Add Provider.getBlock()

Only returns hash, number and timestamp for now.

ethers/provider.nim

@@ -19,10 +19,17 @@ type
     topics*: seq[Topic]
   LogHandler* = proc(log: Log) {.gcsafe, upraises:[].}
   Topic* = array[32, byte]
+  Block* = object
+    number*: UInt256
+    timestamp*: UInt256
+    hash*: array[32, byte]
 
 method getBlockNumber*(provider: Provider): Future[UInt256] {.base.} =
   doAssert false, "not implemented"
 
+method getBlock*(provider: Provider, tag: BlockTag): Future[Block] {.base.} =
+  doAssert false, "not implemented"
+
 method call*(provider: Provider, tx: Transaction): Future[seq[byte]] {.base.} =
   doAssert false, "not implemented"
 

ethers/providers/jsonrpc.nim

@@ -70,6 +70,11 @@ method getBlockNumber*(provider: JsonRpcProvider): Future[UInt256] {.async.} =
   let client = await provider.client
   return await client.eth_blockNumber()
 
+method getBlock*(provider: JsonRpcProvider,
+                 tag: BlockTag): Future[?Block] {.async.} =
+  let client = await provider.client
+  return await client.eth_getBlockByNumber(tag, false)
+
 method call*(provider: JsonRpcProvider,
              tx: Transaction): Future[seq[byte]] {.async.} =
   let client = await provider.client

ethers/providers/jsonrpc/signatures.nim

@@ -3,6 +3,7 @@ proc eth_accounts: seq[Address]
 proc eth_blockNumber: UInt256
 proc eth_call(transaction: Transaction): seq[byte]
 proc eth_gasPrice(): UInt256
+proc eth_getBlockByNumber(blockTag: BlockTag, includeTransactions: bool): ?Block
 proc eth_getTransactionCount(address: Address, blockTag: BlockTag): UInt256
 proc eth_estimateGas(transaction: Transaction): UInt256
 proc eth_chainId(): UInt256

testmodule/testJsonRpcProvider.nim

@@ -32,3 +32,10 @@ suite "JsonRpcProvider":
     discard await provider.send("evm_mine")
     let blocknumber2 = await provider.getBlockNumber()
     check blocknumber2 > blocknumber1
+
+  test "returns block":
+    let block1 = !await provider.getBlock(BlockTag.earliest)
+    let block2 = !await provider.getBlock(BlockTag.latest)
+    check block1.hash != block2.hash
+    check block1.number < block2.number
+    check block1.timestamp < block2.timestamp