Class EvmWeb3Public

Class containing methods for calling contracts in order to obtain information from the blockchain. To send transaction or execute contract method use Web3Private.

Hierarchy

Web3Public
- EvmWeb3Public

Constructors

constructor

new EvmWeb3Public(web3: default, blockchainName: EvmBlockchainName, httpClient?: HttpClient): EvmWeb3Public
Parameters
- web3: default
- blockchainName: EvmBlockchainName
- Optional httpClient: HttpClient
Returns EvmWeb3Public
Overrides Web3Public.constructor
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:54

Accessors

web3Provider

get web3Provider(): default
Returns default
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:50

Methods

batchEstimatedGas

batchEstimatedGas(fromAddress: string, callsData: BatchCall[]): Promise<(null | BigNumber)[]>
Get estimated gas of several contract method executions via rpc batch request.

Returns
List of contract execution estimated gases. If the execution of the method in the real blockchain would not be reverted, then the list item would be equal to the predicted gas limit. Else (if you have not enough balance, allowance ...) then the list item would be equal to null.
Parameters
- fromAddress: string
  
  Sender address.
- callsData: BatchCall[]
  
  Transactions parameters.
Returns Promise<(null | BigNumber)[]>
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:344

callContractMethod

callContractMethod<T>(contractAddress: string, contractAbi: AbiItem[], methodName: string, methodArguments?: unknown[], options?: {
    from?: string;
    gas?: string;
    gasPrice?: string;
    value?: string;
}): Promise<T>
Calls pure method of smart-contract and returns its output value.
Type Parameters
- T extends Web3PrimitiveType = string
Parameters
- contractAddress: string
  
  Address of smart-contract which method is to be executed.
- contractAbi: AbiItem[]
  
  Abi of smart-contract which method is to be executed.
- methodName: string
  
  Called method name.
- methodArguments: unknown[] = []
  
  Method arguments.
- options: {
      from?: string;
      gas?: string;
      gasPrice?: string;
      value?: string;
  } = {}
  
  Transaction options.
  - Optional from?: string
  - Optional gas?: string
  - Optional gasPrice?: string
  - Optional value?: string
Returns Promise<T>
Overrides Web3Public.callContractMethod
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:255

callForTokenInfo

callForTokenInfo(tokenAddress: string, tokenFields?: SupportedTokenField[]): Promise<Partial<Record<SupportedTokenField, string>>>
Gets token info by address.
Parameters
- tokenAddress: string
  
  Address of token.
- tokenFields: SupportedTokenField[] = ...
  
  Token's fields to get.
Returns Promise<Partial<Record<SupportedTokenField, string>>>
Inherited from Web3Public.callForTokenInfo
- Defined in src/core/blockchain/web3-public-service/web3-public/web3-public.ts:82

callForTokensInfo

callForTokensInfo(tokenAddresses: string[] | readonly string[], tokenFields?: SupportedTokenField[]): Promise<Partial<Record<SupportedTokenField, string>>[]>
Gets tokens info by addresses.
Parameters
- tokenAddresses: string[] | readonly string[]
  
  Addresses of tokens.
- tokenFields: SupportedTokenField[] = ...
  
  Token's fields to get.
Returns Promise<Partial<Record<SupportedTokenField, string>>[]>
Overrides Web3Public.callForTokensInfo
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:635

checkBalance

checkBalance(token: Token<BlockchainName>, requiredAmount: BigNumber, userAddress: string): Promise<void>
Checks that user has enough balance.
Parameters
- token: Token<BlockchainName>
  
  Token to check balance of.
- requiredAmount: BigNumber
  
  Required user balance in Eth units.
- userAddress: string
  
  Wallet address, which contains tokens.
Returns Promise<void>
Inherited from Web3Public.checkBalance
- Defined in src/core/blockchain/web3-public-service/web3-public/web3-public.ts:65

getAllowance

getAllowance(tokenAddress: string, ownerAddress: string, spenderAddress: string): Promise<BigNumber>
Calls allowance method in token contract.

Returns
Token's amount, allowed to be spent.
Parameters
- tokenAddress: string
  
  Address of the smart-contract corresponding to the token.
- ownerAddress: string
  
  Wallet address to spend from.
- spenderAddress: string
  
  Wallet or contract address, allowed to spend.
Returns Promise<BigNumber>
Overrides Web3Public.getAllowance
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:110

getAllowanceAndExpirationOnPermit2

getAllowanceAndExpirationOnPermit2(tokenAddress: string, walletAddress: string, spenderAddress: string, permit2Address: string): Promise<Permit2AllowanceData>
Parameters
- tokenAddress: string
- walletAddress: string
- spenderAddress: string
- permit2Address: string
Returns Promise<Permit2AllowanceData>
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:126

getBalance

getBalance(userAddress: string, tokenAddress?: string): Promise<BigNumber>
Gets account native or token balance in wei.
Parameters
- userAddress: string
  
  Wallet address, whose balance you want to find out.
- Optional tokenAddress: string
  
  Address of the smart-contract corresponding to the token,
Returns Promise<BigNumber>
Overrides Web3Public.getBalance
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:95

getBlock

getBlock(blockId??: BlockNumber): Promise<BlockTransactionString>
Gets block by block id.

Returns
Block by blockId parameter.
Parameters
- Optional blockId: BlockNumber = 'latest'
  
  Block id: hash, number ... Default is 'latest'.
Returns Promise<BlockTransactionString>
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:529

getBlockNumber

getBlockNumber(): Promise<number>
Gets last block number.

Returns
Block number.

Returns Promise<number>
Overrides Web3Public.getBlockNumber
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:533

getEstimatedGas

getEstimatedGas(contractAbi: AbiItem[], contractAddress: string, methodName: string, methodArguments: unknown[], fromAddress: string, value?: string | BigNumber): Promise<null | BigNumber>
Predicts the volume of gas required to execute the contract method.

Returns
Estimated gas limit.
Parameters
- contractAbi: AbiItem[]
  
  Abi of smart-contract.
- contractAddress: string
  
  Address of smart-contract.
- methodName: string
  
  Method which execution gas limit is to be calculated.
- methodArguments: unknown[]
  
  Arguments of the contract method.
- fromAddress: string
  
  The address for which the gas calculation will be called.
- Optional value: string | BigNumber
  
  The value transferred for the call “transaction” in wei.
Returns Promise<null | BigNumber>
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:287

getEstimatedGasByData

getEstimatedGasByData(fromAddress: string, toAddress: string, options: {
    data: string;
    from?: string;
    gas?: string;
    gasPrice?: string;
    value?: string;
}): Promise<null | BigNumber>
Parameters
- fromAddress: string
- toAddress: string
- options: {
      data: string;
      from?: string;
      gas?: string;
      gasPrice?: string;
      value?: string;
  }
  - data: string
  - Optional from?: string
  - Optional gas?: string
  - Optional gasPrice?: string
  - Optional value?: string
Returns Promise<null | BigNumber>
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:309

getGasPrice

getGasPrice(): Promise<string>
Calculates the average price per unit of gas according to web3.

Returns
Average gas price in wei.

Returns Promise<string>
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:433

getMaxPriorityFeePerGas

getMaxPriorityFeePerGas(): Promise<number>
Estimates average maxPriorityFeePerGas for EIP-1559 transactions based on last 20 blocks.

See
https://docs.alchemy.com/docs/how-to-build-a-gas-fee-estimator-using-eip-1559

Returns
Average maxPriorityFeePerGas in wei

Returns Promise<number>
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:442

getPastEvents

getPastEvents(contractAddress: string, contractAbi: AbiItem[], eventName: string, options: {
blocksAmount: number;
toBlock: number | "latest";
}): Promise<EventData[]>
Parameters
- contractAddress: string
- contractAbi: AbiItem[]
- eventName: string
- options: {
  blocksAmount: number;
  toBlock: number | "latest";
  }
  - blocksAmount: number
  - toBlock: number | "latest"
Returns Promise<EventData[]>
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:537

getPriorityFeeGas

getPriorityFeeGas(): Promise<GasPrice>
Calculates EIP-1559 specific gas details.

See
https://github.com/ethers-io/ethers.js/blob/master/packages/abstract-provider/src.ts/index.ts#L235

Returns
block baseFee, average maxPriorityFeePerGas, and maxFeePerGas.

Returns Promise<GasPrice>
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:460

getTokenBalance

getTokenBalance(userAddress: string, tokenAddress: string): Promise<BigNumber>
Gets token's balance in wei.
Parameters
- userAddress: string
  
  Wallet address, whose balance you want to find out.
- tokenAddress: string
  
  Address of the smart-contract corresponding to the token.
Returns Promise<BigNumber>
Overrides Web3Public.getTokenBalance
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:103

getTokensBalances

getTokensBalances(userAddress: string, tokensAddresses: string[]): Promise<BigNumber[]>
Parameters
- userAddress: string
- tokensAddresses: string[]
Returns Promise<BigNumber[]>
Overrides Web3Public.getTokensBalances
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:595

getTransactionReceipt

getTransactionReceipt(hash: string): Promise<TransactionReceipt>
Gets mined transaction receipt.
Parameters
- hash: string
  
  Transaction hash
Returns Promise<TransactionReceipt>
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:413

getTransactionStatus

getTransactionStatus(hash: string): Promise<TxStatus>
Returns transaction status, based on transaction receipt.
Parameters
- hash: string
Returns Promise<TxStatus>
Overrides Web3Public.getTransactionStatus
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:417

healthCheck

healthCheck(timeoutMs?: number): Promise<boolean>
Health-check current rpc node.

Returns
Null if healthcheck is not defined for current blockchain, else node health status.
Parameters
- timeoutMs: number = 4000
  
  Acceptable node response timeout.
Returns Promise<boolean>
Overrides Web3Public.healthCheck
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:66

multicallContractMethod

multicallContractMethod<Output>(contractAddress: string, contractAbi: AbiItem[], methodName: string, methodCallsArguments: unknown[][]): Promise<ContractMulticallResponse<Output>[]>
Uses multicall to make several calls of one method in one contract.
Type Parameters
- Output extends Web3PrimitiveType
Parameters
- contractAddress: string
  
  Target contract address.
- contractAbi: AbiItem[]
  
  Target contract abi.
- methodName: string
  
  Method name.
- methodCallsArguments: unknown[][]
  
  Method parameters array, for each method call.
Returns Promise<ContractMulticallResponse<Output>[]>
Inherited from Web3Public.multicallContractMethod
- Defined in src/core/blockchain/web3-public-service/web3-public/web3-public.ts:120

multicallContractMethods

multicallContractMethods<Output>(contractAddress: string, contractAbi: AbiItem[], methodsData: MethodData[]): Promise<ContractMulticallResponse<Output>[]>
Uses multicall to make several methods calls in one contract.
Type Parameters
- Output extends Web3PrimitiveType
Parameters
- contractAddress: string
  
  Target contract address.
- contractAbi: AbiItem[]
  
  Target contract abi.
- methodsData: MethodData[]
  
  Methods data, containing methods' names and arguments.
Returns Promise<ContractMulticallResponse<Output>[]>
Inherited from Web3Public.multicallContractMethods
- Defined in src/core/blockchain/web3-public-service/web3-public/web3-public.ts:142

multicallContractsMethods

multicallContractsMethods<Output>(contractAbi: AbiItem[], contractsData: {
contractAddress: string;
methodsData: MethodData[];
}[]): Promise<ContractMulticallResponse<Output>[][]>
Uses multicall to make many methods calls in several contracts.
Type Parameters
- Output extends Web3PrimitiveType
Parameters
- contractAbi: AbiItem[]
  
  Target contract abi.
- contractsData: {
  contractAddress: string;
  methodsData: MethodData[];
  }[]
  
  Contract addresses and methods data, containing methods' names and arguments.
Returns Promise<ContractMulticallResponse<Output>[][]>
Overrides Web3Public.multicallContractsMethods
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:147

setProvider

setProvider(provider: provider): void
Sets new provider to web3 instance.
Parameters
- provider: provider
  
  New web3 provider, e.g. rpc link.
Returns void
Overrides Web3Public.setProvider
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:62

staticCallContractMethod

staticCallContractMethod(contractAddress: string, contractAbi: AbiItem[], methodName: string, methodArguments: unknown[], options: {
from: string;
value: string;
}): Promise<TransactionReceipt>
Will call smart contract method in the EVM without sending any transaction.

Returns
Transaction receipt.
Parameters
- contractAddress: string
  
  Contract address.
- contractAbi: AbiItem[]
  
  Contract ABI.
- methodName: string
  
  Method name.
- methodArguments: unknown[]
  
  Method arguments.
- options: {
  from: string;
  value: string;
  }
  
  Sender address and value.
  - from: string
  - value: string
Returns Promise<TransactionReceipt>
- Defined in src/core/blockchain/web3-public-service/web3-public/evm-web3-public/evm-web3-public.ts:564

Class EvmWeb3Public

Hierarchy

Index

Constructors

Accessors

Methods

Constructors

constructor

Parameters

web3: default

blockchainName: EvmBlockchainName

Optional httpClient: HttpClient

Returns EvmWeb3Public

Accessors

web3Provider

Returns default

Methods

batchEstimatedGas

Returns

Parameters

fromAddress: string

callsData: BatchCall[]

Returns Promise<(null | BigNumber)[]>

callContractMethod

Type Parameters

T extends Web3PrimitiveType = string

Parameters

contractAddress: string

contractAbi: AbiItem[]

methodName: string

methodArguments: unknown[] = []

options: { from?: string; gas?: string; gasPrice?: string; value?: string; } = {}

Optional from?: string

Optional gas?: string

Optional gasPrice?: string

Optional value?: string

Returns Promise<T>

callForTokenInfo

Parameters

tokenAddress: string

tokenFields: SupportedTokenField[] = ...

Returns Promise<Partial<Record<SupportedTokenField, string>>>

callForTokensInfo

Parameters

tokenAddresses: string[] | readonly string[]

tokenFields: SupportedTokenField[] = ...

Returns Promise<Partial<Record<SupportedTokenField, string>>[]>

checkBalance

Parameters

token: Token<BlockchainName>

requiredAmount: BigNumber

userAddress: string

Returns Promise<void>

getAllowance

Returns

Parameters

tokenAddress: string

ownerAddress: string

spenderAddress: string

Returns Promise<BigNumber>

getAllowanceAndExpirationOnPermit2

Parameters

tokenAddress: string

walletAddress: string

spenderAddress: string

permit2Address: string

Returns Promise<Permit2AllowanceData>

getBalance

Parameters

userAddress: string

Optional tokenAddress: string

Returns Promise<BigNumber>

getBlock

Returns

Parameters

Optional blockId: BlockNumber = 'latest'

Returns Promise<BlockTransactionString>

getBlockNumber

Returns

Returns Promise<number>

`Optional` httpClient: HttpClient

options: {
from?: string;
gas?: string;
gasPrice?: string;
value?: string;
} = {}

`Optional` from?: string

`Optional` gas?: string

`Optional` gasPrice?: string

`Optional` value?: string

`Optional` tokenAddress: string

`Optional` blockId: BlockNumber = 'latest'

`Optional` value: string | BigNumber

options: {
data: string;
from?: string;
gas?: string;
gasPrice?: string;
value?: string;
}

`Optional` from?: string

`Optional` gas?: string

`Optional` gasPrice?: string

`Optional` value?: string

options: {
blocksAmount: number;
toBlock: number | "latest";
}