7', '0x7f9fade1c0d57a7af66ab4ead79fade1c0d57a7af66ab4ead7c2c2eb7b11a91385']
        logIndex: 0,
        transactionIndex: 0,
        transactionHash: '0x7f9fade1c0d57a7af66ab4ead79fade1c0d57a7af66ab4ead7c2c2eb7b11a91385',
        blockHash: '0xfd43ade1c09fade1c0d57a7af66ab4ead7c2c2eb7b11a91ffdd57a7af66ab4ead7',
        blockNumber: 1234,
        address: '0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe'
    },{...}]

getWork

    meterify.eth.getWork([callback])

Gets work for miners to mine on. Returns the hash of the current block, the seedHash, and the boundary condition to be met ("target").

Parameters:

Property	Type	Description
callback	Function	(optional) Optional callback, returns an error object as first parameter and the result as second.

Returns:

Type	Description
Promise<Array>	The mining work with the following structure:

Type	Description
String 32 Bytes - at index 0	current block header pow-hash
String 32 Bytes - at index 1	the seed hash used for the DAG.
String 32 Bytes - at index 2	the boundary condition ("target"), 2^256 / difficulty.

Example:

    meterify.eth.getWork().then(console.log);
    > [
      "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
      "0x5EED00000000000000000000000000005EED0000000000000000000000000000",
      "0xd1ff1c01710000000000000000000000d1ff1c01710000000000000000000000"
    ]

submitWork

    meterify.eth.submitWork(nonce, powHash, digest, [callback])

Used for submitting a proof-of-work solution.

Parameters:

Property	Type	Description
nonce	String 8 Bytes	The nonce found (64 bits)
powHash	String 32 Bytes	The header's pow-hash (256 bits)
digest	String 32 Bytes	The mix digest (256 bits)
callback	Function	(optional) Optional callback, returns an error object as first parameter and the result as second.

Returns:

Type	Description
Promise<boolean>	Returns true if the provided solution is valid, otherwise false.

Example:

    meterify.eth.submitWork([
        "0x0000000000000001",
        "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
        "0xD1FE5700000000000000000000000000D1FE5700000000000000000000000000"
    ])
    .then(console.log);
    > true

requestAccounts

    meterify.eth.requestAccounts([callback])

This method will request/enable the accounts from the current environment it is running (Metamask, Status or Mist). It doesn't work if you're connected to a node with a default Web3.js provider (WebsocketProvider, HttpProvidder and IpcProvider). This method will only work if you're using the injected provider from an application like Status, Mist or Metamask.

For further information about the behavior of this method please read the EIP of it: EIP-1102

Parameters:

Property	Type	Description
callback	Function	(optional) Optional callback, returns an error object as first parameter and the result as second.

Returns:

Type	Description
Promise<Array>	Returns an array of enabled accounts.

Example:

    meterify.eth.requestAccounts().then(console.log);
    > ['0aae0B295369a9FD31d5F28D9Ec85E40f4cb692BAf', 0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe]

getChainId

    meterify.eth.getChainId([callback])

Returns the chain ID of the current connected node as described in EIP-695.

Returns:

Type	Description
Promise<Number>	Returns chain ID.

Example:

    meterify.eth.getChainId().then(console.log);
    > 61

getNodeInfo

    meterify.eth.getNodeInfo([callback])

Returns:

Type	Description
Promise<String>	The current client version.

Example:

    meterify.eth.getNodeInfo().then(console.log);
    > "Mist/v0.9.3/darwin/go1.4.1"

getProof

    meterify.eth.getProof(address, storageKey, blockNumber, [callback])

Returns the account and storage-values of the specified account including the Merkle-proof as described in EIP-1186.

Parameters:

Property	Type	Description
address	String 20 Bytes	The Address of the account or contract.
storageKey	Array 32 Bytes	Array of storage-keys which should be proofed and included. See meterify.eth.getStorageAt.
blockNumber	Number or String or "latest" or "earliest"	Integer block number, or the string "latest" or "earliest".
callback	Function	(optional) Optional callback, returns an error object as first parameter and the result as second.

Returns:

Type	Description
Promise<Object>	A account object.

The account object:

Property	Description
balance	The balance of the account. See meterify.eth.getBalance.
codeHash	Hash of the code of the account. For a simple Account without code it will return "0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470"
nonce	Nonce of the account.
storageHash	SHA3 of the StorageRoot. All storage will deliver a MerkleProof starting with this rootHash.
accountProof	Array of rlp-serialized MerkleTree-Nodes, starting with the stateRoot-Node, following the path of the SHA3 (address) as key.
storageProof	Array of storage-entries as requested.
key	The requested storage key.
value	The storage value.

Example:

    meterify.eth.getProof(
        "0x1234567890123456789012345678901234567890",
        ["0x0000000000000000000000000000000000000000000000000000000000000000","0x0000000000000000000000000000000000000000000000000000000000000001"],
        "latest"
    ).then(console.log);
    > {
        "address": "0x1234567890123456789012345678901234567890",
        "accountProof": [
            "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",
            "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",
            "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",
            "0xf851808080a009833150c367df138f1538689984b8a84fc55692d3d41fe4d1e5720ff5483a6980808080808080808080a0a319c1c415b271afc0adcb664e67738d103ac168e0bc0b7bd2da7966165cb9518080"
            ],
            "balance": 0,
            "codeHash": "0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470",
            "nonce": 0,
            "storageHash": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
            "storageProof": [
            {
                "key": "0x0000000000000000000000000000000000000000000000000000000000000000",
                "value": '0',
                "proof": []
            },
            {
                "key": "0x0000000000000000000000000000000000000000000000000000000000000001",
                "value": '0',
                "proof": []
            }
        ]
    }