Be sure to read the prerequisites to encoding.
Encoding is done via the ABIEncoder :
use fuels::{
core::{codec::ABIEncoder, traits::Tokenizable},
macros::Tokenizable,
};
#[derive(Tokenizable)]
struct MyStruct {
field: u64,
}
let instance = MyStruct { field: 101 };
let _encoded: Vec<u8> = ABIEncoder::default().encode(&[instance.into_token()])?; There is also a shortcut-macro that can encode multiple types which implement Tokenizable :
use fuels::{core::codec::calldata, macros::Tokenizable};
#[derive(Tokenizable)]
struct MyStruct {
field: u64,
}
let _: Vec<u8> = calldata!(MyStruct { field: 101 }, MyStruct { field: 102 })?;The encoder can be configured to limit its resource expenditure:
use fuels::core::codec::ABIEncoder;
ABIEncoder::new(EncoderConfig {
max_depth: 5,
max_tokens: 100,
}); The default values for the EncoderConfig are:
impl Default for EncoderConfig {
fn default() -> Self {
Self {
max_depth: 45,
max_tokens: 10_000,
}
}
}You can also configure the encoder used to encode the arguments of the contract method:
let _ = contract_instance
.with_encoder_config(EncoderConfig {
max_depth: 10,
max_tokens: 2_000,
})
.methods()
.initialize_counter(42)
.call()
.await?;The same method is available for script calls.