feat: add support for Kupo (#256)

Signed-off-by: Ales Verbic <verbotenj@blinklabs.io>

go.mod

@@ -5,14 +5,17 @@ go 1.21
 toolchain go1.21.6
 
 require (
-	github.com/blinklabs-io/gouroboros v0.96.0
+	github.com/SundaeSwap-finance/kugo v1.0.5
+	github.com/SundaeSwap-finance/ogmigo/v6 v6.0.0-20231128043329-e8ced51013a1
+	github.com/blinklabs-io/gouroboros v0.99.0
 	github.com/gen2brain/beeep v0.0.0-20230602101333-f384c29b62dd
 	github.com/gin-gonic/gin v1.10.0
 	github.com/kelseyhightower/envconfig v1.4.0
 	github.com/stretchr/testify v1.9.0
 	github.com/swaggo/files v1.0.1
 	github.com/swaggo/gin-swagger v1.6.0
 	github.com/swaggo/swag v1.16.3
+	github.com/utxorpc/go-codegen v0.10.0
 	go.uber.org/automaxprocs v1.6.0
 	golang.org/x/oauth2 v0.23.0
 	gopkg.in/yaml.v2 v2.4.0
@@ -25,6 +28,8 @@ require (
 	cloud.google.com/go/compute/metadata v0.3.0 // indirect
 	filippo.io/edwards25519 v1.1.0 // indirect
 	github.com/KyleBanks/depth v1.2.1 // indirect
+	github.com/aws/aws-sdk-go v1.48.7 // indirect
+	github.com/buger/jsonparser v1.1.1 // indirect
 	github.com/bytedance/sonic v1.11.6 // indirect
 	github.com/bytedance/sonic/loader v0.1.1 // indirect
 	github.com/cloudwego/base64x v0.1.4 // indirect
@@ -43,7 +48,9 @@ require (
 	github.com/go-toast/toast v0.0.0-20190211030409-01e6764cf0a4 // indirect
 	github.com/goccy/go-json v0.10.2 // indirect
 	github.com/godbus/dbus/v5 v5.1.0 // indirect
+	github.com/gorilla/websocket v1.5.1 // indirect
 	github.com/jinzhu/copier v0.4.0 // indirect
+	github.com/jmespath/go-jmespath v0.4.0 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/klauspost/cpuid/v2 v2.2.7 // indirect
@@ -59,13 +66,13 @@ require (
 	github.com/tadvi/systray v0.0.0-20190226123456-11a2b8fa57af // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
 	github.com/ugorji/go/codec v1.2.12 // indirect
-	github.com/utxorpc/go-codegen v0.9.0 // indirect
 	github.com/x448/float16 v0.8.4 // indirect
 	golang.org/x/arch v0.8.0 // indirect
-	golang.org/x/crypto v0.27.0 // indirect
+	golang.org/x/crypto v0.28.0 // indirect
 	golang.org/x/net v0.25.0 // indirect
-	golang.org/x/sys v0.25.0 // indirect
-	golang.org/x/text v0.18.0 // indirect
+	golang.org/x/sync v0.8.0 // indirect
+	golang.org/x/sys v0.26.0 // indirect
+	golang.org/x/text v0.19.0 // indirect
 	golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d // indirect
 	google.golang.org/protobuf v1.34.2 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect

go.sum

@@ -4,10 +4,18 @@ filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
 filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
 github.com/KyleBanks/depth v1.2.1 h1:5h8fQADFrWtarTdtDudMmGsC7GPbOAu6RVB3ffsVFHc=
 github.com/KyleBanks/depth v1.2.1/go.mod h1:jzSb9d0L43HxTQfT+oSA1EEp2q+ne2uh6XgeJcm8brE=
-github.com/blinklabs-io/gouroboros v0.96.0 h1:UYF2fwOo9MT6uHrpwHz+1krVib6SZ9sDkZ/C5KQxwdA=
-github.com/blinklabs-io/gouroboros v0.96.0/go.mod h1:lfvV4sV5tNz/qkaLiR85pKpKqPlHfAa5wFhWGbgsXZ0=
-github.com/blinklabs-io/ouroboros-mock v0.3.3 h1:c6jN9qcLzNQSVh3zjPE61gF33UkkRRIiNqSGBkZ10cY=
-github.com/blinklabs-io/ouroboros-mock v0.3.3/go.mod h1:UXkR/8qA5w/WtkzffOIdXudgOndN99DEorgRwy4ynN8=
+github.com/SundaeSwap-finance/kugo v1.0.5 h1:GWUbHkAIIMh1SmGMCw5r0rpOvriRsEoLpp5ofufWRvs=
+github.com/SundaeSwap-finance/kugo v1.0.5/go.mod h1:jkNGTmwLRdUPKVzkOOQjxqkpPTDw5gJ2hkJi3zUF9tA=
+github.com/SundaeSwap-finance/ogmigo/v6 v6.0.0-20231128043329-e8ced51013a1 h1:Lfw4vCNhm5Ik5wdbPsCK8k4gphhCB2/jtLxY5s/EifA=
+github.com/SundaeSwap-finance/ogmigo/v6 v6.0.0-20231128043329-e8ced51013a1/go.mod h1:CsDGcgbkKoz6S4h0RJ30go7oXG+KhGE2KLhBpRFnEqA=
+github.com/aws/aws-sdk-go v1.48.7 h1:gDcOhmkohlNk20j0uWpko5cLBbwSkB+xpkshQO45F7Y=
+github.com/aws/aws-sdk-go v1.48.7/go.mod h1:LF8svs817+Nz+DmiMQKTO3ubZ/6IaTpq3TjupRn3Eqk=
+github.com/blinklabs-io/gouroboros v0.99.0 h1:tGiti2mPjQM/rVOYi1ZrCSlKh8Qt3iQUkDdsOeWKuvw=
+github.com/blinklabs-io/gouroboros v0.99.0/go.mod h1:gU9pBcL1h584sVqYF8H7JJcB2x0n1HdWcmWP11VYxPE=
+github.com/blinklabs-io/ouroboros-mock v0.3.4 h1:codPfiI5vLeD6YdhKL5VwYSzy2N3Dsgx6xjcLsqFaJQ=
+github.com/blinklabs-io/ouroboros-mock v0.3.4/go.mod h1:e/wgG1ZYVenroN2XEMXy7DgEfdmP7KXVRHIQKuh8E/0=
+github.com/buger/jsonparser v1.1.1 h1:2PnMjfWD7wBILjqQbt530v576A/cAbQvEW9gGIpYMUs=
+github.com/buger/jsonparser v1.1.1/go.mod h1:6RYKKt7H4d4+iWqouImQ9R2FZql3VbhNgx27UK13J/0=
 github.com/bytedance/sonic v1.11.6 h1:oUp34TzMlL+OY1OUWxHqsdkgC/Zfc85zGqw9siXjrc0=
 github.com/bytedance/sonic v1.11.6/go.mod h1:LysEHSvpvDySVdC2f87zGWf6CIKJcAvqab1ZaiQtds4=
 github.com/bytedance/sonic/loader v0.1.1 h1:c+e5Pt1k/cy5wMveRDyk2X4B9hF4g7an8N3zCYjJFNM=
@@ -65,8 +73,14 @@ github.com/godbus/dbus/v5 v5.1.0/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5x
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
+github.com/gorilla/websocket v1.5.1 h1:gmztn0JnHVt9JZquRuzLw3g4wouNVzKL15iLr/zn/QY=
+github.com/gorilla/websocket v1.5.1/go.mod h1:x3kM2JMyaluk02fnUJpQuwD2dCS5NDG2ZHL0uE0tcaY=
 github.com/jinzhu/copier v0.4.0 h1:w3ciUoD19shMCRargcpm0cm91ytaBhDvuRpz1ODO/U8=
 github.com/jinzhu/copier v0.4.0/go.mod h1:DfbEm0FYsaqBcKcFuvmOZb218JkPGtvSHsKg8S8hyyg=
+github.com/jmespath/go-jmespath v0.4.0 h1:BEgLn5cpjn8UN1mAw4NjwDrS35OdebyEtFe+9YPoQUg=
+github.com/jmespath/go-jmespath v0.4.0/go.mod h1:T8mJZnbsbmF+m6zOOFylbeCJqk5+pHWvzYPziyZiYoo=
+github.com/jmespath/go-jmespath/internal/testify v1.5.1 h1:shLQSRRSCCPj3f2gpwzGwWFoC7ycTf1rcQZHOlsJ6N8=
+github.com/jmespath/go-jmespath/internal/testify v1.5.1/go.mod h1:L3OGu8Wl2/fWfCI6z80xFu9LTZmf1ZRjMHUOPmWr69U=
 github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
 github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
 github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
@@ -100,6 +114,8 @@ github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJ
 github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9Gz0M=
 github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e/go.mod h1:zD1mROLANZcx1PVRCS0qkT7pwLkGfwJo4zjcN/Tysno=
+github.com/nsf/jsondiff v0.0.0-20210926074059-1e845ec5d249 h1:NHrXEjTNQY7P0Zfx1aMrNhpgxHmow66XQtm0aQLY0AE=
+github.com/nsf/jsondiff v0.0.0-20210926074059-1e845ec5d249/go.mod h1:mpRZBD8SJ55OIICQ3iWH0Yz3cjzA61JdqMLoWXeB2+8=
 github.com/nu7hatch/gouuid v0.0.0-20131221200532-179d4d0c4d8d h1:VhgPp6v9qf9Agr/56bj7Y/xa04UccTW04VP0Qed4vnQ=
 github.com/nu7hatch/gouuid v0.0.0-20131221200532-179d4d0c4d8d/go.mod h1:YUTz3bUH2ZwIWBy3CJBeOBEugqcmXREj14T+iG/4k4U=
 github.com/pelletier/go-toml/v2 v2.2.2 h1:aYUidT7k73Pcl9nb2gScu7NSrKCSHIDE89b3+6Wq+LM=
@@ -132,12 +148,14 @@ github.com/swaggo/swag v1.16.3 h1:PnCYjPCah8FK4I26l2F/KQ4yz3sILcVUN3cTlBFA9Pg=
 github.com/swaggo/swag v1.16.3/go.mod h1:DImHIuOFXKpMFAQjcC7FG4m3Dg4+QuUgUzJmKjI/gRk=
 github.com/tadvi/systray v0.0.0-20190226123456-11a2b8fa57af h1:6yITBqGTE2lEeTPG04SN9W+iWHCRyHqlVYILiSXziwk=
 github.com/tadvi/systray v0.0.0-20190226123456-11a2b8fa57af/go.mod h1:4F09kP5F+am0jAwlQLddpoMDM+iewkxxt6nxUQ5nq5o=
+github.com/tj/assert v0.0.3 h1:Df/BlaZ20mq6kuai7f5z2TvPFiwC3xaWJSDQNiIS3Rk=
+github.com/tj/assert v0.0.3/go.mod h1:Ne6X72Q+TB1AteidzQncjw9PabbMp4PBMZ1k+vd1Pvk=
 github.com/twitchyliquid64/golang-asm v0.15.1 h1:SU5vSMR7hnwNxj24w34ZyCi/FmDZTkS4MhqMhdFk5YI=
 github.com/twitchyliquid64/golang-asm v0.15.1/go.mod h1:a1lVb/DtPvCB8fslRZhAngC2+aY1QWCk3Cedj/Gdt08=
 github.com/ugorji/go/codec v1.2.12 h1:9LC83zGrHhuUA9l16C9AHXAqEV/2wBQ4nkvumAE65EE=
 github.com/ugorji/go/codec v1.2.12/go.mod h1:UNopzCgEMSXjBc6AOMqYvWC1ktqTAfzJZUZgYf6w6lg=
-github.com/utxorpc/go-codegen v0.9.0 h1:sV5vK/QiQs3WvKynRVo+U+5n2tmKU7yMz5y3rEX90Hg=
-github.com/utxorpc/go-codegen v0.9.0/go.mod h1:+npvJc9wftIf8JMtWaRXxwjX0YlOCpNp1OlZVioNEO0=
+github.com/utxorpc/go-codegen v0.10.0 h1:EVRNc136CThXbbGeYV/oIy6NKfcZGLH2QSRmLTPE6TQ=
+github.com/utxorpc/go-codegen v0.10.0/go.mod h1:+npvJc9wftIf8JMtWaRXxwjX0YlOCpNp1OlZVioNEO0=
 github.com/x448/float16 v0.8.4 h1:qLwI1I70+NjRFUR3zs1JPUCgaCXSh3SW62uAKT1mSBM=
 github.com/x448/float16 v0.8.4/go.mod h1:14CWIYCyZA/cWjXOioeEpHeN/83MdbZDRQHoFcYsOfg=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
@@ -150,8 +168,8 @@ golang.org/x/arch v0.8.0 h1:3wRIsP3pM4yUptoR96otTUOXI367OS0+c9eeRi9doIc=
 golang.org/x/arch v0.8.0/go.mod h1:FEVrYAQjsQXMVJ1nsMoVVXPZg6p2JE2mx8psSWTDQys=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/crypto v0.27.0 h1:GXm2NjJrPaiv/h1tb2UH8QfgC/hOf/+z0p6PT8o1w7A=
-golang.org/x/crypto v0.27.0/go.mod h1:1Xngt8kV6Dvbssa53Ziq6Eqn0HqbZi5Z6R0ZpwQzt70=
+golang.org/x/crypto v0.28.0 h1:GBDwsMXVQi34v5CCYUm2jkJvu4cbtru2U4TN2PSyQnw=
+golang.org/x/crypto v0.28.0/go.mod h1:rmgy+3RHxRZMyY0jjAJShp2zgEdOqj2AO7U0pYmeQ7U=
 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
 golang.org/x/mod v0.17.0 h1:zY54UmvipHiNd+pm+m0x9KhZ9hl1/7QNMyxXbc6ICqA=
 golang.org/x/mod v0.17.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
@@ -174,17 +192,17 @@ golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.25.0 h1:r+8e+loiHxRqhXVl6ML1nO3l1+oFoWbnlu2Ehimmi34=
-golang.org/x/sys v0.25.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.26.0 h1:KHjCJyddX0LoSTb3J+vWpupP9p0oznkqVk/IfjymZbo=
+golang.org/x/sys v0.26.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
-golang.org/x/text v0.18.0 h1:XvMDiNzPAl0jr17s6W9lcaIhGUfUORdGCNsuLmPG224=
-golang.org/x/text v0.18.0/go.mod h1:BuEKDfySbSR4drPmRPG/7iBdf8hvFMuRexcpahXilzY=
+golang.org/x/text v0.19.0 h1:kTxAhCbGbxhK0IwgSKiMO5awPoDQ0RpfiVYBfK860YM=
+golang.org/x/text v0.19.0/go.mod h1:BuEKDfySbSR4drPmRPG/7iBdf8hvFMuRexcpahXilzY=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
@@ -199,6 +217,7 @@ gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

input/chainsync/chainsync.go

@@ -15,10 +15,17 @@
 package chainsync
 
 import (
+	"context"
 	"encoding/hex"
 	"fmt"
+	"log/slog"
+	"net/http"
+	"strings"
 	"time"
 
+	"github.com/SundaeSwap-finance/kugo"
+
+	"github.com/SundaeSwap-finance/ogmigo/v6/ouroboros/chainsync"
 	"github.com/blinklabs-io/adder/event"
 	"github.com/blinklabs-io/adder/plugin"
 
@@ -59,6 +66,8 @@ type ChainSync struct {
 	cursorCache        []ocommon.Point
 	dialAddress        string
 	dialFamily         string
+	kupoUrl            string
+	kupoClient         *kugo.Client
 }
 
 type ChainSyncStatus struct {
@@ -318,7 +327,12 @@ func (c *ChainSync) handleRollForward(
 		blockEvt := event.New("chainsync.block", time.Now(), NewBlockHeaderContext(v), NewBlockEvent(block, c.includeCbor))
 		c.eventChan <- blockEvt
 		for t, transaction := range block.Transactions() {
-			txEvt := event.New("chainsync.transaction", time.Now(), NewTransactionContext(block, transaction, uint32(t), c.networkMagic), NewTransactionEvent(block, transaction, c.includeCbor))
+			resolvedInputs, err := resolveTransactionInputs(transaction, c)
+			if err != nil {
+				return err
+			}
+			txEvt := event.New("chainsync.transaction", time.Now(), NewTransactionContext(block, transaction, uint32(t), c.networkMagic),
+				NewTransactionEvent(block, transaction, c.includeCbor, resolvedInputs))
 			c.eventChan <- txEvt
 		}
 		c.updateStatus(v.SlotNumber(), v.BlockNumber(), v.Hash(), tip.Point.Slot, hex.EncodeToString(tip.Point.Hash))
@@ -339,6 +353,10 @@ func (c *ChainSync) handleBlockFetchBlock(
 	)
 	c.eventChan <- blockEvt
 	for t, transaction := range block.Transactions() {
+		resolvedInputs, err := resolveTransactionInputs(transaction, c)
+		if err != nil {
+			return err
+		}
 		txEvt := event.New(
 			"chainsync.transaction",
 			time.Now(),
@@ -348,7 +366,7 @@ func (c *ChainSync) handleBlockFetchBlock(
 				uint32(t),
 				c.networkMagic,
 			),
-			NewTransactionEvent(block, transaction, c.includeCbor),
+			NewTransactionEvent(block, transaction, c.includeCbor, resolvedInputs),
 		)
 		c.eventChan <- txEvt
 	}
@@ -403,3 +421,76 @@ func (c *ChainSync) updateStatus(
 		c.statusUpdateFunc(*(c.status))
 	}
 }
+
+func getKupoClient(c *ChainSync) (*kugo.Client, error) {
+	if c.kupoClient != nil {
+		return c.kupoClient, nil
+	}
+
+	k := kugo.New(kugo.WithEndpoint(c.kupoUrl))
+
+	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
+	defer cancel()
+
+	healthUrl := strings.TrimRight(c.kupoUrl, "/") + "/v1/health"
+	req, err := http.NewRequestWithContext(ctx, "GET", healthUrl, nil)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create health check request: %w", err)
+	}
+
+	client := &http.Client{}
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("failed to perform health check: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("health check failed with status code: %d", resp.StatusCode)
+	}
+
+	c.kupoClient = k
+
+	return k, nil
+}
+
+// resolveTransactionInputs resolves the transaction inputs by using the
+// Kupo client and fetching the corresponding transaction outputs.
+func resolveTransactionInputs(transaction ledger.Transaction, c *ChainSync) ([]ledger.TransactionOutput, error) {
+	var resolvedInputs []ledger.TransactionOutput
+
+	// Use Kupo client to resolve inputs if available
+	if c.kupoUrl != "" {
+		k, err := getKupoClient(c)
+		if err != nil {
+			return nil, fmt.Errorf("failed to get Kupo client: %w", err)
+		}
+
+		for _, input := range transaction.Inputs() {
+			// Extract transaction ID and index from the input
+			txId := input.Id().String()
+			txIndex := int(input.Index())
+			matches, err := k.Matches(context.Background(),
+				kugo.TxOut(chainsync.NewTxID(txId, txIndex)),
+			)
+			if err != nil {
+				return nil, fmt.Errorf("Error fetching matches for input TxId: %s, Index: %d. Error: %w\n", txId, txIndex, err)
+			}
+
+			if len(matches) == 0 {
+				slog.Info("No matches found for input TxId: %s, Index: %d, could be due to Kupo not in sync\n", txId, txIndex)
+			} else {
+				slog.Debug(fmt.Sprintf("Found matches %d for input TxId: %s, Index: %d\n", len(matches), txId, txIndex))
+				for _, match := range matches {
+					slog.Debug(fmt.Sprintf("Match: %#v\n", match))
+					transactionOutput, err := NewResolvedTransactionOutput(match)
+					if err != nil {
+						return nil, err
+					}
+					resolvedInputs = append(resolvedInputs, transactionOutput)
+				}
+			}
+		}
+	}
+	return resolvedInputs, nil
+}

input/chainsync/options.go

@@ -107,3 +107,9 @@ func WithBulkMode(bulkMode bool) ChainSyncOptionFunc {
 		c.bulkMode = bulkMode
 	}
 }
+
+func WithKupoUrl(kupoUrl string) ChainSyncOptionFunc {
+	return func(c *ChainSync) {
+		c.kupoUrl = kupoUrl
+	}
+}

input/chainsync/plugin.go

@@ -36,6 +36,7 @@ var cmdlineOptions struct {
 	intersectPoint string
 	includeCbor    bool
 	autoReconnect  bool
+	kupoUrl        string
 }
 
 func init() {
@@ -118,6 +119,13 @@ func init() {
 					DefaultValue: true,
 					Dest:         &(cmdlineOptions.autoReconnect),
 				},
+				{
+					Name:         "kupo-url",
+					Type:         plugin.PluginOptionTypeString,
+					Description:  "kupo-url address",
+					DefaultValue: "",
+					Dest:         &(cmdlineOptions.kupoUrl),
+				},
 			},
 		},
 	)
@@ -136,6 +144,7 @@ func NewFromCmdlineOptions() plugin.Plugin {
 		WithBulkMode(cmdlineOptions.bulkMode),
 		WithIncludeCbor(cmdlineOptions.includeCbor),
 		WithAutoReconnect(cmdlineOptions.autoReconnect),
+		WithKupoUrl(cmdlineOptions.kupoUrl),
 	}
 	if cmdlineOptions.intersectPoint != "" {
 		intersectPoints := []ocommon.Point{}