nwaku/waku/v2/protocol/waku_swap/waku_swap_contracts.nim

91 lines
2.7 KiB
Nim

# Glue code to interact with SWAP contracts module.
#
# Assumes swap-contracts-module node is running.
#
when (NimMajor, NimMinor) < (1, 4):
{.push raises: [Defect].}
else:
{.push raises: [].}
import
std/[osproc, strutils, json],
chronicles, stew/results
logScope:
topics = "waku swap"
# TODO Richer error types than string, overkill for now...
type NodeTaskJsonResult = Result[JsonNode, string]
# XXX In general this is not a great API, more a collection of hacky glue code for PoC.
# Interacts with node in sibling path and interacts with a local Hardhat node.
const taskPrelude = "npx hardhat --network localhost "
const cmdPrelude = "cd ../swap-contracts-module; " & taskPrelude
# proc execNodeTask(taskStr: string): tuple[output: string, exitCode: int] =
# let cmdString = $cmdPrelude & $taskStr
# debug "execNodeTask", cmdString
# return osproc.execCmdEx(cmdString)
proc execNodeTaskJson(taskStr: string): NodeTaskJsonResult =
let cmdString = $cmdPrelude & $taskStr
debug "execNodeTask", cmdString
try:
let (output, errC) = osproc.execCmdEx(cmdString)
if errC>0:
error "Error executing node task", output
return err(output)
debug "Command executed", output
try:
let json = parseJson(output)
return ok(json)
except JsonParsingError:
return err("Unable to parse JSON:" & $output)
except Exception:
return err("Unable to parse JSON:" & $output)
except OSError:
return err("Unable to execute command, OSError:" & $taskStr)
except Exception:
return err("Unable to execute command:" & $taskStr)
proc getBalance*(accountAddress: string): NodeTaskJsonResult =
let task = "balance --account " & $accountAddress
let res = execNodeTaskJson(task)
return res
proc setupSwap*(): NodeTaskJsonResult =
let task = "setupSwap"
let res = execNodeTaskJson(task)
return res
proc signCheque*(swapAddress: string): NodeTaskJsonResult =
let task = "signCheque --swapaddress '" & $swapAddress & "'"
var res = execNodeTaskJson(task)
return res
proc getERC20Balances*(erc20address: string): NodeTaskJsonResult =
let task = "getBalances --erc20address '" & $erc20address & "'"
let res = execNodeTaskJson(task)
debug "getERC20Balances", res
return res
proc redeemCheque*(swapAddress: string, signature: string): NodeTaskJsonResult =
let task = "redeemCheque --swapaddress '" & $swapAddress & "' --signature '" & $signature & "'"
let res = execNodeTaskJson(task)
return res
when isMainModule:
var aliceSwapAddress = "0x6C3d502f1a97d4470b881015b83D9Dd1062172e1"
var sigRes = signCheque(aliceSwapAddress)
if sigRes.isOk():
echo "All good"
echo "Signature ", sigRes[]
else:
echo sigRes