Initial pools.rs function for handling custom parameters

substreams/Cargo.lock

@@ -241,6 +241,8 @@ dependencies = [
  "num-bigint",
  "prost 0.11.9",
  "prost-types 0.12.3",
+ "serde",
+ "serde_qs",
  "substreams",
  "substreams-ethereum",
  "tycho-substreams",
@@ -572,6 +574,12 @@ dependencies = [
  "syn 1.0.109",
 ]
 
+[[package]]
+name = "percent-encoding"
+version = "2.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e3148f5046208a5d56bcfc03053e3ca6334e51da8dfb19b6cdc8b306fae3283e"
+
 [[package]]
 name = "petgraph"
 version = "0.6.4"
@@ -869,6 +877,17 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "serde_qs"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cd34f36fe4c5ba9654417139a9b3a20d2e1de6012ee678ad14d240c22c78d8d6"
+dependencies = [
+ "percent-encoding",
+ "serde",
+ "thiserror",
+]
+
 [[package]]
 name = "sha3"
 version = "0.10.8"