Devnet test transaction call data for Osaka

[OlivierBBB]

MODEXP test vectors

Calling MODEXP in a smart contract

If we provide the call data via the transaction we should do something akin to copy the transaction's call data in full to RAM.

// do a full copy of call data to RAM

CALLDATASIZE
PUSH0
PUSH0
CALLDATACOPY

This pre-populates memory with relevant call data for the MODEXP call to come. A CALL to MODEXP with the following parameters should then follow

// the CALL to MODEXP

PUSH2 rac   // rac = 1024
PUSH2 rao   // rao = 96 + 3*1024
PUSH2 cds   // cds = 96 + 3*1024
PUSH0       // zero call data offset
PUSH0       // zero value
PUSH20 0x0000000000000000000000000000000000000005
GAS
CALL 

Transaction call data

Transaction call data shoud look like so

< 32 bytes for bbs > < 32 bytes for ebs > < 32 bytes for mbs > < base, exponent, modulus proper>

// bbs = base byte size
// ebs = exponent byte size
// mbs = modulus byte size

e.g.

00000000000000000000000000000000000000000000000000000000000003ff 0000000000000000000000000000000000000000000000000000000000000020 0000000000000000000000000000000000000000000000000000000000000020 < gibberish >
<----------------------------bbs-------------------------------> <----------------------------ebs-------------------------------> <----------------------------mbs-------------------------------> <data proper>

in each case these initial 96 bytes being followed by 3 * 1024 random (nonzero) bytes

and again being followed by by 3 * 1024 random (nonzero) bytes (that shouldn't matter in any case)

Purpose

The purpose of the above is twofold:

• the first tests are there to test the new legal range of MODEXP calls as per Osaka
• the next tests are there to test the internal handling out of bounds of MODEXP calls without the sequencer rejecting the transaction

[thedarkjester]

On Devnet: 0xe41F1F9E2477C508decceD102B5b5609Af85c305

For each of the 7 scenarios, you can use the specific calldata below:

0x000000000000000000000000000000000000000000000000000000000000020100000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000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[thedarkjester]

You can load up Remix, with the following (create a testModExp.abi file and open it)

[
	{
		"payable": true,
		"stateMutability": "payable",
		"type": "fallback"
	}
]

Then you can (after connecting to injected provider) load at address: 0xdD5eee2C88c2658ABD2006aa330F69880E052af4 - confirm you want to interact with it.

Add the calldata in the last comment to test

[OlivierBBB]

Very large, EVM unsupported MODEXP calls

Same thing, but with memory having been pre-populated with one of the following

// VERY large base byte size case
0000000000000000000000000000000000000000000000000000000000000401 // 1025
0000000000000000000000000000000000000000000000000000000000000100
0000000000000000000000000000000000000000000000000000000000000100

// VERY large exponent byte size case
0000000000000000000000000000000000000000000000000000000000000100
000000000000000000000000000000000000000000000000000000000000ffff // 65535
0000000000000000000000000000000000000000000000000000000000000100

// VERY large modulus byte size case
0000000000000000000000000000000000000000000000000000000000000100
0000000000000000000000000000000000000000000000000000000000000100
0000000000000000000000000000000100000000000000000000000000000000 // 2**128

// humongous everything
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
1111111111111111111111111111111111111111111111111111111111111111
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff

[OlivierBBB]

Large, EVM supported MODEXP

// large base byte size case
0000000000000000000000000000000000000000000000000000000000000201 // 513
0000000000000000000000000000000000000000000000000000000000000100
0000000000000000000000000000000000000000000000000000000000000100

// large exponent byte size case
0000000000000000000000000000000000000000000000000000000000000100
0000000000000000000000000000000000000000000000000000000000000300 // 768
0000000000000000000000000000000000000000000000000000000000000100

// large modulus byte size case
0000000000000000000000000000000000000000000000000000000000000100
0000000000000000000000000000000000000000000000000000000000000100
0000000000000000000000000000000000000000000000000000000000000400 // 1024

[OlivierBBB]

Moderate unsupported MODEXP calls

// large base byte size case
0000000000000000000000000000000000000000000000000000000000000201 // 513
0000000000000000000000000000000000000000000000000000000000000040
0000000000000000000000000000000000000000000000000000000000000020

cost = 2 * words^2 * max(0 + 16 * 32, 1)
     = 2 * 65**2 * 16 * 32
     = 4_326_400

// large base byte size case
0000000000000000000000000000000000000000000000000000000000000020
0000000000000000000000000000000000000000000000000000000000000201 // 513
0000000000000000000000000000000000000000000000000000000000000020

cost = 2 * words^2 * max(0 + 16 * (513 - 32), 1)
     = 2 * 4**2 * 16 * (513 - 32)
     = 246_272

// large base byte size case
0000000000000000000000000000000000000000000000000000000000000020
0000000000000000000000000000000000000000000000000000000000000030
0000000000000000000000000000000000000000000000000000000000000201 // 513

cost = 2 * words^2 * max(0 + 16 * 16, 1)
     = 2 * 65**2 * 16 * 16
     = 2_163_200

[OlivierBBB]

Minimalist unsupported MODEXP calls

// large base byte size case
0000000000000000000000000000000000000000000000000000000000000201 // 513
0000000000000000000000000000000000000000000000000000000000000001
0000000000000000000000000000000000000000000000000000000000000001

cost = 2 * words^2 * max(0 + 16 * 0, 1)
     = 2 * 65**2 * 1
     = 8_450

// large base byte size case
0000000000000000000000000000000000000000000000000000000000000001
0000000000000000000000000000000000000000000000000000000000000201 // 513
0000000000000000000000000000000000000000000000000000000000000001

cost = 2 * words^2 * max(0 + 16 * (513 - 32), 1)
     = 2 * 1**2 * 16 * (513 - 32)
     = 15_392

// large base byte size case
0000000000000000000000000000000000000000000000000000000000000001
0000000000000000000000000000000000000000000000000000000000000001
0000000000000000000000000000000000000000000000000000000000000201 // 513

cost = 8_450

[VGau]

Tested the following scenarios:

0x000000000000000000000000000000000000000000000000000000000000020100000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000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All tests passed. Here are the transactions:

• First case:
  • url: https://explorer.devnet.linea.build/tx/0x00bd98a3d93a307e7fd4e38f9631537ddd44a020641736d6b63228e6e7c41297
  • Response: 0x0000000000000000000000000000000000000000000000000000000000000001
• Second case:
  • url: https://explorer.devnet.linea.build/tx/0x98047f50f467a5c6f5f269f5e56aa19cfecf39b6ed7112ab9870ab600debef27
  • Response: 0x0000000000000000000000000000000000000000000000000000000000000001
• Third case:
  • url: https://explorer.devnet.linea.build/tx/0x13d9a1e21a4540f8a1589163daa6c8e4bede4e2b18d1e6ad3e29a9c34856785a
  • Response: 0x0000000000000000000000000000000000000000000000000000000000000201

[OlivierBBB]

@VGau I am confused by these responses. First of all: what is it you call the response ?

These responses, whatever they are, coincide with the expected RETURNDATASIZEs of each call. EVM conventions dictate that a ** b mod 0 always be 0, so these responses cannot be the return data itself.