casper_rust_wasm_sdk

Struct SDK

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pub struct SDK { /* private fields */ }

Implementations§

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impl SDK

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pub async fn deploy( &self, deploy_params: DeployStrParams, session_params: SessionStrParams, payment_params: PaymentStrParams, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_PutDeployResult>, Box<SdkError>>

Perform a deploy operation.

§Arguments
  • deploy_params - Deploy parameters.
  • session_params - Session parameters.
  • payment_params - Payment parameters.
  • verbosity - An optional verbosity level.
  • node_address - An optional node address.
§Returns

A result containing a SuccessResponse or an SdkError.

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impl SDK

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pub async fn speculative_deploy( &self, deploy_params: DeployStrParams, session_params: SessionStrParams, payment_params: PaymentStrParams, maybe_block_identifier: Option<BlockIdentifierInput>, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_SpeculativeExecResult>, Box<SdkError>>

This function allows executing a deploy speculatively.

§Arguments
  • deploy_params - Deployment parameters for the deploy.
  • session_params - Session parameters for the deploy.
  • payment_params - Payment parameters for the deploy.
  • maybe_block_identifier - Optional block identifier.
  • verbosity - Optional verbosity level.
  • node_address - Optional node address.
§Returns

A Result containing either a SuccessResponse<SpeculativeExecResult> or a SdkError in case of an error.

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impl SDK

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pub async fn speculative_transfer( &self, amount: &str, target_account: &str, transfer_id: Option<String>, deploy_params: DeployStrParams, payment_params: PaymentStrParams, maybe_block_identifier: Option<BlockIdentifierInput>, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_SpeculativeExecResult>, Box<SdkError>>

Perform a speculative transfer.

§Arguments
  • amount - The amount to transfer.
  • target_account - The target account.
  • transfer_id - An optional transfer ID (defaults to a random number).
  • deploy_params - The deployment parameters.
  • payment_params - The payment parameters.
  • maybe_block_identifier - An optional block identifier.
  • verbosity - The verbosity level for logging (optional).
  • node_address - The address of the node to connect to (optional).
§Returns

A Result containing the result of the speculative transfer or a SdkError in case of an error.

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impl SDK

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pub async fn transfer( &self, amount: &str, target_account: &str, transfer_id: Option<String>, deploy_params: DeployStrParams, payment_params: PaymentStrParams, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_PutDeployResult>, Box<SdkError>>

Perform a transfer of funds.

§Arguments
  • amount - The amount to transfer.
  • target_account - The target account.
  • transfer_id - An optional transfer ID (defaults to a random number).
  • deploy_params - The deployment parameters.
  • payment_params - The payment parameters.
  • verbosity - The verbosity level for logging (optional).
  • node_address - The address of the node to connect to (optional).
§Returns

A Result containing the result of the transfer or a SdkError in case of an error.

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impl SDK

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pub async fn get_account( &self, account_identifier: Option<AccountIdentifier>, account_identifier_as_string: Option<String>, maybe_block_identifier: Option<BlockIdentifierInput>, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_GetAccountResult>, Box<SdkError>>

Retrieves account information based on the provided options.

§Arguments
  • account_identifier - An optional AccountIdentifier for specifying the account identifier.
  • account_identifier_as_string - An optional string representing the account identifier.
  • maybe_block_identifier - An optional BlockIdentifierInput for specifying a block identifier.
  • verbosity - An optional Verbosity level for controlling the output verbosity.
  • node_address - An optional string specifying the node address to use for the request.
§Returns

A Result containing either a SuccessResponse<_GetAccountResult> or a SdkError in case of an error.

§Errors

Returns a SdkError if there is an error during the retrieval process.

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impl SDK

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pub async fn get_auction_info( &self, maybe_block_identifier: Option<BlockIdentifierInput>, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_GetAuctionInfoResult>, Box<SdkError>>

Retrieves auction information based on the provided options.

§Arguments
  • maybe_block_identifier - An optional BlockIdentifierInput for specifying a block identifier.
  • verbosity - An optional Verbosity level for controlling the output verbosity.
  • node_address - An optional string specifying the node address to use for the request.
§Returns

A Result containing either a GetAuctionInfoResult or a SdkError in case of an error.

§Errors

Returns a SdkError if there is an error during the retrieval process.

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impl SDK

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pub async fn get_balance( &self, purse_uref: GetBalanceInput, state_root_hash: Option<impl ToDigest>, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_GetBalanceResult>, Box<SdkError>>

Retrieves balance information based on the provided options.

§Arguments
  • state_root_hash - The state root hash to query for balance information.
  • purse_uref - The purse uref specifying the purse for which to retrieve the balance.
  • verbosity - An optional Verbosity level for controlling the output verbosity.
  • node_address - An optional string specifying the node address to use for the request.
§Returns

A Result containing either a GetBalanceResult or a SdkError in case of an error.

§Errors

Returns a SdkError if there is an error during the retrieval process.

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impl SDK

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pub async fn get_block( &self, maybe_block_identifier: Option<BlockIdentifierInput>, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_GetBlockResult>, Box<SdkError>>

Retrieves block information using the provided options.

§Arguments
  • maybe_block_identifier - An optional BlockIdentifierInput specifying the block identifier.
  • verbosity - An optional Verbosity level for the retrieval.
  • node_address - An optional node address to target for retrieval.
§Returns

A Result containing either a GetBlockResult or a SdkError in case of an error.

§Errors

Returns a SdkError if there is an error during the retrieval process.

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impl SDK

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pub async fn get_block_transfers( &self, maybe_block_identifier: Option<BlockIdentifierInput>, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_GetBlockTransfersResult>, Box<SdkError>>

Retrieves block transfers information based on the provided options.

§Arguments
  • maybe_block_identifier - An optional BlockIdentifierInput specifying the block identifier.
  • verbosity - An optional Verbosity level for controlling the output verbosity.
  • node_address - An optional string specifying the node address to use for the request.
§Returns

A Result containing either a GetBlockTransfersResult or a SdkError in case of an error.

§Errors

Returns a SdkError if there is an error during the retrieval process.

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impl SDK

Implementations for the SDK struct.

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pub async fn get_chainspec( &self, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_GetChainspecResult>, Error>

Asynchronously retrieves the chainspec.

§Arguments
  • verbosity - An optional Verbosity parameter.
  • node_address - An optional node address as a string.
§Returns

A Result containing either a GetChainspecResult or a SdkError in case of an error.

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impl SDK

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pub async fn get_deploy( &self, deploy_hash: DeployHash, finalized_approvals: Option<bool>, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_GetDeployResult>, Error>

Retrieves deploy information based on the provided options.

§Arguments
  • deploy_hash - The deploy hash.
  • finalized_approvals - An optional boolean indicating finalized approvals.
  • verbosity - An optional verbosity level.
  • node_address - An optional node address.
§Returns

A Result containing either a GetDeployResult or an error.

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impl SDK

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pub async fn get_dictionary_item( &self, dictionary_item_input: DictionaryItemInput, state_root_hash: Option<impl ToDigest>, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_GetDictionaryItemResult>, Box<SdkError>>

Retrieves dictionary item information based on the provided options.

§Arguments
  • state_root_hash - A ToDigest implementation for specifying the state root hash.
  • dictionary_item - A DictionaryItemInput enum specifying the dictionary item to retrieve.
  • verbosity - An optional Verbosity level for controlling the output verbosity.
  • node_address - An optional string specifying the node address to use for the request.
§Returns

A Result containing either a GetDictionaryItemResult or a SdkError in case of an error.

§Errors

Returns a SdkError if there is an error during the retrieval process.

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impl SDK

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pub async fn get_era_info( &self, maybe_block_identifier: Option<BlockIdentifierInput>, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_GetEraInfoResult>, Box<SdkError>>

👎Deprecated: prefer ‘get_era_summary’ as it doesn’t require a switch block
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impl SDK

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pub async fn get_era_summary( &self, maybe_block_identifier: Option<BlockIdentifierInput>, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_GetEraSummaryResult>, Box<SdkError>>

Retrieves era summary information based on the provided options.

§Arguments
  • maybe_block_identifier - An optional BlockIdentifierInput for specifying a block identifier.
  • verbosity - An optional Verbosity level for controlling the output verbosity.
  • node_address - An optional string specifying the node address to use for the request.
§Returns

A Result containing either a GetEraSummaryResult or a SdkError in case of an error.

§Errors

Returns a SdkError if there is an error during the retrieval process.

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impl SDK

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pub async fn get_node_status( &self, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_GetNodeStatusResult>, Error>

Retrieves node status information based on the provided options.

§Arguments
  • verbosity - An optional Verbosity level for controlling the output verbosity.
  • node_address - An optional string specifying the node address to use for the request.
§Returns

A Result containing either a GetNodeStatusResult or an Error in case of an error.

§Errors

Returns an Error if there is an error during the retrieval process.

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impl SDK

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pub async fn get_peers( &self, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_GetPeersResult>, Error>

Retrieves peers.

§Arguments
  • verbosity - Optional verbosity level.
  • node_address - Optional node address.
§Returns

A Result containing SuccessResponse with _GetPeersResult or an Error if an error occurs.

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impl SDK

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pub async fn get_state_root_hash( &self, maybe_block_identifier: Option<BlockIdentifierInput>, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_GetStateRootHashResult>, Box<SdkError>>

Retrieves state root hash information based on the provided options.

§Arguments
  • maybe_block_identifier - An optional BlockIdentifierInput for specifying a block identifier.
  • verbosity - An optional Verbosity level for controlling the output verbosity.
  • node_address - An optional string specifying the node address to use for the request.
§Returns

A Result containing either a GetStateRootHashResult or a SdkError in case of an error.

§Errors

Returns a SdkError if there is an error during the retrieval process.

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impl SDK

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pub async fn get_validator_changes( &self, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_GetValidatorChangesResult>, Error>

Retrieves validator changes based on the provided options.

§Arguments
  • verbosity - An optional Verbosity level for controlling the output verbosity.
  • node_address - An optional string specifying the node address to use for the request.
§Returns

A Result containing either a GetValidatorChangesResult or an Error in case of an error.

§Errors

Returns an Error if there is an error during the retrieval process.

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impl SDK

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pub async fn list_rpcs( &self, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_ListRpcsResult>, Error>

Lists available RPCs based on the provided options.

§Arguments
  • verbosity - An optional Verbosity level for controlling the output verbosity.
  • node_address - An optional string specifying the node address to use for the request.
§Returns

A Result containing either a ListRpcsResult or an Error in case of an error.

§Errors

Returns an Error if there is an error during the listing process.

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impl SDK

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pub async fn put_deploy( &self, deploy: Deploy, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_PutDeployResult>, Error>

Puts a deploy based on the provided options.

§Arguments
  • deploy - The Deploy object to be sent.
  • verbosity - An optional Verbosity level for controlling the output verbosity.
  • node_address - An optional string specifying the node address to use for the request.
§Returns

A Result containing either a PutDeployResult or an Error in case of an error.

§Errors

Returns an Error if there is an error during the deploy process.

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impl SDK

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pub async fn query_balance( &self, maybe_global_state_identifier: Option<GlobalStateIdentifier>, purse_identifier_as_string: Option<String>, purse_identifier: Option<PurseIdentifier>, state_root_hash: Option<String>, maybe_block_id: Option<String>, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_QueryBalanceResult>, Box<SdkError>>

Retrieves balance information based on the provided options.

§Arguments
  • maybe_global_state_identifier - An optional GlobalStateIdentifier for specifying global state.
  • purse_identifier_as_string - An optional string representing a purse identifier.
  • purse_identifier - An optional PurseIdentifier.
  • state_root_hash - An optional string representing a state root hash.
  • maybe_block_id - An optional string representing a block identifier.
  • verbosity - An optional Verbosity level for controlling the output verbosity.
  • node_address - An optional string specifying the node address to use for the request.
§Returns

A Result containing either a SuccessResponse<_QueryBalanceResult> or a SdkError in case of an error.

§Errors

Returns a SdkError if there is an error during the retrieval process.

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impl SDK

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pub async fn query_global_state( &self, query_params: QueryGlobalStateParams, ) -> Result<SuccessResponse<_QueryGlobalStateResult>, Box<SdkError>>

Retrieves global state information based on the provided parameters.

§Arguments
  • query_params - A QueryGlobalStateParams struct containing query parameters.
§Returns

A Result containing either a SuccessResponse<_QueryGlobalStateResult> or a SdkError in case of an error.

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impl SDK

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pub async fn speculative_exec( &self, deploy: Deploy, maybe_block_identifier: Option<BlockIdentifierInput>, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_SpeculativeExecResult>, Box<SdkError>>

Perform speculative execution.

§Arguments
  • deploy - The deploy to execute.
  • maybe_block_identifier - The block identifier.
  • verbosity - The verbosity level for logging.
  • node_address - The address of the node to connect to.
§Returns

A Result containing the result of the speculative execution or a SdkError in case of an error.

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impl SDK

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pub fn make_deploy( &self, deploy_params: DeployStrParams, session_params: SessionStrParams, payment_params: PaymentStrParams, ) -> Result<Deploy, Box<SdkError>>

Creates a deploy using the provided parameters.

§Arguments
  • deploy_params - The deploy parameters.
  • session_params - The session parameters.
  • payment_params - The payment parameters.
§Returns

A Result containing the created Deploy or a SdkError in case of an error.

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impl SDK

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pub fn make_transfer( &self, amount: &str, target_account: &str, transfer_id: Option<String>, deploy_params: DeployStrParams, payment_params: PaymentStrParams, ) -> Result<Deploy, Box<SdkError>>

Creates a transfer deploy with the provided parameters.

§Arguments
  • amount - The transfer amount.
  • target_account - The target account.
  • transfer_id - Optional transfer identifier.
  • deploy_params - The deploy parameters.
  • payment_params - The payment parameters.
§Returns

A Result containing the created Deploy or a SdkError in case of an error.

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impl SDK

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pub fn sign_deploy(&self, deploy: Deploy, secret_key: &str) -> Deploy

Signs a deploy using the provided secret key.

§Arguments
  • deploy - The deploy to sign.
  • secret_key - The secret key for signing.
§Returns

The signed Deploy.

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impl SDK

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pub fn watch_deploy( &self, events_url: &str, timeout_duration: Option<u64>, ) -> DeployWatcher

Creates a new DeployWatcher instance to watch deploys.

§Arguments
  • events_url - The URL to monitor for deploy events.
  • timeout_duration - An optional timeout duration in seconds.
§Returns

A DeployWatcher instance.

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pub async fn wait_deploy( &self, events_url: &str, deploy_hash: &str, timeout_duration: Option<u64>, ) -> Result<EventParseResult, String>

Waits for a deploy event to be processed asynchronously.

§Arguments
  • events_url - The URL to monitor for deploy events.
  • deploy_hash - The deploy hash to wait for.
  • timeout_duration - An optional timeout duration in milliseconds.
§Returns

A Result containing either the processed EventParseResult or an error message.

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impl SDK

A set of functions for working with smart contract entry points. Alias of sdk.deploy

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pub async fn call_entrypoint( &self, deploy_params: DeployStrParams, session_params: SessionStrParams, payment_params: PaymentStrParams, node_address: Option<String>, ) -> Result<SuccessResponse<_PutDeployResult>, Box<SdkError>>

Calls a smart contract entry point with the specified parameters and returns the result.

§Arguments
  • deploy_params - The deploy parameters.
  • session_params - The session parameters.
  • payment_params - The payment parameters.
  • node_address - An optional node address to send the request to.
§Returns

A Result containing either a _PutDeployResult or a SdkError in case of an error.

§Errors

Returns a SdkError if there is an error during the call.

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impl SDK

A set of functions for installing smart contracts on the blockchain. Alias of sdk.deploy

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pub async fn install( &self, deploy_params: DeployStrParams, session_params: SessionStrParams, payment_amount: &str, node_address: Option<String>, ) -> Result<SuccessResponse<_PutDeployResult>, Box<SdkError>>

Installs a smart contract with the specified parameters and returns the result.

§Arguments
  • deploy_params - The deploy parameters.
  • session_params - The session parameters.
  • payment_amount - The payment amount as a string.
  • node_address - An optional node address to send the request to.
§Returns

A Result containing either a PutDeployResult or a SdkError in case of an error.

§Errors

Returns a SdkError if there is an error during the installation.

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impl SDK

Alias of sdk.get_dictionary_item

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pub async fn query_contract_dict( &self, dictionary_item: DictionaryItemInput, state_root_hash: Option<impl ToDigest>, verbosity: Option<Verbosity>, node_address: Option<String>, ) -> Result<SuccessResponse<_GetDictionaryItemResult>, Box<SdkError>>

Query a contract dictionary item.

§Arguments
  • state_root_hash - State root hash.
  • dictionary_item - Dictionary item input.
  • verbosity - Optional verbosity level.
  • node_address - Optional node address.
§Returns

A Result containing either a SuccessResponse<GetDictionaryItemResult> or a SdkError in case of an error.

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impl SDK

Alias of sdk.query_global_state

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pub async fn query_contract_key( &self, query_params: QueryGlobalStateParams, ) -> Result<SuccessResponse<_QueryGlobalStateResult>, Box<SdkError>>

Query a contract key.

§Arguments
  • query_params - Query global state parameters.
§Returns

A Result containing either a SuccessResponse<QueryGlobalStateResult> or a SdkError in case of an error.

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impl SDK

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pub fn new(node_address: Option<String>, verbosity: Option<Verbosity>) -> Self

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pub fn get_node_address(&self, node_address: Option<String>) -> String

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pub fn set_node_address( &mut self, node_address: Option<String>, ) -> Result<(), String>

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pub fn get_verbosity(&self, verbosity: Option<Verbosity>) -> Verbosity

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pub fn set_verbosity( &mut self, verbosity: Option<Verbosity>, ) -> Result<(), String>

Trait Implementations§

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impl Default for SDK

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl From<SDK> for JsValue

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fn from(value: SDK) -> Self

Converts to this type from the input type.
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impl FromWasmAbi for SDK

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type Abi = u32

The Wasm ABI type that this converts from when coming back out from the ABI boundary.
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unsafe fn from_abi(js: u32) -> Self

Recover a Self from Self::Abi. Read more
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impl IntoWasmAbi for SDK

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type Abi = u32

The Wasm ABI type that this converts into when crossing the ABI boundary.
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fn into_abi(self) -> u32

Convert self into Self::Abi so that it can be sent across the wasm ABI boundary.
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impl LongRefFromWasmAbi for SDK

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type Abi = u32

Same as RefFromWasmAbi::Abi
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type Anchor = RcRef<SDK>

Same as RefFromWasmAbi::Anchor
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unsafe fn long_ref_from_abi(js: Self::Abi) -> Self::Anchor

Same as RefFromWasmAbi::ref_from_abi
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impl OptionFromWasmAbi for SDK

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fn is_none(abi: &Self::Abi) -> bool

Tests whether the argument is a “none” instance. If so it will be deserialized as None, and otherwise it will be passed to FromWasmAbi.
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impl OptionIntoWasmAbi for SDK

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fn none() -> Self::Abi

Returns an ABI instance indicating “none”, which JS will interpret as the None branch of this option. Read more
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impl RefFromWasmAbi for SDK

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type Abi = u32

The Wasm ABI type references to Self are recovered from.
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type Anchor = RcRef<SDK>

The type that holds the reference to Self for the duration of the invocation of the function that has an &Self parameter. This is required to ensure that the lifetimes don’t persist beyond one function call, and so that they remain anonymous.
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unsafe fn ref_from_abi(js: Self::Abi) -> Self::Anchor

Recover a Self::Anchor from Self::Abi. Read more
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impl RefMutFromWasmAbi for SDK

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type Abi = u32

Same as RefFromWasmAbi::Abi
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type Anchor = RcRefMut<SDK>

Same as RefFromWasmAbi::Anchor
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unsafe fn ref_mut_from_abi(js: Self::Abi) -> Self::Anchor

Same as RefFromWasmAbi::ref_from_abi
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impl TryFromJsValue for SDK

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type Error = JsValue

The type returned in the event of a conversion error.
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fn try_from_js_value(value: JsValue) -> Result<Self, Self::Error>

Performs the conversion.
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impl VectorFromWasmAbi for SDK

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type Abi = <Box<[JsValue]> as FromWasmAbi>::Abi

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unsafe fn vector_from_abi(js: Self::Abi) -> Box<[SDK]>

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impl VectorIntoJsValue for SDK

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fn vector_into_jsvalue(vector: Box<[SDK]>) -> JsValue

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impl VectorIntoWasmAbi for SDK

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type Abi = <Box<[JsValue]> as IntoWasmAbi>::Abi

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fn vector_into_abi(vector: Box<[SDK]>) -> Self::Abi

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impl WasmDescribe for SDK

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fn describe()

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impl WasmDescribeVector for SDK

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fn describe_vector()

Auto Trait Implementations§

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impl Freeze for SDK

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impl RefUnwindSafe for SDK

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impl Send for SDK

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impl Sync for SDK

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impl Unpin for SDK

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impl UnwindSafe for SDK

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impl<T> Any for T
where T: 'static + ?Sized,

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Gets the TypeId of self. Read more
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where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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fn from(t: T) -> T

Returns the argument unchanged.

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> ReturnWasmAbi for T
where T: IntoWasmAbi,

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type Abi = <T as IntoWasmAbi>::Abi

Same as IntoWasmAbi::Abi
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fn return_abi(self) -> <T as ReturnWasmAbi>::Abi

Same as IntoWasmAbi::into_abi, except that it may throw and never return in the case of Err.
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

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Performs the conversion.
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impl<V, T> VZip<V> for T
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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

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Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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impl<T> MaybeSendSync for T