nim-ethers/ethers/signer.nim

67 lines
2.4 KiB
Nim

import ./basics
import ./provider
export basics
type Signer* = ref object of RootObj
type SignerError* = object of EthersError
template raiseSignerError(message: string) =
raise newException(SignerError, message)
method provider*(signer: Signer): Provider {.base, gcsafe.} =
doAssert false, "not implemented"
method getAddress*(signer: Signer): Future[Address] {.base, gcsafe.} =
doAssert false, "not implemented"
method signMessage*(signer: Signer,
message: seq[byte]): Future[seq[byte]] {.base, async.} =
doAssert false, "not implemented"
method sendTransaction*(signer: Signer,
transaction: Transaction): Future[TransactionResponse] {.base, async.} =
doAssert false, "not implemented"
method getGasPrice*(signer: Signer): Future[UInt256] {.base, gcsafe.} =
signer.provider.getGasPrice()
method getTransactionCount*(signer: Signer,
blockTag = BlockTag.latest):
Future[UInt256] {.base, async.} =
let address = await signer.getAddress()
return await signer.provider.getTransactionCount(address, blockTag)
method estimateGas*(signer: Signer,
transaction: Transaction): Future[UInt256] {.base, async.} =
var transaction = transaction
transaction.sender = some(await signer.getAddress)
return await signer.provider.estimateGas(transaction)
method getChainId*(signer: Signer): Future[UInt256] {.base, gcsafe.} =
signer.provider.getChainId()
method populateTransaction*(signer: Signer,
transaction: Transaction):
Future[Transaction] {.base, async.} =
if sender =? transaction.sender and sender != await signer.getAddress():
raiseSignerError("from address mismatch")
if chainId =? transaction.chainId and chainId != await signer.getChainId():
raiseSignerError("chain id mismatch")
var populated = transaction
if transaction.sender.isNone:
populated.sender = some(await signer.getAddress())
if transaction.nonce.isNone:
populated.nonce = some(await signer.getTransactionCount(BlockTag.pending))
if transaction.chainId.isNone:
populated.chainId = some(await signer.getChainId())
if transaction.gasPrice.isNone and (transaction.maxFee.isNone or transaction.maxPriorityFee.isNone):
populated.gasPrice = some(await signer.getGasPrice())
if transaction.gasLimit.isNone:
populated.gasLimit = some(await signer.estimateGas(populated))
return populated