nim-ethers/testmodule/providers/jsonrpc/testJsonRpcSigner.nim

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import pkg/asynctest
import pkg/ethers
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import pkg/stew/byteutils
import ../../examples
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suite "JsonRpcSigner":
var provider: JsonRpcProvider
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var accounts: seq[Address]
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setup:
provider = JsonRpcProvider.new()
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accounts = await provider.listAccounts()
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teardown:
await provider.close()
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test "is connected to the first account of the provider by default":
let signer = provider.getSigner()
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check (await signer.getAddress()) == accounts[0]
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test "can connect to a different account":
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let signer = provider.getSigner(accounts[1])
check (await signer.getAddress()) == accounts[1]
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test "can retrieve gas price":
let signer = provider.getSigner()
let gasprice = await signer.getGasPrice()
check gasprice > 0.u256
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test "can retrieve transaction count":
let signer = provider.getSigner(accounts[9])
let count = await signer.getTransactionCount(BlockTag.pending)
check count == 0.u256
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test "can estimate gas cost of a transaction":
let signer = provider.getSigner()
let estimate = await signer.estimateGas(Transaction.example)
check estimate > 0.u256
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test "can retrieve chain id":
let signer = provider.getSigner()
let chainId = await signer.getChainId()
check chainId == 31337.u256 # hardhat chain id
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test "can sign messages":
let signer = provider.getSigner()
let message = "hello".toBytes
check (await signer.signMessage(message)).len == 65
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test "can populate missing fields in a transaction":
let signer = provider.getSigner()
let transaction = Transaction.example
let populated = await signer.populateTransaction(transaction)
check !populated.sender == await signer.getAddress()
check !populated.gasPrice == await signer.getGasPrice()
check !populated.nonce == await signer.getTransactionCount(BlockTag.pending)
check !populated.gasLimit == await signer.estimateGas(transaction)
check !populated.chainId == await signer.getChainId()
test "populate does not overwrite existing fields":
let signer = provider.getSigner()
var transaction = Transaction.example
transaction.sender = some await signer.getAddress()
transaction.nonce = some UInt256.example
transaction.chainId = some await signer.getChainId()
transaction.gasPrice = some UInt256.example
transaction.gasLimit = some UInt256.example
let populated = await signer.populateTransaction(transaction)
check populated == transaction
test "populate fails when sender does not match signer address":
let signer = provider.getSigner()
var transaction = Transaction.example
transaction.sender = accounts[1].some
expect SignerError:
discard await signer.populateTransaction(transaction)
test "populate fails when chain id does not match":
let signer = provider.getSigner()
var transaction = Transaction.example
transaction.chainId = 0xdeadbeef.u256.some
expect SignerError:
discard await signer.populateTransaction(transaction)
test "concurrent populate calls increment nonce":
let signer = provider.getSigner()
let count = await signer.getTransactionCount(BlockTag.pending)
var transaction1 = Transaction.example
var transaction2 = Transaction.example
var transaction3 = Transaction.example
let populated = await allFinished(
signer.populateTransaction(transaction1),
signer.populateTransaction(transaction2),
signer.populateTransaction(transaction3)
)
transaction1 = await populated[0]
transaction2 = await populated[1]
transaction3 = await populated[2]
check !transaction1.nonce == count
check !transaction2.nonce == count + 1.u256
check !transaction3.nonce == count + 2.u256