Web3.js 中文Api文档
.. _eth:
======== web3.eth
The web3-eth package allows you to interact with an Ethereum blockchain and Ethereum smart contracts.
var Eth = require('web3-eth');
// "Eth.providers.givenProvider" will be set if in an Ethereum supported browser.
var eth = new Eth(Eth.givenProvider || 'ws://some.local-or-remote.node:8546');
// or using the web3 umbrella package
var Web3 = require('web3');
var web3 = new Web3(Web3.givenProvider || 'ws://some.local-or-remote.node:8546');
// -> web3.eth
Note on checksum addresses
All Ethereum 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.
例子
web3.eth.getAccounts(console.log);
> ["0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe" ,"0x85F43D8a49eeB85d32Cf465507DD71d507100C1d"]
subscribe
For web3.eth.subscribe see the :ref:Subscribe reference documentation <eth-subscribe>.
Contract
For web3.eth.Contract see the :ref:Contract reference documentation <eth-contract>.
Iban
For web3.eth.Iban see the :ref:Iban reference documentation <eth-iban>.
personal
For web3.eth.personal see the :ref:personal reference documentation <eth-personal>.
accounts
For web3.eth.accounts see the :ref:accounts reference documentation <eth-accounts>.
ens
For web3.eth.ens see the :ref:ENS reference documentation <eth-ens>.
abi
For web3.eth.abi see the :ref:ABI reference documentation <eth-abi>.
net
For web3.eth.net see the :ref:net reference documentation <eth-net>.
.. include:: include_package-core.rst
.. _eth-defaultaccount
defaultAccount
web3.eth.defaultAccount
This default address is used as the default "from" property, if no "from" property is specified in for the following methods:
- :ref:
web3.eth.sendTransaction() <eth-sendtransaction> - :ref:
web3.eth.call() <eth-call> - :ref:
new web3.eth.Contract() -> myContract.methods.myMethod().call() <eth-contract-call> - :ref:
new web3.eth.Contract() -> myContract.methods.myMethod().send() <eth-contract-send>
Property
String - 20 Bytes: Any ethereum address. You should have the private key for that address in your node or keystore. (Default is undefined)
例子
web3.eth.defaultAccount;
> undefined
// set the default account
web3.eth.defaultAccount = '0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe';
.. _eth-defaultblock:
defaultBlock
web3.eth.defaultBlock
The default block is used for certain methods. You can override it by passing in the defaultBlock as last parameter.
The default value is "latest".
- :ref:
web3.eth.getBalance() <eth-getbalance> - :ref:
web3.eth.getCode() <eth-getcode> - :ref:
web3.eth.getTransactionCount() <eth-gettransactioncount> - :ref:
web3.eth.getStorageAt() <eth-getstorageat> - :ref:
web3.eth.call() <eth-call> - :ref:
new web3.eth.Contract() -> myContract.methods.myMethod().call() <eth-contract-call>
Property
Default block parameters can be one of the following:
Number|BN|BigNumber: A block number"earliest"-String: The genesis block"latest"-String: The latest block (current head of the blockchain)"pending"-String: The currently mined block (including pending transactions)
Default is "latest"
例子
web3.eth.defaultBlock;
> "latest"
// set the default block
web3.eth.defaultBlock = 231;
.. _eth-defaulthardfork:
defaultHardfork
web3.eth.defaultHardfork
The default hardfork property is used for signing transactions locally.
Property
The default hardfork property can be one of the following:
"chainstart"-String"homestead"-String"dao"-String"tangerineWhistle"-String"spuriousDragon"-String"byzantium"-String"constantinople"-String"petersburg"-String"istanbul"-String
Default is "petersburg"
例子
web3.eth.defaultHardfork;
> "petersburg"
// set the default block
web3.eth.defaultHardfork = 'istanbul';
.. _eth-defaultchain:
defaultChain
web3.eth.defaultChain
The default chain property is used for signing transactions locally.
Property
The default chain property can be one of the following:
"mainnet"-String"goerli"-String"kovan"-String"rinkeby"-String"ropsten"-String
Default is "mainnet"
例子
web3.eth.defaultChain;
> "mainnet"
// set the default chain
web3.eth.defaultChain = 'goerli';
.. _eth-defaultcommon:
defaultCommon
web3.eth.defaultCommon
The default common property is used for signing transactions locally.
Property
The default common property does contain the following Common object:
customChain-Object: The custom chain propertiesname-string: (optional) The name of the chainnetworkId-number: Network ID of the custom chainchainId-number: Chain ID of the custom chain
baseChain-string: (optional)mainnet,goerli,kovan,rinkeby, orropstenhardfork-string: (optional)chainstart,homestead,dao,tangerineWhistle,spuriousDragon,byzantium,constantinople,petersburg, oristanbul
Default is undefined.
例子
web3.eth.defaultCommon;
> {customChain: {name: 'custom-network', chainId: 1, networkId: 1}, baseChain: 'mainnet', hardfork: 'petersburg'}
// set the default common
web3.eth.defaultCommon = {customChain: {name: 'custom-network', chainId: 1, networkId: 1}, baseChain: 'mainnet', hardfork: 'petersburg'};
.. _web3-module-transactionblocktimeout:
transactionBlockTimeout
web3.eth.transactionBlockTimeout
The transactionBlockTimeout is used over socket-based connections. This option defines the amount of new blocks it should wait until the first confirmation happens, otherwise the PromiEvent rejects with a timeout error.
返回值
number: The current value of transactionBlockTimeout (default: 50)
例子
web3.eth.transactionBlockTimeout;
> 50
// set the transaction block timeout
web3.eth.transactionBlockTimeout = 100;
.. _web3-module-transactionconfirmationblocks:
transactionConfirmationBlocks
web3.eth.transactionConfirmationBlocks
This defines the number of blocks it requires until a transaction is considered confirmed.
返回值
number: The current value of transactionConfirmationBlocks (default: 24)
例子
web3.eth.transactionConfirmationBlocks;
> 24
// set the transaction confirmations blocks
web3.eth.transactionConfirmationBlocks = 50;
.. _web3-module-transactionpollingtimeout:
transactionPollingTimeout
web3.eth.transactionPollingTimeout
The transactionPollingTimeout is used over HTTP connections. This option defines the number of seconds Web3 will wait for a receipt which confirms that a transaction was mined by the network. Note: If this method times out, the transaction may still be pending.
返回值
number: The current value of transactionPollingTimeout (default: 750)
例子
web3.eth.transactionPollingTimeout;
> 750
// set the transaction polling timeout
web3.eth.transactionPollingTimeout = 1000;
.. _web3-module-handlerevert:
handleRevert
web3.eth.handleRevert
The handleRevert options property defaults to false and returns the revert reason string if enabled for the following methods:
- :ref:
web3.eth.call() <eth-call> - :ref:
web3.eth.sendTransaction() <eth-sendtransaction> - :ref:
contract.methods.myMethod(...).send(...) <contract-send> - :ref:
contract.methods.myMethod(...).call(...) <contract-call>
.. note:: The revert reason string and signature exist as a property on the returned error.
返回值
boolean: The current value of handleRevert (default: false)
例子
web3.eth.handlRevert;
> false
// turn revert handling on
web3.eth.handleRevert = true;
.. _web3-module-maxListenersWarningThreshold:
maxListenersWarningThreshold
web3.eth.maxListenersWarningThreshold
This defines the threshold above which a warning about the number of event listeners
attached to a provider which supports sockets subscriptions will be written to the console.
You may see this warning if you call setProvider on large numbers of Web3 contract objects.
返回值
number: The current value of maxListenersWarningThreshold (default: 100)
例子
web3.eth.maxListenersWarningThreshold;
> 100
// set the max listeners warning threshold
web3.eth.maxListenersWarningThreshold = 200;
getProtocolVersion
web3.eth.getProtocolVersion([callback])
Returns the ethereum protocol version of the node.
返回值
Promise returns String: the protocol version.
例子
web3.eth.getProtocolVersion()
.then(console.log);
> "63"
isSyncing
web3.eth.isSyncing([callback])
Checks if the node is currently syncing and returns either a syncing object, or false.
.. _eth-issyncing-return:
返回值
Promise returns Object|Boolean - A sync object when the node is currently syncing or false:
- `startingBlock` - `Number`: The block number where the sync started.
- `currentBlock` - `Number`: The block number where the node is currently synced to.
- `highestBlock` - `Number`: The estimated block number to sync to.
- `knownStates` - `Number`: The number of estimated states to download.
- `pulledStates` - `Number`: The number of already downloaded states.
例子
web3.eth.isSyncing()
.then(console.log);
> {
startingBlock: 100,
currentBlock: 312,
highestBlock: 512,
knownStates: 234566,
pulledStates: 123455
}
getCoinbase
getCoinbase([callback])
Returns the coinbase address to which mining rewards will go.
返回值
Promise returns String - bytes 20: The coinbase address set in the node for mining rewards.
例子
web3.eth.getCoinbase()
.then(console.log);
> "0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe"
isMining
web3.eth.isMining([callback])
Checks whether the node is mining or not.
返回值
Promise returns Boolean: true if the node is mining, otherwise false.
例子
web3.eth.isMining()
.then(console.log);
> true
getHashrate
web3.eth.getHashrate([callback])
Returns the number of hashes per second that the node is mining with.
返回值
Promise returns Number: Number of hashes per second.
例子
web3.eth.getHashrate()
.then(console.log);
> 493736
.. _eth-gasprice:
getGasPrice
web3.eth.getGasPrice([callback])
Returns the current gas price oracle. The gas price is determined by the last few blocks median gas price.
返回值
Promise returns String - Number string of the current gas price in :ref:wei <what-is-wei>.
See the :ref:A note on dealing with big numbers in JavaScript <utils-bn>.
例子
web3.eth.getGasPrice()
.then(console.log);
> "20000000000"
getAccounts
web3.eth.getAccounts([callback])
Returns a list of accounts the node controls.
返回值
Promise returns Array - An array of addresses controlled by node.
例子
web3.eth.getAccounts()
.then(console.log);
> ["0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe", "0xDCc6960376d6C6dEa93647383FfB245CfCed97Cf"]
getBlockNumber
web3.eth.getBlockNumber([callback])
Returns the current block number.
返回值
Promise returns Number - The number of the most recent block.
例子
web3.eth.getBlockNumber()
.then(console.log);
> 2744
getBalance
web3.eth.getBalance(address [, defaultBlock] [, callback])
Get the balance of an address at a given block.
参数
String- The address to get the balance of.Number|String|BN|BigNumber- (optional) If you pass this parameter it will not use the default block set with :ref:web3.eth.defaultBlock <eth-defaultblock>. Pre-defined block numbers as"earliest","latest"and"pending"can also be used.Function- (optional) Optional callback, returns an error object as first parameter and the result as second.
返回值
Promise returns String - The current balance for the given address in :ref:wei <what-is-wei>.
See the :ref:A note on dealing with big numbers in JavaScript <big-numbers-in-javascript>.
例子
web3.eth.getBalance("0x407d73d8a49eeb85d32cf465507dd71d507100c1")
.then(console.log);
> "1000000000000"
getStorageAt
web3.eth.getStorageAt(address, position [, defaultBlock] [, callback])
Get the storage at a specific position of an address.
参数
String- The address to get the storage from.Number|String|BN|BigNumber- The index position of the storage.Number|String|BN|BigNumber- (optional) If you pass this parameter it will not use the default block set with :ref:web3.eth.defaultBlock <eth-defaultblock>. Pre-defined block numbers as"earliest","latest"and"pending"can also be used.Function- (optional) Optional callback, returns an error object as first parameter and the result as second.
返回值
Promise returns String - The value in storage at the given position.
例子
web3.eth.getStorageAt("0x407d73d8a49eeb85d32cf465507dd71d507100c1", 0)
.then(console.log);
> "0x033456732123ffff2342342dd12342434324234234fd234fd23fd4f23d4234"
getCode
web3.eth.getCode(address [, defaultBlock] [, callback])
Get the code at a specific address.
参数
String- The address to get the code from.Number|String|BN|BigNumber- (optional) If you pass this parameter it will not use the default block set with :ref:web3.eth.defaultBlock <eth-defaultblock>. Pre-defined block numbers as"earliest","latest"and"pending"can also be used.Function- (optional) Optional callback, returns an error object as first parameter and the result as second.
返回值
Promise returns String - The data at given address address.
例子
web3.eth.getCode("0xd5677cf67b5aa051bb40496e68ad359eb97cfbf8")
.then(console.log);
> "0x600160008035811a818181146012578301005b601b6001356025565b8060005260206000f25b600060078202905091905056"
.. _eth-getblock:
getBlock
web3.eth.getBlock(blockHashOrBlockNumber [, returnTransactionObjects] [, callback])
Returns a block matching the block number or block hash.
参数
String|Number|BN|BigNumber- The block number or block hash. Or the string"earliest","latest"or"pending"as in the :ref:default block parameter <eth-defaultblock>.Boolean- (optional, defaultfalse) If specifiedtrue, the returned block will contain all transactions as objects. Iffalseit will only contains the transaction hashes.Function- (optional) Optional callback, returns an error object as first parameter and the result as second.
返回值
Promise returns Object - The block object:
number-Number: The block number.nullif a pending block.hash32 Bytes -String: Hash of the block.nullif a pending block.parentHash32 Bytes -String: Hash of the parent block.nonce8 Bytes -String: Hash of the generated proof-of-work.nullif a pending block.sha3Uncles32 Bytes -String: SHA3 of the uncles data in the block.logsBloom256 Bytes -String: The bloom filter for the logs of the block.nullif a pending block.transactionsRoot32 Bytes -String: The root of the transaction trie of the block.stateRoot32 Bytes -String: The root of the final state trie of the block.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: The unix timestamp for when the block was collated.transactions-Array: Array of transaction objects, or 32 Bytes transaction hashes depending on thereturnTransactionObjectsparameter.uncles-Array: Array of uncle hashes.
例子
web3.eth.getBlock(3150)
.then(console.log);
> {
"number": 3,
"hash": "0xef95f2f1ed3ca60b048b4bf67cde2195961e0bba6f70bcbea9a2c4e133e34b46",
"parentHash": "0x2302e1c0b972d00932deb5dab9eb2982f570597d9d42504c05d9c2147eaf9c88",
"nonce": "0xfb6e1a62d119228b",
"sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
"logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
"transactionsRoot": "0x3a1b03875115b79539e5bd33fb00d8f7b7cd61929d5a3c574f507b8acf415bee",
"stateRoot": "0xf1133199d44695dfa8fd1bcfe424d82854b5cebef75bddd7e40ea94cda515bcb",
"miner": "0x8888f1f195afa192cfee860698584c030f4c9db1",
"difficulty": '21345678965432',
"totalDifficulty": '324567845321',
"size": 616,
"extraData": "0x",
"gasLimit": 3141592,
"gasUsed": 21662,
"timestamp": 1429287689,
"transactions": [
"0x9fc76417374aa880d4449a1f7f31ec597f00b1f6f3dd2d66f4c9c6c445836d8b"
],
"uncles": []
}
getBlockTransactionCount
web3.eth.getBlockTransactionCount(blockHashOrBlockNumber [, callback])
Returns the number of transaction in a given block.
参数
String|Number|BN|BigNumber- The block number or hash. Or the string"earliest","latest"or"pending"as in the :ref:default block parameter <eth-defaultblock>.Function- (optional) Optional callback, returns an error object as first parameter and the result as second.
返回值
Promise returns Number - The number of transactions in the given block.
例子
web3.eth.getBlockTransactionCount("0x407d73d8a49eeb85d32cf465507dd71d507100c1")
.then(console.log);
> 1
getBlockUncleCount
web3.eth.getBlockUncleCount(blockHashOrBlockNumber [, callback])
Returns the number of uncles in a block from a block matching the given block hash.
参数
String|Number|BN|BigNumber- The block number or hash. Or the string"earliest","latest"or"pending"as in the :ref:default block parameter <eth-defaultblock>.Function- (optional) Optional callback, returns an error object as first parameter and the result as second.
返回值
Promise returns Number - The number of transactions in the given block.
例子
web3.eth.getBlockUncleCount("0x407d73d8a49eeb85d32cf465507dd71d507100c1")
.then(console.log);
> 1
getUncle
web3.eth.getUncle(blockHashOrBlockNumber, uncleIndex [, returnTransactionObjects] [, callback])
Returns a blocks uncle by a given uncle index position.
参数
String|Number|BN|BigNumber- The block number or hash. Or the string"earliest","latest"or"pending"as in the :ref:default block parameter <eth-defaultblock>.Number- The index position of the uncle.Boolean- (optional, defaultfalse) If specifiedtrue, the returned block will contain all transactions as objects. By default it isfalseso, there is no need to explictly specify false. And, iffalseit will only contains the transaction hashes.Function- (optional) Optional callback, returns an error object as first parameter and the result as second.
返回值
Promise returns Object - the returned uncle. For a return value see :ref:web3.eth.getBlock() <eth-getblock>.
.. note:: An uncle doesn’t contain individual transactions.
例子
web3.eth.getUncle(500, 0)
.then(console.log);
> // see web3.eth.getBlock
getTransaction
web3.eth.getTransaction(transactionHash [, callback])
Returns a transaction matching the given transaction hash.
参数
String- The transaction hash.Function- (optional) Optional callback, returns an error object as first parameter and the result as second.
.. _eth-gettransaction-return:
返回值
Promise returns Object - A transaction object its hash transactionHash:
hash32 Bytes -String: Hash of the transaction.nonce-Number: The number of transactions made by the sender prior to this one.blockHash32 Bytes -String: Hash of the block where this transaction was in.nullif pending.blockNumber-Number: Block number where this transaction was in.nullif pending.transactionIndex-Number: Integer of the transactions index position in the block.nullif pending.from-String: Address of the sender.to-String: Address of the receiver.nullif it’s a contract creation transaction.value-String: Value transferred in :ref:wei <what-is-wei>.gasPrice-String: Gas price provided by the sender in :ref:wei <what-is-wei>.gas-Number: Gas provided by the sender.input-String: The data sent along with the transaction.
例子
web3.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"
}
.. _eth-getpendingtransactions:
getPendingTransactions
web3.eth.getPendingTransactions([, callback])
Returns a list of pending transactions.
参数
Function- (optional) Optional callback, returns an error object as first parameter and the result as second.
.. _eth-getpendingtransactions-return:
返回值
Promise<object[]> - Array of pending transactions:
hash32 Bytes -String: Hash of the transaction.nonce-Number: The number of transactions made by the sender prior to this one.blockHash32 Bytes -String: Hash of the block where this transaction was in.nullif pending.blockNumber-Number: Block number where this transaction was in.nullif pending.transactionIndex-Number: Integer of the transactions index position in the block.nullif pending.from-String: Address of the sender.to-String: Address of the receiver.nullwhen it’s a contract creation transaction.value-String: Value transferred in :ref:wei <what-is-wei>.gasPrice-String: The wei per unit of gas provided by the sender in :ref:wei <what-is-wei>.gas-Number: Gas provided by the sender.input-String: The data sent along with the transaction.
例子
web3.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 transaction’s index position.
参数
String|Number|BN|BigNumber- A block number or hash. Or the string"earliest","latest"or"pending"as in the :ref:default block parameter <eth-defaultblock>.Number- The transaction’s index position.Function- (optional) Optional callback, returns an error object as first parameter and the result as second.
返回值
Promise returns Object - A transaction object, see :ref:web3.eth.getTransaction <eth-gettransaction-return>:
例子
var transaction = web3.eth.getTransactionFromBlock('0x4534534534', 2)
.then(console.log);
> // see web3.eth.getTransaction
getTransactionReceipt
web3.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.
参数
String- The transaction hash.Function- (optional) Optional callback, returns an error object as first parameter and the result as second.
.. _eth-gettransactionreceipt-return:
返回值
Promise returns Object - A transaction receipt object, or null if no receipt was found:
status-Boolean:TRUEif the transaction was successful,FALSEif the EVM reverted the transaction.blockHash32 Bytes -String: Hash of the block where this transaction was in.blockNumber-Number: Block number where this transaction was in.transactionHash32 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.nullwhen it’s a contract creation transaction.contractAddress-String: The contract address created, if the transaction was a contract creation, otherwisenull.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.
例子
var receipt = web3.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.
}, ...]
}
.. _eth-gettransactioncount:
getTransactionCount
web3.eth.getTransactionCount(address [, defaultBlock] [, callback])
Get the number of transactions sent from this address.
参数
String- The address to get the numbers of transactions from.Number|String|BN|BigNumber- (optional) If you pass this parameter it will not use the default block set with :ref:web3.eth.defaultBlock <eth-defaultblock>. Pre-defined block numbers as"earliest","latest"and"pending"can also be used.Function- (optional) Optional callback, returns an error object as first parameter and the result as second.
返回值
Promise returns Number - The number of transactions sent from the given address.
例子
web3.eth.getTransactionCount("0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe")
.then(console.log);
> 1
.. _eth-sendtransaction:
sendTransaction
web3.eth.sendTransaction(transactionObject [, callback])
Sends a transaction to the network.
参数
-
Object- The transaction object to send:from-String|Number: The address for the sending account. Uses the :ref:web3.eth.defaultAccount <eth-defaultaccount>property, if not specified. Or an address or index of a local wallet in :ref:web3.eth.accounts.wallet <eth_accounts_wallet>.to-String: (optional) The destination address of the message, left undefined for a contract-creation transaction.value-Number|String|BN|BigNumber: (optional) The value transferred for the transaction in :ref:wei <what-is-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|BigNumber: (optional) The price of gas for this transaction in :ref:wei <what-is-wei>, defaults to :ref:web3.eth.gasPrice <eth-gasprice>.data-String: (optional) Either aABI 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 initialisation code.nonce-Number: (optional) Integer of the nonce. This allows to overwrite your own pending transactions that use the same nonce.chain-String: (optional) Defaults tomainnet.hardfork-String: (optional) Defaults topetersburg.common-Object: (optional) The common objectcustomChain-Object: The custom chain propertiesname-string: (optional) The name of the chainnetworkId-number: Network ID of the custom chainchainId-number: Chain ID of the custom chain
baseChain-string: (optional)mainnet,goerli,kovan,rinkeby, orropstenhardfork-string: (optional)chainstart,homestead,dao,tangerineWhistle,spuriousDragon,byzantium,constantinople,petersburg, oristanbul
-
callback-Function: (optional) Optional callback, returns an error object as first parameter and the result as second.
.. note:: The from property can also be an address or index from the :ref:web3.eth.accounts.wallet <eth_accounts_wallet>. It will then sign locally using the private key of that account, and send the transaction via :ref:web3.eth.sendSignedTransaction() <eth-sendsignedtransaction>. If the properties chain and hardfork or common are not set, Web3 will try to set appropriate values by querying the network for its chainId and networkId.
.. _eth-sendtransaction-return:
返回值
The callback will return the 32 bytes transaction hash.
PromiEvent: A :ref:promise combined event emitter <promiEvent>. Resolves when the transaction :ref:receipt <eth-gettransactionreceipt-return> is available. The following events are also available:
sendingreturnspayload: Object: Fired immediately before transmitting the transaction request.sentreturnspayload: Object: Fired immediately after the request body has been written to the client, but before the transaction hash is received."transactionHash"returnstransactionHash: String: Fired when the transaction hash is available."receipt"returnsreceipt: Object: Fired when the transaction receipt is available."confirmation"returnsconfirmationNumber: Number,receipt: Object,latestBlockHash: String: Fired for every confirmation up to the 12th confirmation. Receives the confirmation number as the first and the :ref:receipt <eth-gettransactionreceipt-return>as the second argument. Fired from confirmation 0 on, which is the block where it’s mined."error"returnserror: Error: Fired if an error occurs during sending. If the transaction was rejected by the network with a receipt, the receipt will be available as a property on the error object.
例子
// compiled solidity source code using https://remix.ethereum.org
var code = "603d80600c6000396000f3007c01000000000000000000000000000000000000000000000000000000006000350463c6888fa18114602d57005b6007600435028060005260206000f3";
// using the callback
web3.eth.sendTransaction({
from: '0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe',
data: code // deploying a contracrt
}, function(error, hash){
...
});
// using the promise
web3.eth.sendTransaction({
from: '0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe',
to: '0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe',
value: '1000000000000000'
})
.then(function(receipt){
...
});
// using the event emitter
web3.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.
.. _eth-sendsignedtransaction:
sendSignedTransaction
web3.eth.sendSignedTransaction(signedTransactionData [, callback])
Sends an already signed transaction, generated for example using :ref:web3.eth.accounts.signTransaction <eth-accounts-signtransaction>.
参数
String- Signed transaction data in HEX formatFunction- (optional) Optional callback, returns an error object as first parameter and the result as second.
返回值
PromiEvent: A :ref:promise combined event emitter <promiEvent>. Resolves when the transaction :ref:receipt <eth-gettransactionreceipt-return> is available.
Please see the return values for :ref:web3.eth.sendTransaction <eth-sendtransaction-return> for details.
例子
var Tx = require('ethereumjs-tx').Transaction;
var privateKey = Buffer.from('e331b6d69882b4cb4ea581d88e0b604039a3de5967688d3dcffdd2270c0fd109', 'hex');
var rawTx = {
nonce: '0x00',
gasPrice: '0x09184e72a000',
gasLimit: '0x2710',
to: '0x0000000000000000000000000000000000000000',
value: '0x00',
data: '0x7f7465737432000000000000000000000000000000000000000000000000000000600057'
}
var tx = new Tx(rawTx, {'chain':'ropsten'});
tx.sign(privateKey);
var serializedTx = tx.serialize();
// console.log(serializedTx.toString('hex'));
// 0xf889808609184e72a00082271094000000000000000000000000000000000000000080a47f74657374320000000000000000000000000000000000000000000000000000006000571ca08a8bbf888cfa37bbf0bb965423625641fc956967b81d12e23709cead01446075a01ce999b56a8a88504be365442ea61239198e23d1fce7d00fcfc5cd3b44b7215f
web3.eth.sendSignedTransaction('0x' + serializedTx.toString('hex'))
.on('receipt', console.log);
> // see eth.getTransactionReceipt() for details
.. note:: When using ethereumjs-tx@2.0.0 if you don’t specify the parameter chain it will use mainnet by default.
sign
web3.eth.sign(dataToSign, address [, callback])
Signs data using a specific account. This account needs to be unlocked.
参数
String- Data to sign. If it is a string it will be converted using :ref:web3.utils.utf8ToHex <utils-utf8tohex>.String|Number- Address to sign data with. Can be an address or the index of a local wallet in :ref:web3.eth.accounts.wallet <eth-accounts-wallet>.Function- (optional) Optional callback, returns an error object as first parameter and the result as second.
返回值
Promise returns String - The signature.
例子
web3.eth.sign("Hello world", "0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe")
.then(console.log);
> "0x30755ed65396facf86c53e6217c52b4daebe72aa4941d89635409de4c9c7f9466d4e9aaec7977f05e923889b33c0d0dd27d7226b6e6f56ce737465c5cfd04be400"
// the below is the same
web3.eth.sign(web3.utils.utf8ToHex("Hello world"), "0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe")
.then(console.log);
> "0x30755ed65396facf86c53e6217c52b4daebe72aa4941d89635409de4c9c7f9466d4e9aaec7977f05e923889b33c0d0dd27d7226b6e6f56ce737465c5cfd04be400"
signTransaction
web3.eth.signTransaction(transactionObject, address [, callback])
Signs a transaction. This account needs to be unlocked.
参数
Object- The transaction data to sign. See :ref:web3.eth.sendTransaction() <eth-sendtransaction>for more.String- Address to sign transaction with.Function- (optional) Optional callback, returns an error object as first parameter and the result as second.
返回值
Promise returns Object - The RLP encoded transaction. The raw property can be used to send the transaction using :ref:web3.eth.sendSignedTransaction <eth-sendsignedtransaction>.
例子
web3.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
web3.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.
参数
Object- A transaction object, see :ref:web3.eth.sendTransaction <eth-sendtransaction-return>. For calls thefromproperty is optional however it is highly recommended to explicitly set it or it may default toaddress(0)depending on your node or provider.Number|String|BN|BigNumber- (optional) If you pass this parameter it will not use the default block set with :ref:web3.eth.defaultBlock <eth-defaultblock>. Pre-defined block numbers as"earliest","latest"and"pending"can also be used.Function- (optional) Optional callback, returns an error object as first parameter and the result as second.
返回值
Promise returns String: The returned data of the call, e.g. a smart contract functions return value.
例子
web3.eth.call({
to: "0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe", // contract address
data: "0xc6888fa10000000000000000000000000000000000000000000000000000000000000003"
})
.then(console.log);
> "0x000000000000000000000000000000000000000000000000000000000000000a"
estimateGas
web3.eth.estimateGas(callObject [, callback])
Executes a message call or transaction and returns the amount of the gas used.
Note: You must specify a from address otherwise you may experience odd behavior.
参数
Object- A transaction object, see :ref:web3.eth.sendTransaction <eth-sendtransaction-return>with the difference that for calls thefromproperty is optional as well.Function- (optional) Optional callback, returns an error object as first parameter and the result as second.
返回值
Promise returns Number - the used gas for the simulated call/transaction.
例子
web3.eth.estimateGas({
to: "0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe",
data: "0xc6888fa10000000000000000000000000000000000000000000000000000000000000003"
})
.then(console.log);
> "0x0000000000000000000000000000000000000000000000000000000000000015"
getPastLogs
web3.eth.getPastLogs(options [, callback])
Gets past logs, matching the given options.
参数
Object- The filter options as follows:
fromBlock-Number|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|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|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 usenull, e.g.[null, '0x12...']. You can also pass an array for each topic with options for that topic e.g.[null, ['option1', 'option2']]
.. _eth-getpastlogs-return:
返回值
Promise returns Array - Array of log objects.
The structure of the returned event Object in the Array looks as follows:
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.transactionHash32 Bytes -String: Hash of the transaction this event was created in.blockHash32 Bytes -String: Hash of the block where this event was created in.nullif still pending.blockNumber-Number: The block number where this log was created in.nullif still pending.
例子
web3.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
web3.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”).
参数
Function- (optional) Optional callback, returns an error object as first parameter and the result as second.
返回值
Promise returns Array - the mining work with the following structure:
- `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.
例子
web3.eth.getWork()
.then(console.log);
> [
"0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
"0x5EED00000000000000000000000000005EED0000000000000000000000000000",
"0xd1ff1c01710000000000000000000000d1ff1c01710000000000000000000000"
]
submitWork
web3.eth.submitWork(nonce, powHash, digest, [callback])
Used for submitting a proof-of-work solution.
参数
String8 Bytes: The nonce found (64 bits)String32 Bytes: The header’s pow-hash (256 bits)String32 Bytes: The mix digest (256 bits)Function- (optional) Optional callback, returns an error object as first parameter and the result as second.
返回值
Promise returns Boolean - Returns TRUE if the provided solution is valid, otherwise FALSE.
例子
web3.eth.submitWork([
"0x0000000000000001",
"0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
"0xD1FE5700000000000000000000000000D1FE5700000000000000000000000000"
])
.then(console.log);
> true
.. _eth-requestaccounts:
requestAccounts
web3.eth.requestAccounts([callback])
This method will request/enable the accounts from the current environment. This method will only work if you’re using the injected provider from a application like Metamask, Status or TrustWallet. It doesn’t work if you’re connected to a node with a default Web3.js provider (WebsocketProvider, HttpProvidder and IpcProvider).
For more information about the behavior of this method please read EIP-1102: Opt-in account exposure <https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1102.md>_.
参数
Function- (optional) Optional callback, returns an error object as first parameter and the result as second.
返回值
Promise<Array> - Returns an array of enabled accounts.
例子
web3.eth.requestAccounts().then(console.log);
> ['0aae0B295369a9FD31d5F28D9Ec85E40f4cb692BAf', '0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe']
.. _eth-chainId:
getChainId
web3.eth.getChainId([callback])
Returns the chain ID of the current connected node as described in the EIP-695 <https://github.com/ethereum/EIPs/blob/master/EIPS/eip-695.md>_.
返回值
Promise<Number> - Returns chain ID.
例子
web3.eth.getChainId().then(console.log);
> 61
.. _eth-getNodeInfo:
getNodeInfo
web3.eth.getNodeInfo([callback])
返回值
Promise<String> - The current client version.
例子
web3.eth.getNodeInfo().then(console.log);
> "Mist/v0.9.3/darwin/go1.4.1"
.. _eth-getProof:
getProof
web3.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 <https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1186.md>_.
参数
String20 Bytes: The Address of the account or contract.Number[] | BigNumber[] | BN[] | String[]32 Bytes: Array of storage-keys which should be proofed and included. See :ref:web3.eth.getStorageAt <eth-getStorageAt>.Number | String | BN | BigNumber: Integer block number. Pre-defined block numbers as"earliest","latest"and"pending"can also be used.Function- (optional) Optional callback, returns an error object as first parameter and the result as second.
返回值
Promise<Object> - A account object.
- `address` - `String`: The address of the account.
- `balance` - `String`: The balance of the account. See :ref:`web3.eth.getBalance <eth-getBalance>`.
- `codeHash` - `String`: hash of the code of the account. For a simple account without code it will return `"0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470"`.
- `nonce` - `String`: Nonce of the account.
- `storageHash` - `String`: SHA3 of the StorageRoot. All storage will deliver a MerkleProof starting with this rootHash.
- `accountProof` - `String[]`:Array of rlp-serialized MerkleTree-Nodes, starting with the stateRoot-Node, following the path of the SHA3 (address) as key.
- `storageProof` - `Object[]` Array of storage-entries as requested.
- `key` - `String` The requested storage key.
- `value` - `String` The storage value.
例子
web3.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"
],
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}
