Filecoin support

[riptl]

Description

Adds support for Filecoin, implementing a secp256k1-based wallet.
(Old PR #784)

Changes

• Filecoin support (with secp256k1 wallet)

Checklist

• Support ID, SECP256K1, Actor and BLS Adresses.
• Pass test vectors from Lotus
• Add Signer & Transaction tests
• Send generated transaction to network
• Add token image (Add Logo for Filecoin assets#965)
• Wait for steps in Add support for Filecoin #780 to be resolved
• Update derivation path
• Add iOS/Android tests

Closes #780.

[codecov]

Codecov Report

Merging #811 into master will increase coverage by 0.06%.
The diff coverage is 94.05%.

@@            Coverage Diff             @@
##           master     #811      +/-   ##
==========================================
+ Coverage   90.09%   90.16%   +0.06%     
==========================================
  Files         345      351       +6     
  Lines       11272    11457     +185     
==========================================
+ Hits        10156    10330     +174     
- Misses       1116     1127      +11

Impacted Files	Coverage Δ
src/Coin.cpp	94% <0%> (-1.92%)	⬇️
src/Filecoin/Signer.cpp	100% <100%> (ø)
src/Filecoin/Transaction.cpp	100% <100%> (ø)
src/Filecoin/Transaction.h	100% <100%> (ø)
src/interface/TWFilecoinSigner.cpp	100% <100%> (ø)
src/Filecoin/Address.h	89.47% <89.47%> (ø)
src/Filecoin/Address.cpp	92.78% <92.78%> (ø)
... and 3 more

---

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[riptl]

Transaction generated by wallet-core now considered valid by Lotus node: 828855018ac93840e869c06b79b748a3c504b696bb339a7f5501cf01bf485f61435e6770b52615bf455e043a236101430017704200024200c80040584201477bcf9a71c9e19af77fbd92677230a9612d927877e439eb4aa306430a4ffae42251194820df211d00075e88e68c9704a880448532ec0092045a1e00e8f1cbb900

Sample request to push transaction as base64 to node (requires filecoin-project/lotus#1108)

{
	"jsonrpc":"2.0",
	"id":1,
	"method":"Filecoin.MpoolPush",
	"params":[
		"gohVAYrJOEDoacBrebdIo8UEtpa7M5p/VQHPAb9IX2FDXmdwtSYVv0VeBDojYQFDABdwQgACQgDIAEBYQgFHe8+accnhmvd/vZJncjCpYS2SeHfkOetKowZDCk/65CJRGUgg3yEdAAdeiOaMlwSogESFMuwAkgRaHgDo8cu5AA=="
	]
}

Gas spent was 126. The node uses 1000 as the default value for gas_limit.
Nonce needs to start at 1 and increments from there.

Message correctly deserialized by Lotus node:

(*types.SignedMessage)(0xc01e003830)({
 Message: (types.Message) {
  To: (address.Address) t1rletqqhinhagw6nxjcr4kbfws25thgt7owzuruy,
  From: (address.Address) t1z4a36sc7mfbv4z3qwutblp2flycdui3baffytbq,
  Nonce: (uint64) 1,
  Value: (types.BigInt) 6000,
  GasPrice: (types.BigInt) 2,
  GasLimit: (types.BigInt) 200,
  Method: (uint64) 0,
  Params: ([]uint8) {
  }
 },
 Signature: (types.Signature) {
  Type: (string) (len=9) "secp256k1",
  Data: ([]uint8) (len=65 cap=65) {
   00000000  47 7b cf 9a 71 c9 e1 9a  f7 7f bd 92 67 72 30 a9  |G{..q.......gr0.|
   00000010  61 2d 92 78 77 e4 39 eb  4a a3 06 43 0a 4f fa e4  |a-.xw.9.J..C.O..|
   00000020  22 51 19 48 20 df 21 1d  00 07 5e 88 e6 8c 97 04  |"Q.H .!...^.....|
   00000030  a8 80 44 85 32 ec 00 92  04 5a 1e 00 e8 f1 cb b9  |..D.2....Z......|
   00000040  00                                                |.|
  }
 }
})

[riptl]

@hewigovens I will add back BigInt support uint256_t for values. Lotus is using 18 decimal places, not 8!

[hewigovens]

@terorie Lmao, totally different order of magnitude

[optout21]

@hewigovens I will add back BigInt support uint256_t for values. Lotus is using 18 decimal places, not 8!

Don't forget to update that in coins.json as well.

[optout21]

@hewigovens , should this be done already using AnyAddress now?

[hewigovens]

@terorie can you rebase master? we don't need to have a new C interface for filecoin address, we will adopt TWAnyAddress as much as possible

[riptl]

Added filscan.io as block explorer:

• https://filscan.io/#/message/detail?cid=bafy2bzacecbm3ofxjjzcl2rg32ninphza34mm3ijr55zjsamwfqmz4ib63mqe
• https://filscan.io/#/address/detail?address=t1nbb73vhk5dtmnsgeaetbo76daepqjtrfoccn74i

filscan

filscan

[riptl]

@vikmeup @hewigovens Transactions generated by wallet-core were successfully mined on testnet! CID of mined SignedMessage: bafy2bzacebrz2m4otsmkxbx4kzdu2csx35dz3p3ap7tys3pnol6oyl5s3ts4s

It's ready for review+merge from my side.

[hewigovens]

nice work, left some comments (and there is one codacy warning)

[optout21]

Nice work, thanks for all the reworks!

[riptl]

@catenocrypt Good remarks, I fixed the remaining issues, squashed & rebased onto master!
I also got Codacy happy, so all tests now pass.