#
Provider

Explain what a provider is...

##
Accounts Methods

provider . getBalance ( address [ , blockTag = "latest" ] ) ⇒ Promise<BigNumber>

Returns the balance of address as of the blockTag block height.

provider . getCode ( address [ , blockTag = "latest" ] ) ⇒ Promise<Hexstring>

Returns the contract code of address as of the blockTag block height. If there is no contract currently deployed, the result is `0x`.

provider . getStorageAt ( address , position [ , blockTag = "latest" ] ) ⇒ Promise<Hexstring>

Returns the `Bytes32` value of the position at address, as of the blockTag.

provider . getTransactionCount ( address [ , blockTag = "latest" ] ) ⇒ Promise< number >

Returns the number of transactions address has ever sent, as of blockTag. This value is required to be the nonce for the next transaction from address sent to the network.

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Examples

Skipping JavaScript Evaluation.

##
Blocks Methods

provider . getBlock ( block ) ⇒ Promise<Block>

Get the block from the network, where the `result.transactions` is a list of transaction hashes.

provider . getBlockWithTransactions ( block ) ⇒ Promise<BlockWithTransactions>

Get the block from the network, where the `result.transactions` is an Array of TransactionResponse objects.

##
Ethereum Naming Service (ENS) Methods

TODO: Explain ENS here...

provider . lookupAddress ( address ) ⇒ Promise< string >

Performs a reverse lookup of the address in ENS using the Reverse Registrar. If the name does not exist, or the forward lookup does not match, `null` is returned.

provider . resovleName ( name ) ⇒ Promise< string >

Looks up the address of name. If the name is not owned, or does not have a Resolver configured, or the Resolver does not have an address configured, `null` is returned.

###
Examples

Skipping JavaScript Evaluation.

##
Logs Methods

provider . getLogs ( filter ) ⇒ Promise< Array<Log> >

Returns the Array of Log matching the filter.

Keep in mind that many backends will discard old events, and that requests which are too broad may get dropped as they require too many resources to execute the query.

##
Network Status Methods

provider . getNetwork ( ) ⇒ Promise<Network>

Returns the Network this Provider is connected to.

provider . getBlockNumber ( ) ⇒ Promise< number >

Returns the block number (or height) of the most recently mined block.

provider . getGasPrice ( ) ⇒ Promise<BigNumber>

Returns a best guess of the Gas Price to use in a transaction.

##
Transactions Methods

provider . call ( transaction [ , blockTag = "latest" ] ) ⇒ Promise<Hexstring>

Returns the result of executing the transaction, using call. A call does not require any ether, but cannot change any state. This is useful for calling gettings on Contracts.

provider . estimateGas ( transaction ) ⇒ Promise<BigNumber>

Returns an estimate of the amount of gas that would be required to submit transaction to the network.

An estimate may not be accurate since there could be another transaction on the network that was not accounted for, but after being mined affected relevant state.

provider . sendTransaction ( transaction ) ⇒ Promise<TransactionResponse>

Submits transaction to the network to be mined. The transaction must be signed, and be valid (i.e. the nonce is correct and the account has sufficient balance to pay for the transaction).

provider . waitForTransaction ( transactionHash ) ⇒ Promise<TransactionReceipt>

Returns a Promise which will not resolve until transactionHash is mined.

##
Event Emitter Methods

Explain events here...

provider . on ( eventName , listener ) ⇒ this

Add a listener to be triggered for each eventName.

provider . once ( eventName , listener ) ⇒ this

Add a listener to be triggered for only the next eventName, at which time it be removed.

provider . emit ( eventName , ...args ) ⇒ boolean

Notify all listeners of eventName, passing args to each listener. This is generally only used internally.

provider . off ( eventName [ , listener ] ) ⇒ this

Remove a listener for eventName. If no listener is provided, all listeners for eventName are removed.

provider . removeAllListeners ( [ eventName ] ) ⇒ this

Remove all the listeners for eventName. If no eventName is provided, all events are removed.

provider . listenerCount ( [ eventName ] ) ⇒ number

Returns the number of listeners for eventName. If no eventName is provided, the total number of listeners is returned.

provider . listeners ( eventName ) ⇒ Array< Listener >

Returns the list of Listeners for eventName.

##
Inspection Methods

Provider . isProvider ( object ) ⇒ boolean

Returns true if and only if object is a Provider.

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