56 lines
1.8 KiB
Rust
56 lines
1.8 KiB
Rust
use crate::transition_blocks::load_from_ssz;
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use clap::ArgMatches;
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use ssz::Encode;
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use state_processing::per_slot_processing;
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use std::fs::File;
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use std::io::prelude::*;
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use std::path::PathBuf;
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use types::{BeaconState, EthSpec};
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pub fn run<T: EthSpec>(matches: &ArgMatches) -> Result<(), String> {
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let pre_state_path = matches
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.value_of("pre-state")
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.ok_or_else(|| "No pre-state file supplied".to_string())?
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.parse::<PathBuf>()
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.map_err(|e| format!("Failed to parse pre-state path: {}", e))?;
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let slots = matches
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.value_of("slots")
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.ok_or_else(|| "No slots supplied".to_string())?
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.parse::<usize>()
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.map_err(|e| format!("Failed to parse slots: {}", e))?;
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let output_path = matches
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.value_of("output")
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.ok_or_else(|| "No output file supplied".to_string())?
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.parse::<PathBuf>()
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.map_err(|e| format!("Failed to parse output path: {}", e))?;
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info!("Using {} spec", T::spec_name());
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info!("Pre-state path: {:?}", pre_state_path);
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info!("Slots: {:?}", slots);
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let mut state: BeaconState<T> = load_from_ssz(pre_state_path)?;
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let spec = &T::default_spec();
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state
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.build_all_caches(spec)
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.map_err(|e| format!("Unable to build caches: {:?}", e))?;
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// Transition the parent state to the block slot.
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for i in 0..slots {
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per_slot_processing(&mut state, None, spec)
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.map_err(|e| format!("Failed to advance slot on iteration {}: {:?}", i, e))?;
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}
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let mut output_file =
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File::create(output_path).map_err(|e| format!("Unable to create output file: {:?}", e))?;
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output_file
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.write_all(&state.as_ssz_bytes())
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.map_err(|e| format!("Unable to write to output file: {:?}", e))?;
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Ok(())
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}
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