From 54c66db82769d6835c8d2f01bd089f4c5e0fffc2 Mon Sep 17 00:00:00 2001
From: Mark Spanbroek <mark@spanbroek.net>
Date: Mon, 24 Jan 2022 12:12:52 +0100
Subject: [PATCH] Adds Signer.getGasPrice()

---
 ethers.nim                               | 2 ++
 ethers/provider.nim                      | 3 +++
 ethers/providers/jsonrpc.nim             | 7 +++++++
 ethers/providers/rpccalls/signatures.nim | 1 +
 ethers/signer.nim                        | 9 ++++++++-
 testmodule/testJsonRpcSigner.nim         | 5 +++++
 6 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/ethers.nim b/ethers.nim
index 7c5af0f..f926969 100644
--- a/ethers.nim
+++ b/ethers.nim
@@ -1,7 +1,9 @@
 import ./ethers/provider
+import ./ethers/signer
 import ./ethers/providers/jsonrpc
 import ./ethers/contract
 
 export provider
+export signer
 export jsonrpc
 export contract
diff --git a/ethers/provider.nim b/ethers/provider.nim
index 5d9436d..7d27b98 100644
--- a/ethers/provider.nim
+++ b/ethers/provider.nim
@@ -14,3 +14,6 @@ method getBlockNumber*(provider: Provider): Future[UInt256] {.base.} =
 
 method call*(provider: Provider, tx: Transaction): Future[seq[byte]] {.base.} =
   doAssert false, "not implemented"
+
+method getGasPrice*(provider: Provider): Future[UInt256] {.base.} =
+  doAssert false, "not implemented"
diff --git a/ethers/providers/jsonrpc.nim b/ethers/providers/jsonrpc.nim
index c45a81d..27a4ac5 100644
--- a/ethers/providers/jsonrpc.nim
+++ b/ethers/providers/jsonrpc.nim
@@ -64,8 +64,15 @@ method call*(provider: JsonRpcProvider,
   let client = await provider.client
   return await client.eth_call(tx)
 
+method getGasPrice*(provider: JsonRpcProvider): Future[UInt256] {.async.} =
+  let client = await provider.client
+  return await client.eth_gasprice()
+
 # Signer
 
+method provider*(signer: JsonRpcSigner): Provider =
+  signer.provider
+
 method getAddress*(signer: JsonRpcSigner): Future[Address] {.async.} =
   if address =? signer.address:
     return address
diff --git a/ethers/providers/rpccalls/signatures.nim b/ethers/providers/rpccalls/signatures.nim
index 3fdc397..a053415 100644
--- a/ethers/providers/rpccalls/signatures.nim
+++ b/ethers/providers/rpccalls/signatures.nim
@@ -1,3 +1,4 @@
 proc eth_accounts: seq[Address]
 proc eth_blockNumber: UInt256
 proc eth_call(tx: Transaction): seq[byte]
+proc eth_gasPrice(): UInt256
diff --git a/ethers/signer.nim b/ethers/signer.nim
index e1a0618..37e5ee4 100644
--- a/ethers/signer.nim
+++ b/ethers/signer.nim
@@ -1,8 +1,15 @@
 import ./basics
+import ./provider
 
 export basics
 
 type Signer* = ref object of RootObj
 
-method getAddress*(signer: Signer): Future[Address] {.base, async.} =
+method provider*(signer: Signer): Provider {.base.} =
   doAssert false, "not implemented"
+
+method getAddress*(signer: Signer): Future[Address] {.base.} =
+  doAssert false, "not implemented"
+
+method getGasPrice*(signer: Signer): Future[UInt256] {.base.} =
+  signer.provider.getGasPrice()
diff --git a/testmodule/testJsonRpcSigner.nim b/testmodule/testJsonRpcSigner.nim
index 544c2c5..fa34e5b 100644
--- a/testmodule/testJsonRpcSigner.nim
+++ b/testmodule/testJsonRpcSigner.nim
@@ -16,3 +16,8 @@ suite "JsonRpcSigner":
     let account = (await provider.listAccounts())[1]
     let signer = provider.getSigner(account)
     check (await signer.getAddress()) == account
+
+  test "can retrieve gas price":
+    let signer = provider.getSigner()
+    let gasprice = await signer.getGasPrice()
+    check gasprice > 0.u256