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Fuel Asm

Icon LinkFuel ASM

Instruction set for the FuelVM Icon Link.

This is a wrapped WASM version of the fuel-asm Icon Link Rust crate:

Icon LinkUsage

This example demonstrates how to use the FuelAsm to create a program, represented as a vector of instructions, and then convert it to bytes. 

import { FuelAsm } from 'fuels';
 
// @ts-expect-error method reference missing in DTS
await FuelAsm.initWasm();
 
const programBytes = Uint8Array.from([
  ...FuelAsm.move_(0x10, 0x01).to_bytes(), // set r[0x10] := $one
  ...FuelAsm.slli(0x20, 0x10, 5).to_bytes(), // set r[0x20] := `r[0x10] << 5 == 32`
  ...FuelAsm.slli(0x21, 0x10, 6).to_bytes(), // set r[0x21] := `r[0x10] << 6 == 64`
  ...FuelAsm.aloc(0x21).to_bytes(), // alloc `r[0x21] == 64` to the heap
  ...FuelAsm.addi(0x10, 0x07, 1).to_bytes(), // set r[0x10] := `$hp + 1` (allocated heap)
  ...FuelAsm.move_(0x11, 0x04).to_bytes(), // set r[0x11] := $ssp
  ...FuelAsm.add(0x12, 0x04, 0x20).to_bytes(), // set r[0x12] := `$ssp + r[0x20]`
  ...FuelAsm.eck1(0x10, 0x11, 0x12).to_bytes(), // recover public key in memory[r[0x10], 64]
  ...FuelAsm.ret(0x01).to_bytes(), // return `1`
]);
 
console.log('Bytes', programBytes);

Icon LinkReference

The above usage is the Typescript equivalent of the original example Icon Link in Rust. 

use fuel_asm::*;
 
fn main() {
 
  let program = vec![
    op::move_(0x10, 0x01),      // set r[0x10] := $one
    op::slli(0x20, 0x10, 5),    // set r[0x20] := `r[0x10] << 5 == 32`
    op::slli(0x21, 0x10, 6),    // set r[0x21] := `r[0x10] << 6 == 64`
    op::aloc(0x21),             // alloc `r[0x21] == 64` to the heap
    op::addi(0x10, 0x07, 1),    // set r[0x10] := `$hp + 1` (allocated heap)
    op::move_(0x11, 0x04),      // set r[0x11] := $ssp
    op::add(0x12, 0x04, 0x20),  // set r[0x12] := `$ssp + r[0x20]`
    op::eck1(0x10, 0x11, 0x12), // recover public key in memory[r[0x10], 64]
    op::ret(0x01),              // return `1`
  ];
 
  let bytes: Vec<u8> = program.iter().copied().collect();
 
  println!("Bytes: {:#?}", bytes);
 
}

Icon LinkSee Also