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Transfer from multisigs on Filecoin with a Ledger and Lotus

I'd like to thank @ribasushi for helping figuring all this out.

Running a lite node

git clone https://github.com/filecoin-project/lotus

cd lotus

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#!/usr/bin/env python3

# SPDX-License-Identifier: MIT

# Override every 32 byte with a zero. The input file is modified!
#
# Start e.g. with a file with random bytes:
#
#     dd if=/dev/urandom of=/tmp/random.dat count=1 bs=1MiB
#

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package main

import (
	"fmt"
	"io/ioutil"
	"log"
	"os"
	"github.com/consensys/gnark-crypto/ecc/bls12-381/fr"
)

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#!/bin/sh

# `OUT_DIR` determines where to put the files generated by this script.
# The default directory is `/tmp/lotusbenchdata`
${OUT_DIR:=/tmp/lotusbenchdata}
mkdir -p "${OUT_DIR}"

# Create unsealed sector file
./lotus-bench simple addpiece --sector-size 2K /dev/zero "${OUT_DIR}/unsealed"
# Run PreCommit1

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Filecoin replica encoding in Go

The encoding of a unsealed data into the replica data with a sector key is simple field additions. The Rust source is at https://github.com/filecoin-project/rust-fil-proofs/blob/fcb22da26b2ac6ea6acafd1da41cc4f098ae332b/storage-proofs-porep/src/encode.rs.

The following is a translation into a Python-like pseudo code, where I add the Go functions to call as comments.

def encode(key_bytes, value_bytes):
 '''`key_bytes` and `value_bytes` are each 32 bytes long.

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This is the pseudocode on how the labelling in PC1 works. It's for the 32GiB sector size production parameters.

Glossary:

• node: A "node" refers to a 256-bit (32 bytes) value of the padded input data. A 32 GiB sector as 1m nodes.
• label: A "label" refers to a 256-bit (32 bytes) value of one of the layers. It's the result of hashing the node index, layer index, replica ID and multiple labels together.

Inputs:

• parent_file: That's a pre-generated file (it's fixed and the same for everyone) that contains a list of random 32-bit integers that are used as offsets to read from a file.
• padded_data: A 32GiB file that has the padding already applied. "Padding" in this case means that each 0th and 1st bit is zero. It could be validated as:

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title	tags	description	slideOptions
IPLD Shallow Dive	IPLD, Launchpad	Launchpad V8 presentaiton 2023-01-18	width theme 1280 blood

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# SPDX-License-Identifier: MIT
#
# Takes a file and indents at `(` and `[`.
import sys


def main(argv=None):
    if argv is None:
        argv = sys.argv

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[package]
name = "halo2_sppark_msm"
version = "0.1.0"
edition = "2021"

[dependencies]
halo2_proofs = "0.2.0"
pasta-msm = "0.1.3"

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1. I'm opening a new Firefox window
2. I'm going to https://staging.wiki.osgeo.org/
3. I click on Log in on top right corner, which gets me to https://staging.wiki.osgeo.org/w/index.php?title=Special:UserLogin&returnto=Main+Page
4. It redirects to https://staging.wiki.osgeo.org/wiki/Main_Page
5. (BTW: It's 2022-05-23 9:54 CEST)
6. I enter:
   • Username: Vmische
   • Password: :)
   • Keep me logged in: No
7. I press "Log in" which gets me to https://staging.wiki.osgeo.org/w/index.php?title=Special:WikiUserMerge&returnto=Main_Page