@project-serum/anchor - v0.25.0

account.<account-client>

To fetch a Counter account from the above example,

const counter = await program.account.counter.fetch(address);

For the full API, see the AccountClient reference.

The name of each field should match the name for that account in the IDL.

If multiple accounts are nested in the rust program, then they should be nested here.

instruction.<method>(...args, ctx);

1. args - The positional arguments for the program. The type and number of these arguments depend on the program being used.
2. ctx - Context non-argument parameters to pass to the method. Always the last parameter in the method call.

To create an instruction for the increment method above,

const tx = await program.instruction.increment({
  accounts: {
    counter,
  },
});

Keys are method names, values are RPC functions returning a TransactionInstruction.

rpc.<method>(...args, ctx);

1. args - The positional arguments for the program. The type and number of these arguments depend on the program being used.
2. ctx - Context non-argument parameters to pass to the method. Always the last parameter in the method call. ```

To send a transaction invoking the increment method above,

const txSignature = await program.rpc.increment({
  accounts: {
    counter,
    authority,
  },
});

One can use this to read data calculated from a program on chain, by emitting an event in the program and reading the emitted event client side via the simulate namespace.

program.simulate.<method>(...args, ctx);

1. args - The positional arguments for the program. The type and number of these arguments depend on the program being used.
2. ctx - Context non-argument parameters to pass to the method. Always the last parameter in the method call.

To simulate the increment method above,

const events = await program.simulate.increment({
  accounts: {
    counter,
  },
});

program.transaction.<method>(...args, ctx);

1. args - The positional arguments for the program. The type and number of these arguments depend on the program being used.
2. ctx - Context non-argument parameters to pass to the method. Always the last parameter in the method call.

To create an instruction for the increment method above,

const tx = await program.transaction.increment({
  accounts: {
    counter,
  },
});