An Interface abstracts many of the low-level details for encoding and decoding the data on the blockchain. An ABI provides information on how to encode data to send to a Contract, how to decode the results and events and how to interpret revert errors. The ABI can be specified by any supported format.

​
Constructors

​
new Interface()

new Interface(fragments): Interface
Create a new Interface for the fragments.

​
Parameters

ParameterTypeDescription
fragmentsInterfaceAbiThe ABI fragments.

​
Returns

Interface

​
Source

abi/interface.ts:342

​
Properties

PropertyModifierTypeDescription
deployreadonlyConstructorFragmentThe Contract constructor.
fallbackreadonlynull | FallbackFragmentThe Fallback method, if any.
fragmentsreadonlyreadonly Fragment[]All the Contract ABI members (i.e. methods, events, errors, etc).
receivereadonlybooleanIf receiving ether is supported.

​
Methods

​
decodeErrorResult()

decodeErrorResult(fragment, data): Result
Decodes the result data (e.g. from an quai_call) for the specified error (see getError for valid values for key). Most developers should prefer the parseCallResult | parseCallResult method instead, which will automatically detect a CALL_EXCEPTION and throw the corresponding error.

​
Parameters

ParameterType
fragmentstring | ErrorFragment
dataBytesLike

​
Returns

Result

​
Source

abi/interface.ts:826

​
decodeFunctionData()

decodeFunctionData(fragment, data): Result
Decodes the data from a transaction tx.data for the function specified (see getFunction for valid values for fragment). Most developers should prefer the parseTransaction method instead, which will automatically detect the fragment.

​
Parameters

ParameterType
fragmentstring | FunctionFragment
dataBytesLike

​
Returns

Result

​
Source

abi/interface.ts:866

​
decodeFunctionResult()

decodeFunctionResult(fragment, data): Result
Decodes the result data (e.g. from an quai_call) for the specified function (see getFunction for valid values for key). Most developers should prefer the parseCallResult | parseCallResult method instead, which will automatically detect a CALL_EXCEPTION and throw the corresponding error.

​
Parameters

ParameterType
fragmentstring | FunctionFragment
dataBytesLike

​
Returns

Result

​
Source

abi/interface.ts:904

​
encodeDeploy()

encodeDeploy(values?): string
Encodes a tx.data object for deploying the Contract with the values as the constructor arguments.

​
Parameters

ParameterType
values?readonly any[]

​
Returns

string

​
Source

abi/interface.ts:815

​
encodeErrorResult()

encodeErrorResult(fragment, values?): string
Encodes the transaction revert data for a call result that reverted from the the Contract with the sepcified error (see getError for valid values for fragment) with the values. This is generally not used by most developers, unless trying to mock a result from a Contract.

​
Parameters

ParameterType
fragmentstring | ErrorFragment
values?readonly any[]

​
Returns

string

​
Source

abi/interface.ts:849

​
encodeFunctionData()

encodeFunctionData(fragment, values?): string
Encodes the tx.data for a transaction that calls the function specified (see getFunction for valid values for fragment) with the values.

​
Parameters

ParameterType
fragmentstring | FunctionFragment
values?readonly any[]

​
Returns

string

​
Source

abi/interface.ts:887

​
encodeFunctionResult()

encodeFunctionResult(fragment, values?): string
Encodes the result data (e.g. from an quai_call) for the specified function (see getFunction for valid values for fragment) with values. This is generally not used by most developers, unless trying to mock a result from a Contract.

​
Parameters

ParameterType
fragmentstring | FunctionFragment
values?readonly any[]

​
Returns

string

​
Source

abi/interface.ts:975

​
forEachError()

forEachError(callback): void
Iterate over all errors, calling callback, sorted by their name.

​
Parameters

ParameterType
callback(func, index) => void

​
Returns

void

​
Source

abi/interface.ts:789

​
forEachEvent()

forEachEvent(callback): void
Iterate over all events, calling callback, sorted by their name.

​
Parameters

ParameterType
callback(func, index) => void

​
Returns

void

​
Source

abi/interface.ts:708

​
forEachFunction()

forEachFunction(callback): void
Iterate over all functions, calling callback, sorted by their name.

​
Parameters

ParameterType
callback(func, index) => void

​
Returns

void

​
Source

abi/interface.ts:595

​
format()

format(minimal?): string[]
Returns the entire Human-Readable ABI, as an array of signatures, optionally as minimal strings, which removes parameter names and unneceesary spaces.

​
Parameters

ParameterType
minimal?boolean

​
Returns

string[]

​
Source

abi/interface.ts:438

​
formatJson()

formatJson(): string
Return the JSON-encoded ABI. This is the format Solidiy returns.

​
Returns

string

​
Source

abi/interface.ts:447

​
getAbiCoder()

getAbiCoder(): AbiCoder
The ABI coder that will be used to encode and decode binary data.

​
Returns

AbiCoder

​
Source

abi/interface.ts:457

​
getError()

getError(key, values?): null | ErrorFragment
Get the ErroFragment for key, which may be an error selector, error name or error signature that belongs to the ABI. If values is provided, it will use the Typed API to handle ambiguous cases where multiple errors match by name. If the key and values do not refine to a single error in the ABI, this will throw.

​
Parameters

ParameterType
keystring
values?any[]

​
Returns

null | ErrorFragment

​
Source

abi/interface.ts:727

​
getEvent()

getEvent(key, values?): null | EventFragment
Get the EventFragment for key, which may be a topic hash, event name or event signature that belongs to the ABI. If values is provided, it will use the Typed API to handle ambiguous cases where multiple events match by name. If the key and values do not refine to a single event in the ABI, this will throw.

​
Parameters

ParameterType
keystring
values?any[]

​
Returns

null | EventFragment

​
Source

abi/interface.ts:701

​
getEventName()

getEventName(key): string
Get the event name for key, which may be a topic hash, event name or event signature that belongs to the ABI.

​
Parameters

ParameterType
keystring

​
Returns

string

​
Source

abi/interface.ts:676

​
getFunction()

getFunction(key, values?): null | FunctionFragment
Get the FunctionFragment for key, which may be a function selector, function name or function signature that belongs to the ABI. If values is provided, it will use the Typed API to handle ambiguous cases where multiple functions match by name. If the key and values do not refine to a single function in the ABI, this will throw.

​
Parameters

ParameterType
keystring
values?any[]

​
Returns

null | FunctionFragment

​
Source

abi/interface.ts:588

​
getFunctionName()

getFunctionName(key): string
Get the function name for key, which may be a function selector, function name or function signature that belongs to the ABI.

​
Parameters

ParameterType
keystring

​
Returns

string

​
Source

abi/interface.ts:563

​
hasEvent()

hasEvent(key): boolean
Returns true if key (an event topic hash, event name or event signature) is present in the ABI. In the case of an event name, the name may be ambiguous, so accessing the EventFragment may require refinement.

​
Parameters

ParameterType
keystring

​
Returns

boolean

​
Source

abi/interface.ts:689

​
hasFunction()

hasFunction(key): boolean
Returns true if key (a function selector, function name or function signature) is present in the ABI. In the case of a function name, the name may be ambiguous, so accessing the FunctionFragment may require refinement.

​
Parameters

ParameterType
keystring

​
Returns

boolean

​
Source

abi/interface.ts:575

​
parseError()

parseError(data): null | ErrorDescription
Parses a revert data, finding the matching error and extracts the parameter values along with other useful error details. If the matching error cannot be found, returns null.

​
Parameters

ParameterType
dataBytesLike

​
Returns

null | ErrorDescription

​
Source

abi/interface.ts:1241

​
parseLog()

parseLog(log): null | LogDescription
Parses a receipt log, finding the matching event and extracts the parameter values along with other useful event details. If the matching event cannot be found, returns null.

​
Parameters

ParameterType
logobject
log.datastring
log.topicsstring[]

​
Returns

null | LogDescription

​
Source

abi/interface.ts:1221

​
parseTransaction()

parseTransaction(tx): null | TransactionDescription
Parses a transaction, finding the matching function and extracts the parameter values along with other useful function details. If the matching function cannot be found, return null.

​
Parameters

ParameterType
txobject
tx.datastring
tx.value?BigNumberish

​
Returns

null | TransactionDescription

​
Source

abi/interface.ts:1195

​
from()

static from(value): Interface
Creates a new Interface from the ABI value. The value may be provided as an existing Interface object, a JSON-encoded ABI or any Human-Readable ABI format.

​
Parameters

ParameterType
valueInterface | InterfaceAbi

​
Returns

Interface

​
Source

abi/interface.ts:1260