Direct Invocation

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Token Limitations

As smart contracts running in a blockchain, tokens were designed to be isolated. Despite a token can invoke another token in the same blockchain, a token cannot directly invoke another token from a different blockchain.

Contracts cannot make HTTP calls

Contracts cannot digitally sign

Direct Invocations related ERCs

ERC	Title	Description
ERC-6944	ERC-5219 Resolve Mode	Adds an ERC-4804 resolveMode to support ERC-5219 requests
EIP-2696	JavaScript `request` method RPC transport	A standard for remote procedure calls between an Ethereum Provider and an Ethereum Client when both are able to interface with each other via a shared JavaScript object.
EIP-2700	JavaScript Provider Event Emitter	A standard mechanism for JavaScript Ethereum Providers to notify clients about chain state changes when both are able to interface with each other via a shared JavaScript object.